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Author SHA1 Message Date
Shile Zhang
6cd73be5b6 sched/rt: Show the 'sched_rr_timeslice' SCHED_RR timeslice tuning knob in milliseconds 
[ Upstream commit 975e155ed8 ]

We added the 'sched_rr_timeslice_ms' SCHED_RR tuning knob in this commit:

  ce0dbbbb30 ("sched/rt: Add a tuning knob to allow changing SCHED_RR timeslice")

... which name suggests to users that it's in milliseconds, while in reality
it's being set in milliseconds but the result is shown in jiffies.

This is obviously confusing when HZ is not 1000, it makes it appear like the
value set failed, such as HZ=100:

  root# echo 100 > /proc/sys/kernel/sched_rr_timeslice_ms
  root# cat /proc/sys/kernel/sched_rr_timeslice_ms
  10

Fix this to be milliseconds all around.

Signed-off-by: Shile Zhang <shile.zhang@nokia.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1485612049-20923-1-git-send-email-shile.zhang@nokia.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 2023-05-16 08:29:07 +09:00
Juri Lelli
c7afe2f482 sched/core: Fix PI boosting between RT and DEADLINE tasks 
[ Upstream commit 740797ce3a ]

syzbot reported the following warning:

 WARNING: CPU: 1 PID: 6351 at kernel/sched/deadline.c:628
 enqueue_task_dl+0x22da/0x38a0 kernel/sched/deadline.c:1504

At deadline.c:628 we have:

 623 static inline void setup_new_dl_entity(struct sched_dl_entity *dl_se)
 624 {
 625 	struct dl_rq *dl_rq = dl_rq_of_se(dl_se);
 626 	struct rq *rq = rq_of_dl_rq(dl_rq);
 627
 628 	WARN_ON(dl_se->dl_boosted);
 629 	WARN_ON(dl_time_before(rq_clock(rq), dl_se->deadline));
        [...]
     }

Which means that setup_new_dl_entity() has been called on a task
currently boosted. This shouldn't happen though, as setup_new_dl_entity()
is only called when the 'dynamic' deadline of the new entity
is in the past w.r.t. rq_clock and boosted tasks shouldn't verify this
condition.

Digging through the PI code I noticed that what above might in fact happen
if an RT tasks blocks on an rt_mutex hold by a DEADLINE task. In the
first branch of boosting conditions we check only if a pi_task 'dynamic'
deadline is earlier than mutex holder's and in this case we set mutex
holder to be dl_boosted. However, since RT 'dynamic' deadlines are only
initialized if such tasks get boosted at some point (or if they become
DEADLINE of course), in general RT 'dynamic' deadlines are usually equal
to 0 and this verifies the aforementioned condition.

Fix it by checking that the potential donor task is actually (even if
temporary because in turn boosted) running at DEADLINE priority before
using its 'dynamic' deadline value.

Fixes: 2d3d891d33 ("sched/deadline: Add SCHED_DEADLINE inheritance logic")
Reported-by: syzbot+119ba87189432ead09b4@syzkaller.appspotmail.com
Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Tested-by: Daniel Wagner <dwagner@suse.de>
Link: https://lkml.kernel.org/r/20181119153201.GB2119@localhost.localdomain
Signed-off-by: Sasha Levin <sashal@kernel.org>
 2023-05-16 08:21:43 +09:00
KeMeng Shi
4dd4d296e4 sched/core: Fix migration to invalid CPU in __set_cpus_allowed_ptr() 
[ Upstream commit 714e501e16 ]

An oops can be triggered in the scheduler when running qemu on arm64:

 Unable to handle kernel paging request at virtual address ffff000008effe40
 Internal error: Oops: 96000007 [#1] SMP
 Process migration/0 (pid: 12, stack limit = 0x00000000084e3736)
 pstate: 20000085 (nzCv daIf -PAN -UAO)
 pc : __ll_sc___cmpxchg_case_acq_4+0x4/0x20
 lr : move_queued_task.isra.21+0x124/0x298
 ...
 Call trace:
  __ll_sc___cmpxchg_case_acq_4+0x4/0x20
  __migrate_task+0xc8/0xe0
  migration_cpu_stop+0x170/0x180
  cpu_stopper_thread+0xec/0x178
  smpboot_thread_fn+0x1ac/0x1e8
  kthread+0x134/0x138
  ret_from_fork+0x10/0x18

__set_cpus_allowed_ptr() will choose an active dest_cpu in affinity mask to
migrage the process if process is not currently running on any one of the
CPUs specified in affinity mask. __set_cpus_allowed_ptr() will choose an
invalid dest_cpu (dest_cpu >= nr_cpu_ids, 1024 in my virtual machine) if
CPUS in an affinity mask are deactived by cpu_down after cpumask_intersects
check. cpumask_test_cpu() of dest_cpu afterwards is overflown and may pass if
corresponding bit is coincidentally set. As a consequence, kernel will
access an invalid rq address associate with the invalid CPU in
migration_cpu_stop->__migrate_task->move_queued_task and the Oops occurs.

The reproduce the crash:

  1) A process repeatedly binds itself to cpu0 and cpu1 in turn by calling
  sched_setaffinity.

  2) A shell script repeatedly does "echo 0 > /sys/devices/system/cpu/cpu1/online"
  and "echo 1 > /sys/devices/system/cpu/cpu1/online" in turn.

  3) Oops appears if the invalid CPU is set in memory after tested cpumask.

Signed-off-by: KeMeng Shi <shikemeng@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1568616808-16808-1-git-send-email-shikemeng@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 2023-05-15 14:47:59 +09:00
Juri Lelli
379d8495bb sched/core: Fix CPU controller for !RT_GROUP_SCHED 
[ Upstream commit a07db5c086 ]

On !CONFIG_RT_GROUP_SCHED configurations it is currently not possible to
move RT tasks between cgroups to which CPU controller has been attached;
but it is oddly possible to first move tasks around and then make them
RT (setschedule to FIFO/RR).

E.g.:

  # mkdir /sys/fs/cgroup/cpu,cpuacct/group1
  # chrt -fp 10 $$
  # echo $$ > /sys/fs/cgroup/cpu,cpuacct/group1/tasks
  bash: echo: write error: Invalid argument
  # chrt -op 0 $$
  # echo $$ > /sys/fs/cgroup/cpu,cpuacct/group1/tasks
  # chrt -fp 10 $$
  # cat /sys/fs/cgroup/cpu,cpuacct/group1/tasks
  2345
  2598
  # chrt -p 2345
  pid 2345's current scheduling policy: SCHED_FIFO
  pid 2345's current scheduling priority: 10

Also, as Michal noted, it is currently not possible to enable CPU
controller on unified hierarchy with !CONFIG_RT_GROUP_SCHED (if there
are any kernel RT threads in root cgroup, they can't be migrated to the
newly created CPU controller's root in cgroup_update_dfl_csses()).

Existing code comes with a comment saying the "we don't support RT-tasks
being in separate groups". Such comment is however stale and belongs to
pre-RT_GROUP_SCHED times. Also, it doesn't make much sense for
!RT_GROUP_ SCHED configurations, since checks related to RT bandwidth
are not performed at all in these cases.

Make moving RT tasks between CPU controller groups viable by removing
special case check for RT (and DEADLINE) tasks.

Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Reviewed-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: lizefan@huawei.com
Cc: longman@redhat.com
Cc: luca.abeni@santannapisa.it
Cc: rostedt@goodmis.org
Link: https://lkml.kernel.org/r/20190719063455.27328-1-juri.lelli@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 2023-05-15 14:33:01 +09:00
Konstantin Khlebnikov
20d5853eb1 sched/core: Handle overflow in cpu_shares_write_u64 
[ Upstream commit 5b61d50ab4 ]

Bit shift in scale_load() could overflow shares. This patch saturates
it to MAX_SHARES like following sched_group_set_shares().

Example:

 # echo 9223372036854776832 > cpu.shares
 # cat cpu.shares

Before patch: 1024
After pattch: 262144

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/155125501891.293431.3345233332801109696.stgit@buzz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 2023-05-15 13:34:43 +09:00
Konstantin Khlebnikov
4b9fcac57f sched/core: Check quota and period overflow at usec to nsec conversion 
[ Upstream commit 1a8b4540db ]

Large values could overflow u64 and pass following sanity checks.

 # echo 18446744073750000 > cpu.cfs_period_us
 # cat cpu.cfs_period_us
 40448

 # echo 18446744073750000 > cpu.cfs_quota_us
 # cat cpu.cfs_quota_us
 40448

After this patch they will fail with -EINVAL.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/155125502079.293431.3947497929372138600.stgit@buzz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 2023-05-15 13:34:41 +09:00
Ben Hutchings
4f87cf8ebb sched: Add sched_smt_active() 
Add the sched_smt_active() function needed for some x86 speculation
mitigations.  This was introduced upstream by commits 1b568f0aab
"sched/core: Optimize SCHED_SMT", ba2591a599 "sched/smt: Update
sched_smt_present at runtime", c5511d03ec "sched/smt: Make
sched_smt_present track topology", and 321a874a7e "sched/smt: Expose
sched_smt_present static key".  The upstream implementation uses the
static_key_{disable,enable}_cpuslocked() functions, which aren't
practical to backport.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2023-05-15 12:47:12 +09:00
Steven Rostedt (VMware)
5e8e590433 sched/core: Allow __sched_setscheduler() in interrupts when PI is not used 
commit 896bbb2522 upstream.

When priority inheritance was added back in 2.6.18 to sched_setscheduler(), it
added a path to taking an rt-mutex wait_lock, which is not IRQ safe. As PI
is not a common occurrence, lockdep will likely never trigger if
sched_setscheduler was called from interrupt context. A BUG_ON() was added
to trigger if __sched_setscheduler() was ever called from interrupt context
because there was a possibility to take the wait_lock.

Today the wait_lock is irq safe, but the path to taking it in
sched_setscheduler() is the same as the path to taking it from normal
context. The wait_lock is taken with raw_spin_lock_irq() and released with
raw_spin_unlock_irq() which will indiscriminately enable interrupts,
which would be bad in interrupt context.

The problem is that normalize_rt_tasks, which is called by triggering the
sysrq nice-all-RT-tasks was changed to call __sched_setscheduler(), and this
is done from interrupt context!

Now __sched_setscheduler() takes a "pi" parameter that is used to know if
the priority inheritance should be called or not. As the BUG_ON() only cares
about calling the PI code, it should only bug if called from interrupt
context with the "pi" parameter set to true.

Reported-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Tested-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: dbc7f069b9 ("sched: Use replace normalize_task() with __sched_setscheduler()")
Link: http://lkml.kernel.org/r/20170308124654.10e598f2@gandalf.local.home
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2023-05-15 09:59:19 +09:00
Victor Wan
cc7b1eac54 Merge branch 'android-4.9' into amlogic-4.9-dev 
Signed-off-by: Victor Wan <victor.wan@amlogic.com>

 Conflicts:
	drivers/md/dm-bufio.c
	drivers/media/dvb-core/dvb_frontend.c
	drivers/usb/dwc3/core.c
	drivers/usb/gadget/function/f_fs.c
 2018-08-07 14:43:24 +08:00
Sultan Alsawaf
47bbcd6bf8 ANDROID: Fix massive cpufreq_times memory leaks 
Every time _cpu_up() is called for a CPU, idle_thread_get() is called
which then re-initializes a CPU's idle thread that was already
previously created and cached in a global variable in
smpboot.c. idle_thread_get() calls init_idle() which then calls
__sched_fork(). __sched_fork() is where cpufreq_task_times_init() is,
and cpufreq_task_times_init() allocates memory for the task struct's
time_in_state array.

Since idle_thread_get() reuses a task struct instance that was already
previously created, this means that every time it calls init_idle(),
cpufreq_task_times_init() allocates this array again and overwrites
the existing allocation that the idle thread already had.

This causes memory to be leaked every time a CPU is onlined. In order
to fix this, move allocation of time_in_state into _do_fork to avoid
allocating it at all for idle threads. The cpufreq times interface is
intended to be used for tracking userspace tasks, so we can safely
remove it from the kernel's idle threads without killing any
functionality.

But that's not all!

Task structs can be freed outside of release_task(), which creates
another memory leak because a task struct can be freed without having
its cpufreq times allocation freed. To fix this, free the cpufreq
times allocation at the same time that task struct allocations are
freed, in free_task().

Since free_task() can also be called in error paths of copy_process()
after dup_task_struct(), set time_in_state to NULL immediately after
calling dup_task_struct() to avoid possible double free.

Bug description and fix adapted from patch submitted by
Sultan Alsawaf <sultanxda@gmail.com> at
https://android-review.googlesource.com/c/kernel/msm/+/700134

Bug: 110044919
Test: Hikey960 builds, boots & reports /proc/<pid>/time_in_state
correctly
Change-Id: I12fe7611fc88eb7f6c39f8f7629ad27b6ec4722c
Signed-off-by: Connor O'Brien <connoro@google.com>
 2018-07-18 13:22:08 +00:00
Connor O'Brien
23a1412b82 ANDROID: Reduce use of #ifdef CONFIG_CPU_FREQ_TIMES 
Add empty versions of functions to cpufreq_times.h to cut down on use
of #ifdef in .c files.

Test: kernel builds with and without CONFIG_CPU_FREQ_TIMES=y
Change-Id: I49ac364fac3d42bba0ca1801e23b15081094fb12
Signed-off-by: Connor O'Brien <connoro@google.com>
 2018-07-18 13:21:52 +00:00
jianxin.pan
874ce1dbf4 sched: disable SD_WAKE_AFFINE 
PD#165090: remove WAKE_AFFINE to get better balance when heavy loading

Change-Id: Id5650e9c3fd12b23be04f8f52a0f5c2e11c49199
Signed-off-by: jianxin.pan <jianxin.pan@amlogic.com>
 2018-06-29 00:10:07 -07:00
Victor Wan
324524de04 Merge branch 'android-4.9' into amlogic-4.9-dev 2018-05-22 10:48:42 +08:00
Victor Wan
810c6dd972 Merge branch 'android-4.9' into amlogic-4.9-dev 
Signed-off-by: Victor Wan <victor.wan@amlogic.com>

Conflicts:
	arch/arm/configs/bcm2835_defconfig
	arch/arm/configs/sunxi_defconfig
	include/linux/cpufreq.h
	init/main.c
 2018-04-24 17:43:19 +08:00
Greg Kroah-Hartman
8683408f8e Merge 4.9.94 into android-4.9 
Changes in 4.9.94
	qed: Fix overriding of supported autoneg value.
	cfg80211: make RATE_INFO_BW_20 the default
	md/raid5: make use of spin_lock_irq over local_irq_disable + spin_lock
	rtc: snvs: fix an incorrect check of return value
	x86/asm: Don't use RBP as a temporary register in csum_partial_copy_generic()
	x86/mm/kaslr: Use the _ASM_MUL macro for multiplication to work around Clang incompatibility
	ovl: persistent inode numbers for upper hardlinks
	NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION
	x86/boot: Declare error() as noreturn
	IB/srpt: Fix abort handling
	IB/srpt: Avoid that aborting a command triggers a kernel warning
	af_key: Fix slab-out-of-bounds in pfkey_compile_policy.
	mac80211: bail out from prep_connection() if a reconfig is ongoing
	bna: Avoid reading past end of buffer
	qlge: Avoid reading past end of buffer
	ubi: fastmap: Fix slab corruption
	ipmi_ssif: unlock on allocation failure
	net: cdc_ncm: Fix TX zero padding
	net: ethernet: ti: cpsw: adjust cpsw fifos depth for fullduplex flow control
	lockd: fix lockd shutdown race
	drivers/misc/vmw_vmci/vmci_queue_pair.c: fix a couple integer overflow tests
	pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()
	s390: move _text symbol to address higher than zero
	net/mlx4_en: Avoid adding steering rules with invalid ring
	qed: Correct doorbell configuration for !4Kb pages
	NFSv4.1: Work around a Linux server bug...
	CIFS: silence lockdep splat in cifs_relock_file()
	perf/callchain: Force USER_DS when invoking perf_callchain_user()
	blk-mq: NVMe 512B/4K+T10 DIF/DIX format returns I/O error on dd with split op
	net: qca_spi: Fix alignment issues in rx path
	netxen_nic: set rcode to the return status from the call to netxen_issue_cmd
	mdio: mux: Correct mdio_mux_init error path issues
	Input: elan_i2c - check if device is there before really probing
	Input: elantech - force relative mode on a certain module
	KVM: PPC: Book3S PR: Check copy_to/from_user return values
	irqchip/mbigen: Fix the clear register offset calculation
	vmxnet3: ensure that adapter is in proper state during force_close
	mm, vmstat: Remove spurious WARN() during zoneinfo print
	SMB2: Fix share type handling
	bus: brcmstb_gisb: Use register offsets with writes too
	bus: brcmstb_gisb: correct support for 64-bit address output
	PowerCap: Fix an error code in powercap_register_zone()
	iio: pressure: zpa2326: report interrupted case as failure
	ARM: dts: imx53-qsrb: Pulldown PMIC IRQ pin
	staging: wlan-ng: prism2mgmt.c: fixed a double endian conversion before calling hfa384x_drvr_setconfig16, also fixes relative sparse warning
	clk: renesas: rcar-gen2: Fix PLL0 on R-Car V2H and E2
	x86/tsc: Provide 'tsc=unstable' boot parameter
	powerpc/modules: If mprofile-kernel is enabled add it to vermagic
	ARM: dts: imx6qdl-wandboard: Fix audio channel swap
	i2c: mux: reg: put away the parent i2c adapter on probe failure
	arm64: perf: Ignore exclude_hv when kernel is running in HYP
	mdio: mux: fix device_node_continue.cocci warnings
	ipv6: avoid dad-failures for addresses with NODAD
	async_tx: Fix DMA_PREP_FENCE usage in do_async_gen_syndrome()
	KVM: arm: Restore banked registers and physical timer access on hyp_panic()
	KVM: arm64: Restore host physical timer access on hyp_panic()
	usb: dwc3: keystone: check return value
	btrfs: fix incorrect error return ret being passed to mapping_set_error
	ata: libahci: properly propagate return value of platform_get_irq()
	ipmr: vrf: Find VIFs using the actual device
	uio: fix incorrect memory leak cleanup
	neighbour: update neigh timestamps iff update is effective
	arp: honour gratuitous ARP _replies_
	ARM: dts: rockchip: fix rk322x i2s1 pinctrl error
	usb: chipidea: properly handle host or gadget initialization failure
	pxa_camera: fix module remove codepath for v4l2 clock
	USB: ene_usb6250: fix first command execution
	net: x25: fix one potential use-after-free issue
	USB: ene_usb6250: fix SCSI residue overwriting
	serial: 8250: omap: Disable DMA for console UART
	serial: sh-sci: Fix race condition causing garbage during shutdown
	net/wan/fsl_ucc_hdlc: fix unitialized variable warnings
	net/wan/fsl_ucc_hdlc: fix incorrect memory allocation
	fsl/qe: add bit description for SYNL register for GUMR
	sh_eth: Use platform device for printing before register_netdev()
	mlxsw: spectrum: Avoid possible NULL pointer dereference
	scsi: csiostor: fix use after free in csio_hw_use_fwconfig()
	powerpc/mm: Fix virt_addr_valid() etc. on 64-bit hash
	ath5k: fix memory leak on buf on failed eeprom read
	selftests/powerpc: Fix TM resched DSCR test with some compilers
	xfrm: fix state migration copy replay sequence numbers
	ASoC: simple-card: fix mic jack initialization
	iio: hi8435: avoid garbage event at first enable
	iio: hi8435: cleanup reset gpio
	iio: light: rpr0521 poweroff for probe fails
	ext4: handle the rest of ext4_mb_load_buddy() ENOMEM errors
	md-cluster: fix potential lock issue in add_new_disk
	ARM: davinci: da8xx: Create DSP device only when assigned memory
	ray_cs: Avoid reading past end of buffer
	net/wan/fsl_ucc_hdlc: fix muram allocation error
	leds: pca955x: Correct I2C Functionality
	perf/core: Fix error handling in perf_event_alloc()
	sched/numa: Use down_read_trylock() for the mmap_sem
	gpio: crystalcove: Do not write regular gpio registers for virtual GPIOs
	net/mlx5: Tolerate irq_set_affinity_hint() failures
	selinux: do not check open permission on sockets
	block: fix an error code in add_partition()
	mlx5: fix bug reading rss_hash_type from CQE
	net: ieee802154: fix net_device reference release too early
	libceph: NULL deref on crush_decode() error path
	perf report: Fix off-by-one for non-activation frames
	netfilter: ctnetlink: fix incorrect nf_ct_put during hash resize
	pNFS/flexfiles: missing error code in ff_layout_alloc_lseg()
	ASoC: rsnd: SSI PIO adjust to 24bit mode
	scsi: bnx2fc: fix race condition in bnx2fc_get_host_stats()
	fix race in drivers/char/random.c:get_reg()
	ext4: fix off-by-one on max nr_pages in ext4_find_unwritten_pgoff()
	ARM64: PCI: Fix struct acpi_pci_root_ops allocation failure path
	tcp: better validation of received ack sequences
	net: move somaxconn init from sysctl code
	Input: elan_i2c - clear INT before resetting controller
	bonding: Don't update slave->link until ready to commit
	cpuhotplug: Link lock stacks for hotplug callbacks
	PCI/msi: fix the pci_alloc_irq_vectors_affinity stub
	KVM: X86: Fix preempt the preemption timer cancel
	KVM: nVMX: Fix handling of lmsw instruction
	net: llc: add lock_sock in llc_ui_bind to avoid a race condition
	drm/msm: Take the mutex before calling msm_gem_new_impl
	i40iw: Fix sequence number for the first partial FPDU
	i40iw: Correct Q1/XF object count equation
	ARM: dts: ls1021a: add "fsl,ls1021a-esdhc" compatible string to esdhc node
	thermal: power_allocator: fix one race condition issue for thermal_instances list
	perf probe: Add warning message if there is unexpected event name
	l2tp: fix missing print session offset info
	rds; Reset rs->rs_bound_addr in rds_add_bound() failure path
	ACPI / video: Default lcd_only to true on Win8-ready and newer machines
	net/mlx4_en: Change default QoS settings
	VFS: close race between getcwd() and d_move()
	PM / devfreq: Fix potential NULL pointer dereference in governor_store
	hwmon: (ina2xx) Make calibration register value fixed
	media: videobuf2-core: don't go out of the buffer range
	ASoC: Intel: Skylake: Disable clock gating during firmware and library download
	ASoC: Intel: cht_bsw_rt5645: Analog Mic support
	scsi: libiscsi: Allow sd_shutdown on bad transport
	scsi: mpt3sas: Proper handling of set/clear of "ATA command pending" flag.
	irqchip/gic-v3: Fix the driver probe() fail due to disabled GICC entry
	ACPI: EC: Fix debugfs_create_*() usage
	mac80211: Fix setting TX power on monitor interfaces
	vfb: fix video mode and line_length being set when loaded
	gpio: label descriptors using the device name
	IB/rdmavt: Allocate CQ memory on the correct node
	blk-mq: fix race between updating nr_hw_queues and switching io sched
	backlight: tdo24m: Fix the SPI CS between transfers
	pinctrl: baytrail: Enable glitch filter for GPIOs used as interrupts
	ASoC: Intel: sst: Fix the return value of 'sst_send_byte_stream_mrfld()'
	rt2x00: do not pause queue unconditionally on error path
	wl1251: check return from call to wl1251_acx_arp_ip_filter
	hdlcdrv: Fix divide by zero in hdlcdrv_ioctl
	x86/efi: Disable runtime services on kexec kernel if booted with efi=old_map
	netfilter: conntrack: don't call iter for non-confirmed conntracks
	HID: i2c: Call acpi_device_fix_up_power for ACPI-enumerated devices
	ovl: filter trusted xattr for non-admin
	powerpc/[booke|4xx]: Don't clobber TCR[WP] when setting TCR[DIE]
	dmaengine: imx-sdma: Handle return value of clk_prepare_enable
	backlight: Report error on failure
	arm64: futex: Fix undefined behaviour with FUTEX_OP_OPARG_SHIFT usage
	net/mlx5: avoid build warning for uniprocessor
	cxgb4: FW upgrade fixes
	cxgb4: Fix netdev_features flag
	rtc: m41t80: fix SQW dividers override when setting a date
	i40evf: fix merge error in older patch
	rtc: opal: Handle disabled TPO in opal_get_tpo_time()
	rtc: interface: Validate alarm-time before handling rollover
	SUNRPC: ensure correct error is reported by xs_tcp_setup_socket()
	net: freescale: fix potential null pointer dereference
	clk: at91: fix clk-generated parenting
	drm/sun4i: Ignore the generic connectors for components
	dt-bindings: display: sun4i: Add allwinner,tcon-channel property
	mtd: nand: gpmi: Fix gpmi_nand_init() error path
	mtd: nand: check ecc->total sanity in nand_scan_tail
	KVM: SVM: do not zero out segment attributes if segment is unusable or not present
	clk: scpi: fix return type of __scpi_dvfs_round_rate
	clk: Fix __set_clk_rates error print-string
	powerpc/spufs: Fix coredump of SPU contexts
	drm/amdkfd: NULL dereference involving create_process()
	ath10k: add BMI parameters to fix calibration from DT/pre-cal
	perf trace: Add mmap alias for s390
	qlcnic: Fix a sleep-in-atomic bug in qlcnic_82xx_hw_write_wx_2M and qlcnic_82xx_hw_read_wx_2M
	arm64: kernel: restrict /dev/mem read() calls to linear region
	mISDN: Fix a sleep-in-atomic bug
	net: phy: micrel: Restore led_mode and clk_sel on resume
	RDMA/iw_cxgb4: Avoid touch after free error in ARP failure handlers
	RDMA/hfi1: fix array termination by appending NULL to attr array
	drm/omap: fix tiled buffer stride calculations
	powerpc/8xx: fix mpc8xx_get_irq() return on no irq
	cxgb4: fix incorrect cim_la output for T6
	Fix serial console on SNI RM400 machines
	bio-integrity: Do not allocate integrity context for bio w/o data
	ip6_tunnel: fix traffic class routing for tunnels
	skbuff: return -EMSGSIZE in skb_to_sgvec to prevent overflow
	macsec: check return value of skb_to_sgvec always
	sit: reload iphdr in ipip6_rcv
	net/mlx4: Fix the check in attaching steering rules
	net/mlx4: Check if Granular QoS per VF has been enabled before updating QP qos_vport
	perf header: Set proper module name when build-id event found
	perf report: Ensure the perf DSO mapping matches what libdw sees
	iwlwifi: mvm: fix firmware debug restart recording
	watchdog: f71808e_wdt: Add F71868 support
	iwlwifi: mvm: Fix command queue number on d0i3 flow
	iwlwifi: tt: move ucode_loaded check under mutex
	iwlwifi: pcie: only use d0i3 in suspend/resume if system_pm is set to d0i3
	iwlwifi: fix min API version for 7265D, 3168, 8000 and 8265
	tags: honor COMPILED_SOURCE with apart output directory
	ARM: dts: qcom: ipq4019: fix i2c_0 node
	e1000e: fix race condition around skb_tstamp_tx()
	igb: fix race condition with PTP_TX_IN_PROGRESS bits
	cxl: Unlock on error in probe
	cx25840: fix unchecked return values
	mceusb: sporadic RX truncation corruption fix
	net: phy: avoid genphy_aneg_done() for PHYs without clause 22 support
	ARM: imx: Add MXC_CPU_IMX6ULL and cpu_is_imx6ull
	nvme-pci: fix multiple ctrl removal scheduling
	nvme: fix hang in remove path
	KVM: nVMX: Update vmcs12->guest_linear_address on nested VM-exit
	e1000e: Undo e1000e_pm_freeze if __e1000_shutdown fails
	perf/core: Correct event creation with PERF_FORMAT_GROUP
	sched/deadline: Use the revised wakeup rule for suspending constrained dl tasks
	MIPS: mm: fixed mappings: correct initialisation
	MIPS: mm: adjust PKMAP location
	MIPS: kprobes: flush_insn_slot should flush only if probe initialised
	ARM: dts: armadillo800eva: Split LCD mux and gpio
	Fix loop device flush before configure v3
	net: emac: fix reset timeout with AR8035 phy
	perf tools: Decompress kernel module when reading DSO data
	perf tests: Decompress kernel module before objdump
	skbuff: only inherit relevant tx_flags
	xen: avoid type warning in xchg_xen_ulong
	X.509: Fix error code in x509_cert_parse()
	pinctrl: meson-gxbb: remove non-existing pin GPIOX_22
	coresight: Fix reference count for software sources
	coresight: tmc: Configure DMA mask appropriately
	stmmac: fix ptp header for GMAC3 hw timestamp
	geneve: add missing rx stats accounting
	crypto: omap-sham - buffer handling fixes for hashing later
	crypto: omap-sham - fix closing of hash with separate finalize call
	bnx2x: Allow vfs to disable txvlan offload
	sctp: fix recursive locking warning in sctp_do_peeloff
	net: fec: Add a fec_enet_clear_ethtool_stats() stub for CONFIG_M5272
	sparc64: ldc abort during vds iso boot
	iio: magnetometer: st_magn_spi: fix spi_device_id table
	net: ena: fix rare uncompleted admin command false alarm
	net: ena: fix race condition between submit and completion admin command
	net: ena: add missing return when ena_com_get_io_handlers() fails
	net: ena: add missing unmap bars on device removal
	net: ena: disable admin msix while working in polling mode
	clk: meson: meson8b: add compatibles for Meson8 and Meson8m2
	Bluetooth: Send HCI Set Event Mask Page 2 command only when needed
	cpuidle: dt: Add missing 'of_node_put()'
	ACPICA: OSL: Add support to exclude stdarg.h
	ACPICA: Events: Add runtime stub support for event APIs
	ACPICA: Disassembler: Abort on an invalid/unknown AML opcode
	s390/dasd: fix hanging safe offline
	vxlan: dont migrate permanent fdb entries during learn
	hsr: fix incorrect warning
	selftests: kselftest_harness: Fix compile warning
	drm/vc4: Fix resource leak in 'vc4_get_hang_state_ioctl()' in error handling path
	bcache: stop writeback thread after detaching
	bcache: segregate flash only volume write streams
	scsi: libsas: fix memory leak in sas_smp_get_phy_events()
	scsi: libsas: fix error when getting phy events
	scsi: libsas: initialize sas_phy status according to response of DISCOVER
	blk-mq: fix kernel oops in blk_mq_tag_idle()
	tty: n_gsm: Allow ADM response in addition to UA for control dlci
	EDAC, mv64x60: Fix an error handling path
	cxgb4vf: Fix SGE FL buffer initialization logic for 64K pages
	sdhci: Advertise 2.0v supply on SDIO host controller
	Input: goodix - disable IRQs while suspended
	mtd: mtd_oobtest: Handle bitflips during reads
	perf tools: Fix copyfile_offset update of output offset
	ipsec: check return value of skb_to_sgvec always
	rxrpc: check return value of skb_to_sgvec always
	virtio_net: check return value of skb_to_sgvec always
	virtio_net: check return value of skb_to_sgvec in one more location
	random: use lockless method of accessing and updating f->reg_idx
	clk: at91: fix clk-generated compilation
	arp: fix arp_filter on l3slave devices
	ipv6: the entire IPv6 header chain must fit the first fragment
	net: fix possible out-of-bound read in skb_network_protocol()
	net/ipv6: Fix route leaking between VRFs
	net/ipv6: Increment OUTxxx counters after netfilter hook
	netlink: make sure nladdr has correct size in netlink_connect()
	net/sched: fix NULL dereference in the error path of tcf_bpf_init()
	pptp: remove a buggy dst release in pptp_connect()
	r8169: fix setting driver_data after register_netdev
	sctp: do not leak kernel memory to user space
	sctp: sctp_sockaddr_af must check minimal addr length for AF_INET6
	sky2: Increase D3 delay to sky2 stops working after suspend
	vhost: correctly remove wait queue during poll failure
	vlan: also check phy_driver ts_info for vlan's real device
	bonding: fix the err path for dev hwaddr sync in bond_enslave
	bonding: move dev_mc_sync after master_upper_dev_link in bond_enslave
	bonding: process the err returned by dev_set_allmulti properly in bond_enslave
	net: fool proof dev_valid_name()
	ip_tunnel: better validate user provided tunnel names
	ipv6: sit: better validate user provided tunnel names
	ip6_gre: better validate user provided tunnel names
	ip6_tunnel: better validate user provided tunnel names
	vti6: better validate user provided tunnel names
	net/mlx5e: Sync netdev vxlan ports at open
	net/sched: fix NULL dereference in the error path of tunnel_key_init()
	net/sched: fix NULL dereference on the error path of tcf_skbmod_init()
	net/mlx4_en: Fix mixed PFC and Global pause user control requests
	vhost: validate log when IOTLB is enabled
	route: check sysctl_fib_multipath_use_neigh earlier than hash
	team: move dev_mc_sync after master_upper_dev_link in team_port_add
	vhost_net: add missing lock nesting notation
	net/mlx4_core: Fix memory leak while delete slave's resources
	strparser: Fix sign of err codes
	net sched actions: fix dumping which requires several messages to user space
	vrf: Fix use after free and double free in vrf_finish_output
	Revert "xhci: plat: Register shutdown for xhci_plat"
	Linux 4.9.94

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2018-04-14 15:40:56 +02:00
Daniel Bristot de Oliveira
0559ea3414 sched/deadline: Use the revised wakeup rule for suspending constrained dl tasks 
[ Upstream commit 3effcb4247 ]

We have been facing some problems with self-suspending constrained
deadline tasks. The main reason is that the original CBS was not
designed for such sort of tasks.

One problem reported by Xunlei Pang takes place when a task
suspends, and then is awakened before the deadline, but so close
to the deadline that its remaining runtime can cause the task
to have an absolute density higher than allowed. In such situation,
the original CBS assumes that the task is facing an early activation,
and so it replenishes the task and set another deadline, one deadline
in the future. This rule works fine for implicit deadline tasks.
Moreover, it allows the system to adapt the period of a task in which
the external event source suffered from a clock drift.

However, this opens the window for bandwidth leakage for constrained
deadline tasks. For instance, a task with the following parameters:

  runtime   = 5 ms
  deadline  = 7 ms
  [density] = 5 / 7 = 0.71
  period    = 1000 ms

If the task runs for 1 ms, and then suspends for another 1ms,
it will be awakened with the following parameters:

  remaining runtime = 4
  laxity = 5

presenting a absolute density of 4 / 5 = 0.80.

In this case, the original CBS would assume the task had an early
wakeup. Then, CBS will reset the runtime, and the absolute deadline will
be postponed by one relative deadline, allowing the task to run.

The problem is that, if the task runs this pattern forever, it will keep
receiving bandwidth, being able to run 1ms every 2ms. Following this
behavior, the task would be able to run 500 ms in 1 sec. Thus running
more than the 5 ms / 1 sec the admission control allowed it to run.

Trying to address the self-suspending case, Luca Abeni, Giuseppe
Lipari, and Juri Lelli [1] revisited the CBS in order to deal with
self-suspending tasks. In the new approach, rather than
replenishing/postponing the absolute deadline, the revised wakeup rule
adjusts the remaining runtime, reducing it to fit into the allowed
density.

A revised version of the idea is:

At a given time t, the maximum absolute density of a task cannot be
higher than its relative density, that is:

  runtime / (deadline - t) <= dl_runtime / dl_deadline

Knowing the laxity of a task (deadline - t), it is possible to move
it to the other side of the equality, thus enabling to define max
remaining runtime a task can use within the absolute deadline, without
over-running the allowed density:

  runtime = (dl_runtime / dl_deadline) * (deadline - t)

For instance, in our previous example, the task could still run:

  runtime = ( 5 / 7 ) * 5
  runtime = 3.57 ms

Without causing damage for other deadline tasks. It is note worthy
that the laxity cannot be negative because that would cause a negative
runtime. Thus, this patch depends on the patch:

  df8eac8caf ("sched/deadline: Throttle a constrained deadline task activated after the deadline")

Which throttles a constrained deadline task activated after the
deadline.

Finally, it is also possible to use the revised wakeup rule for
all other tasks, but that would require some more discussions
about pros and cons.

Reported-by: Xunlei Pang <xpang@redhat.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
[peterz: replaced dl_is_constrained with dl_is_implicit]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luca Abeni <luca.abeni@santannapisa.it>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Romulo Silva de Oliveira <romulo.deoliveira@ufsc.br>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tommaso Cucinotta <tommaso.cucinotta@sssup.it>
Link: http://lkml.kernel.org/r/5c800ab3a74a168a84ee5f3f84d12a02e11383be.1495803804.git.bristot@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-04-13 19:48:23 +02:00
Connor O'Brien
6e7b83d80b ANDROID: cpufreq: track per-task time in state 
Add time in state data to task structs, and create
/proc/<pid>/time_in_state files to show how long each individual task
has run at each frequency.
Create a CONFIG_CPU_FREQ_TIMES option to enable/disable this tracking.

Signed-off-by: Connor O'Brien <connoro@google.com>
Bug: 72339335
Bug: 70951257
Test: Read /proc/<pid>/time_in_state
Change-Id: Ia6456754f4cb1e83b2bc35efa8fbe9f8696febc8
 2018-04-03 11:15:30 -07:00
Greg Kroah-Hartman
960923fdc2 Merge 4.9.89 into android-4.9 
Changes in 4.9.89
	blkcg: fix double free of new_blkg in blkcg_init_queue
	Input: tsc2007 - check for presence and power down tsc2007 during probe
	perf stat: Issue a HW watchdog disable hint
	staging: speakup: Replace BUG_ON() with WARN_ON().
	staging: wilc1000: add check for kmalloc allocation failure.
	HID: reject input outside logical range only if null state is set
	drm: qxl: Don't alloc fbdev if emulation is not supported
	ARM: dts: r8a7791: Remove unit-address and reg from integrated cache
	ARM: dts: r8a7792: Remove unit-address and reg from integrated cache
	ARM: dts: r8a7793: Remove unit-address and reg from integrated cache
	ARM: dts: r8a7794: Remove unit-address and reg from integrated cache
	arm64: dts: r8a7796: Remove unit-address and reg from integrated cache
	drm/sun4i: Fix up error path cleanup for master bind function
	drm/sun4i: Set drm_crtc.port to the underlying TCON's output port node
	ath10k: fix a warning during channel switch with multiple vaps
	drm/sun4i: Fix TCON clock and regmap initialization sequence
	PCI/MSI: Stop disabling MSI/MSI-X in pci_device_shutdown()
	selinux: check for address length in selinux_socket_bind()
	x86/mm: Make mmap(MAP_32BIT) work correctly
	perf sort: Fix segfault with basic block 'cycles' sort dimension
	x86/mce: Handle broadcasted MCE gracefully with kexec
	eventpoll.h: fix epoll event masks
	i40e: Acquire NVM lock before reads on all devices
	i40e: fix ethtool to get EEPROM data from X722 interface
	perf tools: Make perf_event__synthesize_mmap_events() scale
	ARM: brcmstb: Enable ZONE_DMA for non 64-bit capable peripherals
	drivers: net: xgene: Fix hardware checksum setting
	drivers: net: phy: xgene: Fix mdio write
	drivers: net: xgene: Fix wrong logical operation
	drivers: net: xgene: Fix Rx checksum validation logic
	drm: Defer disabling the vblank IRQ until the next interrupt (for instant-off)
	ath10k: disallow DFS simulation if DFS channel is not enabled
	ath10k: fix fetching channel during potential radar detection
	usb: misc: lvs: fix race condition in disconnect handling
	ARM: bcm2835: Enable missing CMA settings for VC4 driver
	net: ethernet: bgmac: Allow MAC address to be specified in DTB
	netem: apply correct delay when rate throttling
	x86/mce: Init some CPU features early
	omapfb: dss: Handle return errors in dss_init_ports()
	perf probe: Fix concat_probe_trace_events
	perf probe: Return errno when not hitting any event
	HID: clamp input to logical range if no null state
	net/8021q: create device with all possible features in wanted_features
	ARM: dts: Adjust moxart IRQ controller and flags
	qed: Always publish VF link from leading hwfn
	s390/topology: fix typo in early topology code
	zd1211rw: fix NULL-deref at probe
	batman-adv: handle race condition for claims between gateways
	of: fix of_device_get_modalias returned length when truncating buffers
	solo6x10: release vb2 buffers in solo_stop_streaming()
	x86/boot/32: Defer resyncing initial_page_table until per-cpu is set up
	scsi: fnic: Fix for "Number of Active IOs" in fnicstats becoming negative
	scsi: ipr: Fix missed EH wakeup
	media: i2c/soc_camera: fix ov6650 sensor getting wrong clock
	timers, sched_clock: Update timeout for clock wrap
	sysrq: Reset the watchdog timers while displaying high-resolution timers
	Input: qt1070 - add OF device ID table
	sched: act_csum: don't mangle TCP and UDP GSO packets
	PCI: hv: Properly handle PCI bus remove
	PCI: hv: Lock PCI bus on device eject
	ASoC: rcar: ssi: don't set SSICR.CKDV = 000 with SSIWSR.CONT
	spi: omap2-mcspi: poll OMAP2_MCSPI_CHSTAT_RXS for PIO transfer
	tcp: sysctl: Fix a race to avoid unexpected 0 window from space
	dmaengine: imx-sdma: add 1ms delay to ensure SDMA channel is stopped
	usb: dwc3: make sure UX_EXIT_PX is cleared
	ARM: dts: bcm2835: add index to the ethernet alias
	perf annotate: Fix a bug following symbolic link of a build-id file
	perf buildid: Do not assume that readlink() returns a null terminated string
	i40e/i40evf: Fix use after free in Rx cleanup path
	scsi: be2iscsi: Check tag in beiscsi_mccq_compl_wait
	driver: (adm1275) set the m,b and R coefficients correctly for power
	bonding: make speed, duplex setting consistent with link state
	mm: Fix false-positive VM_BUG_ON() in page_cache_{get,add}_speculative()
	ALSA: firewire-lib: add a quirk of packet without valid EOH in CIP format
	ARM: dts: r8a7794: Add DU1 clock to device tree
	ARM: dts: r8a7794: Correct clock of DU1
	ARM: dts: silk: Correct clock of DU1
	blk-throttle: make sure expire time isn't too big
	regulator: core: Limit propagation of parent voltage count and list
	perf trace: Handle unpaired raw_syscalls:sys_exit event
	f2fs: relax node version check for victim data in gc
	drm/ttm: never add BO that failed to validate to the LRU list
	bonding: refine bond_fold_stats() wrap detection
	PCI: Apply Cavium ACS quirk only to CN81xx/CN83xx/CN88xx devices
	powerpc/mm/hugetlb: Filter out hugepage size not supported by page table layout
	braille-console: Fix value returned by _braille_console_setup
	drm/vmwgfx: Fixes to vmwgfx_fb
	vxlan: vxlan dev should inherit lowerdev's gso_max_size
	NFC: nfcmrvl: Include unaligned.h instead of access_ok.h
	NFC: nfcmrvl: double free on error path
	NFC: pn533: change order of free_irq and dev unregistration
	ARM: dts: r7s72100: fix ethernet clock parent
	ARM: dts: r8a7790: Correct parent of SSI[0-9] clocks
	ARM: dts: r8a7791: Correct parent of SSI[0-9] clocks
	ARM: dts: r8a7793: Correct parent of SSI[0-9] clocks
	powerpc: Avoid taking a data miss on every userspace instruction miss
	net: hns: Correct HNS RSS key set function
	net/faraday: Add missing include of of.h
	qed: Fix TM block ILT allocation
	rtmutex: Fix PI chain order integrity
	printk: Correctly handle preemption in console_unlock()
	drm: rcar-du: Handle event when disabling CRTCs
	ARM: dts: koelsch: Correct clock frequency of X2 DU clock input
	reiserfs: Make cancel_old_flush() reliable
	ASoC: rt5677: Add OF device ID table
	IB/hfi1: Check for QSFP presence before attempting reads
	ALSA: firewire-digi00x: add support for console models of Digi00x series
	ALSA: firewire-digi00x: handle all MIDI messages on streaming packets
	fm10k: correctly check if interface is removed
	EDAC, altera: Fix peripheral warnings for Cyclone5
	scsi: ses: don't get power status of SES device slot on probe
	qed: Correct MSI-x for storage
	apparmor: Make path_max parameter readonly
	iommu/iova: Fix underflow bug in __alloc_and_insert_iova_range
	kvm/svm: Setup MCG_CAP on AMD properly
	kvm: nVMX: Disallow userspace-injected exceptions in guest mode
	video: ARM CLCD: fix dma allocation size
	drm/radeon: Fail fb creation from imported dma-bufs.
	drm/amdgpu: Fail fb creation from imported dma-bufs. (v2)
	drm/rockchip: vop: Enable pm domain before vop_initial
	i40e: only register client on iWarp-capable devices
	coresight: Fixes coresight DT parse to get correct output port ID.
	lkdtm: turn off kcov for lkdtm_rodata_do_nothing:
	tty: amba-pl011: Fix spurious TX interrupts
	serial: imx: setup DCEDTE early and ensure DCD and RI irqs to be off
	MIPS: BPF: Quit clobbering callee saved registers in JIT code.
	MIPS: BPF: Fix multiple problems in JIT skb access helpers.
	MIPS: r2-on-r6-emu: Fix BLEZL and BGTZL identification
	MIPS: r2-on-r6-emu: Clear BLTZALL and BGEZALL debugfs counters
	v4l: vsp1: Prevent multiple streamon race commencing pipeline early
	v4l: vsp1: Register pipe with output WPF
	regulator: isl9305: fix array size
	md/raid6: Fix anomily when recovering a single device in RAID6.
	md.c:didn't unlock the mddev before return EINVAL in array_size_store
	powerpc/nohash: Fix use of mmu_has_feature() in setup_initial_memory_limit()
	usb: dwc2: Make sure we disconnect the gadget state
	usb: gadget: dummy_hcd: Fix wrong power status bit clear/reset in dummy_hub_control()
	perf evsel: Return exact sub event which failed with EPERM for wildcards
	iwlwifi: mvm: fix RX SKB header size and align it properly
	drivers/perf: arm_pmu: handle no platform_device
	perf inject: Copy events when reordering events in pipe mode
	net: fec: add phy-reset-gpios PROBE_DEFER check
	perf session: Don't rely on evlist in pipe mode
	vfio/powerpc/spapr_tce: Enforce IOMMU type compatibility check
	vfio/spapr_tce: Check kzalloc() return when preregistering memory
	scsi: sg: check for valid direction before starting the request
	scsi: sg: close race condition in sg_remove_sfp_usercontext()
	ALSA: hda: Add Geminilake id to SKL_PLUS
	kprobes/x86: Fix kprobe-booster not to boost far call instructions
	kprobes/x86: Set kprobes pages read-only
	pwm: tegra: Increase precision in PWM rate calculation
	clk: qcom: msm8996: Fix the vfe1 powerdomain name
	Bluetooth: Avoid bt_accept_unlink() double unlinking
	Bluetooth: 6lowpan: fix delay work init in add_peer_chan()
	mac80211_hwsim: use per-interface power level
	ath10k: fix compile time sanity check for CE4 buffer size
	wil6210: fix protection against connections during reset
	wil6210: fix memory access violation in wil_memcpy_from/toio_32
	perf stat: Fix bug in handling events in error state
	mwifiex: Fix invalid port issue
	drm/edid: set ELD connector type in drm_edid_to_eld()
	video/hdmi: Allow "empty" HDMI infoframes
	HID: elo: clear BTN_LEFT mapping
	iwlwifi: mvm: rs: don't override the rate history in the search cycle
	clk: meson: gxbb: fix wrong clock for SARADC/SANA
	ARM: dts: exynos: Correct Trats2 panel reset line
	sched: Stop switched_to_rt() from sending IPIs to offline CPUs
	sched: Stop resched_cpu() from sending IPIs to offline CPUs
	test_firmware: fix setting old custom fw path back on exit
	net: ieee802154: adf7242: Fix bug if defined DEBUG
	net: xfrm: allow clearing socket xfrm policies.
	mtd: nand: fix interpretation of NAND_CMD_NONE in nand_command[_lp]()
	net: thunderx: Set max queue count taking XDP_TX into account
	ARM: dts: am335x-pepper: Fix the audio CODEC's reset pin
	ARM: dts: omap3-n900: Fix the audio CODEC's reset pin
	mtd: nand: ifc: update bufnum mask for ver >= 2.0.0
	userns: Don't fail follow_automount based on s_user_ns
	leds: pm8058: Silence pointer to integer size warning
	power: supply: ab8500_charger: Fix an error handling path
	power: supply: ab8500_charger: Bail out in case of error in 'ab8500_charger_init_hw_registers()'
	ath10k: update tdls teardown state to target
	scsi: ses: don't ask for diagnostic pages repeatedly during probe
	pwm: stmpe: Fix wrong register offset for hwpwm=2 case
	clk: qcom: msm8916: fix mnd_width for codec_digcodec
	mwifiex: cfg80211: do not change virtual interface during scan processing
	ath10k: fix invalid STS_CAP_OFFSET_MASK
	tools/usbip: fixes build with musl libc toolchain
	spi: sun6i: disable/unprepare clocks on remove
	bnxt_en: Don't print "Link speed -1 no longer supported" messages.
	scsi: core: scsi_get_device_flags_keyed(): Always return device flags
	scsi: devinfo: apply to HP XP the same flags as Hitachi VSP
	scsi: dh: add new rdac devices
	media: vsp1: Prevent suspending and resuming DRM pipelines
	media: cpia2: Fix a couple off by one bugs
	veth: set peer GSO values
	drm/amdkfd: Fix memory leaks in kfd topology
	powerpc/modules: Don't try to restore r2 after a sibling call
	agp/intel: Flush all chipset writes after updating the GGTT
	mac80211_hwsim: enforce PS_MANUAL_POLL to be set after PS_ENABLED
	mac80211: remove BUG() when interface type is invalid
	ASoC: nuc900: Fix a loop timeout test
	ipvlan: add L2 check for packets arriving via virtual devices
	rcutorture/configinit: Fix build directory error message
	locking/locktorture: Fix num reader/writer corner cases
	ima: relax requiring a file signature for new files with zero length
	net: hns: Some checkpatch.pl script & warning fixes
	x86/boot/32: Fix UP boot on Quark and possibly other platforms
	x86/cpufeatures: Add Intel PCONFIG cpufeature
	selftests/x86/entry_from_vm86: Exit with 1 if we fail
	selftests/x86: Add tests for User-Mode Instruction Prevention
	selftests/x86: Add tests for the STR and SLDT instructions
	selftests/x86/entry_from_vm86: Add test cases for POPF
	x86/vm86/32: Fix POPF emulation
	x86/speculation, objtool: Annotate indirect calls/jumps for objtool on 32-bit kernels
	x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklist
	x86/mm: Fix vmalloc_fault to use pXd_large
	parisc: Handle case where flush_cache_range is called with no context
	ALSA: pcm: Fix UAF in snd_pcm_oss_get_formats()
	ALSA: hda - Revert power_save option default value
	ALSA: seq: Fix possible UAF in snd_seq_check_queue()
	ALSA: seq: Clear client entry before deleting else at closing
	drm/amdgpu: fix prime teardown order
	drm/amdgpu/dce: Don't turn off DP sink when disconnected
	fs: Teach path_connected to handle nfs filesystems with multiple roots.
	lock_parent() needs to recheck if dentry got __dentry_kill'ed under it
	fs/aio: Add explicit RCU grace period when freeing kioctx
	fs/aio: Use RCU accessors for kioctx_table->table[]
	irqchip/gic-v3-its: Ensure nr_ites >= nr_lpis
	scsi: sg: fix SG_DXFER_FROM_DEV transfers
	scsi: sg: fix static checker warning in sg_is_valid_dxfer
	scsi: sg: only check for dxfer_len greater than 256M
	btrfs: alloc_chunk: fix DUP stripe size handling
	btrfs: Fix use-after-free when cleaning up fs_devs with a single stale device
	scsi: qla2xxx: Fix extraneous ref on sp's after adapter break
	USB: gadget: udc: Add missing platform_device_put() on error in bdc_pci_probe()
	usb: dwc3: Fix GDBGFIFOSPACE_TYPE values
	usb: gadget: bdc: 64-bit pointer capability check
	Linux 4.9.89

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2018-03-22 09:54:47 +01:00
Paul E. McKenney
cce2b93fd3 sched: Stop resched_cpu() from sending IPIs to offline CPUs 
[ Upstream commit a0982dfa03 ]

The rcutorture test suite occasionally provokes a splat due to invoking
resched_cpu() on an offline CPU:

WARNING: CPU: 2 PID: 8 at /home/paulmck/public_git/linux-rcu/arch/x86/kernel/smp.c:128 native_smp_send_reschedule+0x37/0x40
Modules linked in:
CPU: 2 PID: 8 Comm: rcu_preempt Not tainted 4.14.0-rc4+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
task: ffff902ede9daf00 task.stack: ffff96c50010c000
RIP: 0010:native_smp_send_reschedule+0x37/0x40
RSP: 0018:ffff96c50010fdb8 EFLAGS: 00010096
RAX: 000000000000002e RBX: ffff902edaab4680 RCX: 0000000000000003
RDX: 0000000080000003 RSI: 0000000000000000 RDI: 00000000ffffffff
RBP: ffff96c50010fdb8 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 00000000299f36ae R12: 0000000000000001
R13: ffffffff9de64240 R14: 0000000000000001 R15: ffffffff9de64240
FS:  0000000000000000(0000) GS:ffff902edfc80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7d4c642 CR3: 000000001e0e2000 CR4: 00000000000006e0
Call Trace:
 resched_curr+0x8f/0x1c0
 resched_cpu+0x2c/0x40
 rcu_implicit_dynticks_qs+0x152/0x220
 force_qs_rnp+0x147/0x1d0
 ? sync_rcu_exp_select_cpus+0x450/0x450
 rcu_gp_kthread+0x5a9/0x950
 kthread+0x142/0x180
 ? force_qs_rnp+0x1d0/0x1d0
 ? kthread_create_on_node+0x40/0x40
 ret_from_fork+0x27/0x40
Code: 14 01 0f 92 c0 84 c0 74 14 48 8b 05 14 4f f4 00 be fd 00 00 00 ff 90 a0 00 00 00 5d c3 89 fe 48 c7 c7 38 89 ca 9d e8 e5 56 08 00 <0f> ff 5d c3 0f 1f 44 00 00 8b 05 52 9e 37 02 85 c0 75 38 55 48
---[ end trace 26df9e5df4bba4ac ]---

This splat cannot be generated by expedited grace periods because they
always invoke resched_cpu() on the current CPU, which is good because
expedited grace periods require that resched_cpu() unconditionally
succeed.  However, other parts of RCU can tolerate resched_cpu() acting
as a no-op, at least as long as it doesn't happen too often.

This commit therefore makes resched_cpu() invoke resched_curr() only if
the CPU is either online or is the current CPU.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>

Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-03-22 09:17:54 +01:00
Greg Kroah-Hartman
cdfc8df1d2 Merge 4.9.82 into android-4.9 
Changes in 4.9.82
	powerpc/pseries: include linux/types.h in asm/hvcall.h
	cifs: Fix missing put_xid in cifs_file_strict_mmap
	cifs: Fix autonegotiate security settings mismatch
	CIFS: zero sensitive data when freeing
	dmaengine: dmatest: fix container_of member in dmatest_callback
	kaiser: fix compile error without vsyscall
	posix-timer: Properly check sigevent->sigev_notify
	usb: gadget: uvc: Missing files for configfs interface
	sched/rt: Use container_of() to get root domain in rto_push_irq_work_func()
	sched/rt: Up the root domain ref count when passing it around via IPIs
	dccp: CVE-2017-8824: use-after-free in DCCP code
	media: dvb-usb-v2: lmedm04: Improve logic checking of warm start
	media: dvb-usb-v2: lmedm04: move ts2020 attach to dm04_lme2510_tuner
	media: hdpvr: Fix an error handling path in hdpvr_probe()
	mtd: cfi: convert inline functions to macros
	mtd: nand: brcmnand: Disable prefetch by default
	mtd: nand: Fix nand_do_read_oob() return value
	mtd: nand: sunxi: Fix ECC strength choice
	ubi: fastmap: Erase outdated anchor PEBs during attach
	ubi: block: Fix locking for idr_alloc/idr_remove
	ubifs: Massage assert in ubifs_xattr_set() wrt. init_xattrs
	nfs/pnfs: fix nfs_direct_req ref leak when i/o falls back to the mds
	NFS: Add a cond_resched() to nfs_commit_release_pages()
	NFS: commit direct writes even if they fail partially
	NFS: reject request for id_legacy key without auxdata
	NFS: Fix a race between mmap() and O_DIRECT
	kernfs: fix regression in kernfs_fop_write caused by wrong type
	ahci: Annotate PCI ids for mobile Intel chipsets as such
	ahci: Add PCI ids for Intel Bay Trail, Cherry Trail and Apollo Lake AHCI
	ahci: Add Intel Cannon Lake PCH-H PCI ID
	crypto: hash - introduce crypto_hash_alg_has_setkey()
	crypto: cryptd - pass through absence of ->setkey()
	crypto: mcryptd - pass through absence of ->setkey()
	crypto: poly1305 - remove ->setkey() method
	nsfs: mark dentry with DCACHE_RCUACCESS
	media: v4l2-ioctl.c: don't copy back the result for -ENOTTY
	media: v4l2-compat-ioctl32.c: add missing VIDIOC_PREPARE_BUF
	media: v4l2-compat-ioctl32.c: fix the indentation
	media: v4l2-compat-ioctl32.c: move 'helper' functions to __get/put_v4l2_format32
	media: v4l2-compat-ioctl32.c: avoid sizeof(type)
	media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32
	media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer
	media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs
	media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha
	media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32
	media: v4l2-compat-ioctl32.c: drop pr_info for unknown buffer type
	media: v4l2-compat-ioctl32.c: don't copy back the result for certain errors
	media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic
	crypto: caam - fix endless loop when DECO acquire fails
	crypto: sha512-mb - initialize pending lengths correctly
	arm: KVM: Fix SMCCC handling of unimplemented SMC/HVC calls
	KVM: nVMX: Fix races when sending nested PI while dest enters/leaves L2
	KVM: arm/arm64: Handle CPU_PM_ENTER_FAILED
	ASoC: rockchip: i2s: fix playback after runtime resume
	ASoC: skl: Fix kernel warning due to zero NHTL entry
	watchdog: imx2_wdt: restore previous timeout after suspend+resume
	media: dvb-frontends: fix i2c access helpers for KASAN
	media: ts2020: avoid integer overflows on 32 bit machines
	media: cxusb, dib0700: ignore XC2028_I2C_FLUSH
	fs/proc/kcore.c: use probe_kernel_read() instead of memcpy()
	kernel/async.c: revert "async: simplify lowest_in_progress()"
	kernel/relay.c: revert "kernel/relay.c: fix potential memory leak"
	pipe: actually allow root to exceed the pipe buffer limits
	pipe: fix off-by-one error when checking buffer limits
	HID: quirks: Fix keyboard + touchpad on Toshiba Click Mini not working
	Bluetooth: btsdio: Do not bind to non-removable BCM43341
	Revert "Bluetooth: btusb: fix QCA Rome suspend/resume"
	Bluetooth: btusb: Restore QCA Rome suspend/resume fix with a "rewritten" version
	signal/openrisc: Fix do_unaligned_access to send the proper signal
	signal/sh: Ensure si_signo is initialized in do_divide_error
	alpha: fix crash if pthread_create races with signal delivery
	alpha: fix reboot on Avanti platform
	alpha: fix formating of stack content
	xtensa: fix futex_atomic_cmpxchg_inatomic
	EDAC, octeon: Fix an uninitialized variable warning
	pinctrl: intel: Initialize GPIO properly when used through irqchip
	pktcdvd: Fix pkt_setup_dev() error path
	clocksource/drivers/stm32: Fix kernel panic with multiple timers
	lib/ubsan.c: s/missaligned/misaligned/
	lib/ubsan: add type mismatch handler for new GCC/Clang
	btrfs: Handle btrfs_set_extent_delalloc failure in fixup worker
	drm/i915: Avoid PPS HW/SW state mismatch due to rounding
	ACPI: sbshc: remove raw pointer from printk() message
	acpi, nfit: fix register dimm error handling
	ovl: fix failure to fsync lower dir
	mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy
	ftrace: Remove incorrect setting of glob search field
	Linux 4.9.82

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2018-02-17 14:52:07 +01:00
Steven Rostedt (VMware)
a384e5437f sched/rt: Up the root domain ref count when passing it around via IPIs 
commit 364f566537 upstream.

When issuing an IPI RT push, where an IPI is sent to each CPU that has more
than one RT task scheduled on it, it references the root domain's rto_mask,
that contains all the CPUs within the root domain that has more than one RT
task in the runable state. The problem is, after the IPIs are initiated, the
rq->lock is released. This means that the root domain that is associated to
the run queue could be freed while the IPIs are going around.

Add a sched_get_rd() and a sched_put_rd() that will increment and decrement
the root domain's ref count respectively. This way when initiating the IPIs,
the scheduler will up the root domain's ref count before releasing the
rq->lock, ensuring that the root domain does not go away until the IPI round
is complete.

Reported-by: Pavan Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 4bdced5c9a ("sched/rt: Simplify the IPI based RT balancing logic")
Link: http://lkml.kernel.org/r/CAEU1=PkiHO35Dzna8EQqNSKW1fr1y1zRQ5y66X117MG06sQtNA@mail.gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-02-17 13:21:13 +01:00
Victor Wan
2c95ea743b Merge branch 'android-4.9' into amlogic-4.9-dev 
Conflicts:
	arch/arm/configs/omap2plus_defconfig
	drivers/Makefile
	drivers/android/binder.c
 2018-01-08 18:44:19 +08:00
Joonwoo Park
4f0693ad08 sched: EAS: upmigrate misfit current task 
Upmigrate misfit current task upon scheduler tick with stopper.

We can kick an random (not necessarily big CPU) NOHZ idle CPU when a
CPU bound task is in need of upmigration.  But it's not efficient as that
way needs following unnecessary wakeups:

  1. Busy little CPU A to kick idle B
  2. B runs idle balancer and enqueue migration/A
  3. B goes idle
  4. A runs migration/A, enqueues busy task on B.
  5. B wakes up again.

This change makes active upmigration more efficiently by doing:

  1. Busy little CPU A find target CPU B upon tick.
  2. CPU A enqueues migration/A.

Change-Id: Ie865738054ea3296f28e6ba01710635efa7193c0
[joonwoop: The original version had logic to reserve CPU.  The logic is
 omitted in this version.]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
(cherry picked from commit 9e293db052)
[trivial cherry-pick issues]
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-12-01 16:11:45 +00:00
Srivatsa Vaddagiri
70e14af60c sched: Extend active balance to accept 'push_task' argument 
Active balance currently picks one task to migrate from busy cpu to
a chosen cpu (push_cpu). This patch extends active load balance to
recognize a particular task ('push_task') that needs to be migrated to
'push_cpu'. This capability will be leveraged by HMP-aware task
placement in a subsequent patch.

Change-Id: If31320111e6cc7044e617b5c3fd6d8e0c0e16952
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
[rameezmustafa@codeaurora.org]: Port to msm-3.18]
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
(cherry picked from commit 2da014c0d8)
[ trivial cherry-pick issues, fix "may be used uninitialized" warning
for push_task ]
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-12-01 16:11:25 +00:00
Joonwoo Park
7f17fff119 sched: WALT: account cumulative window demand 
Energy cost estimation has been a long lasting challenge for WALT
because WALT guides CPU frequency based on the CPU utilization of
previous window.  Consequently it's not possible to know newly
waking-up task's energy cost until WALT's end of the current window.

The WALT already tracks 'Previous Runnable Sum' (prev_runnable_sum)
and 'Cumulative Runnable Average' (cr_avg).  They are designed for
CPU frequency guidance and task placement but unfortunately both
are not suitable for the energy cost estimation.

It's because using prev_runnable_sum for energy cost calculation would
make us to account CPU and task's energy solely based on activity in the
previous window so for example, any task didn't have an activity in the
previous window will be accounted as a 'zero energy cost' task.
Energy estimation with cr_avg is what energy_diff() relies on at present.
However cr_avg can only represent instantaneous picture of energy cost
thus for example, if a CPU was fully occupied for an entire WALT window
and became idle just before window boundary, and if there is a wake-up,
energy_diff() accounts that CPU is a 'zero energy cost' CPU.

As a result, introduce a new accounting unit 'Cumulative Window Demand'.
The cumulative window demand tracks all the tasks' demands have seen in
current window which is neither instantaneous nor actual execution time.
Because task demand represents estimated scaled execution time when the
task runs a full window, accumulation of all the demands represents
predicted CPU load at the end of window.

Thus we can estimate CPU's frequency at the end of current WALT window
with the cumulative window demand.

The use of prev_runnable_sum for the CPU frequency guidance and cr_avg
for the task placement have not changed and these are going to be used
for both purpose while this patch aims to add an additional statistics.

Change-Id: I9908c77ead9973a26dea2b36c001c2baf944d4f5
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
(cherry picked from commit 43bd960dfe)
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-12-01 16:11:06 +00:00
Joonwoo Park
6cb3bed2d0 sched: EAS/WALT: finish accounting prior to task_tick 
In order to set rq->misfit_task in time, call update_task_ravg() prior
to task_tick.  This reduces upmigration delay by 1 scheduler window.

Change-Id: I7cc80badd423f2e7684125fbfd853b0a3610f0e8
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
(cherry picked from commit ed9e749668)
[Trivial cherry-pick issue]
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-12-01 16:10:56 +00:00
Vikram Mulukutla
b28cab9cd2 sched: walt: Leverage existing helper APIs to apply invariance 
There's no need for a separate hierarchy of notifiers, APIs
and variables in walt.c for the purpose of applying frequency
and IPC invariance. Let's just use capacity_curr_of and get
rid of a lot of the infrastructure relating to capacity,
load_scale_factor etc.

Change-Id: Ia220e2c896373fa535db05bff60f9aa33aefc978
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
(cherry picked from commit be832f69a9)
[Trivial cherry pick issues]
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-12-01 16:10:25 +00:00
Greg Kroah-Hartman
c1a286429a Merge 4.9.66 into android-4.9 
Changes in 4.9.66
	s390: fix transactional execution control register handling
	s390/runtime instrumention: fix possible memory corruption
	s390/disassembler: add missing end marker for e7 table
	s390/disassembler: increase show_code buffer size
	ACPI / EC: Fix regression related to triggering source of EC event handling
	x86/mm: fix use-after-free of vma during userfaultfd fault
	ipv6: only call ip6_route_dev_notify() once for NETDEV_UNREGISTER
	vsock: use new wait API for vsock_stream_sendmsg()
	sched: Make resched_cpu() unconditional
	lib/mpi: call cond_resched() from mpi_powm() loop
	x86/decoder: Add new TEST instruction pattern
	x86/entry/64: Add missing irqflags tracing to native_load_gs_index()
	arm64: Implement arch-specific pte_access_permitted()
	ARM: 8722/1: mm: make STRICT_KERNEL_RWX effective for LPAE
	ARM: 8721/1: mm: dump: check hardware RO bit for LPAE
	MIPS: ralink: Fix MT7628 pinmux
	MIPS: ralink: Fix typo in mt7628 pinmux function
	PCI: Set Cavium ACS capability quirk flags to assert RR/CR/SV/UF
	ALSA: hda: Add Raven PCI ID
	dm bufio: fix integer overflow when limiting maximum cache size
	dm: allocate struct mapped_device with kvzalloc
	MIPS: pci: Remove KERN_WARN instance inside the mt7620 driver
	dm: fix race between dm_get_from_kobject() and __dm_destroy()
	MIPS: Fix odd fp register warnings with MIPS64r2
	MIPS: dts: remove bogus bcm96358nb4ser.dtb from dtb-y entry
	MIPS: Fix an n32 core file generation regset support regression
	MIPS: BCM47XX: Fix LED inversion for WRT54GSv1
	rt2x00usb: mark device removed when get ENOENT usb error
	autofs: don't fail mount for transient error
	nilfs2: fix race condition that causes file system corruption
	eCryptfs: use after free in ecryptfs_release_messaging()
	libceph: don't WARN() if user tries to add invalid key
	bcache: check ca->alloc_thread initialized before wake up it
	isofs: fix timestamps beyond 2027
	NFS: Fix typo in nomigration mount option
	nfs: Fix ugly referral attributes
	NFS: Avoid RCU usage in tracepoints
	nfsd: deal with revoked delegations appropriately
	rtlwifi: rtl8192ee: Fix memory leak when loading firmware
	rtlwifi: fix uninitialized rtlhal->last_suspend_sec time
	ata: fixes kernel crash while tracing ata_eh_link_autopsy event
	ext4: fix interaction between i_size, fallocate, and delalloc after a crash
	ALSA: pcm: update tstamp only if audio_tstamp changed
	ALSA: usb-audio: Add sanity checks to FE parser
	ALSA: usb-audio: Fix potential out-of-bound access at parsing SU
	ALSA: usb-audio: Add sanity checks in v2 clock parsers
	ALSA: timer: Remove kernel warning at compat ioctl error paths
	ALSA: hda: Fix too short HDMI/DP chmap reporting
	ALSA: hda/realtek - Fix ALC700 family no sound issue
	fix a page leak in vhost_scsi_iov_to_sgl() error recovery
	fs/9p: Compare qid.path in v9fs_test_inode
	iscsi-target: Fix non-immediate TMR reference leak
	target: Fix QUEUE_FULL + SCSI task attribute handling
	mtd: nand: omap2: Fix subpage write
	mtd: nand: Fix writing mtdoops to nand flash.
	mtd: nand: mtk: fix infinite ECC decode IRQ issue
	p54: don't unregister leds when they are not initialized
	block: Fix a race between blk_cleanup_queue() and timeout handling
	irqchip/gic-v3: Fix ppi-partitions lookup
	lockd: double unregister of inetaddr notifiers
	KVM: nVMX: set IDTR and GDTR limits when loading L1 host state
	KVM: SVM: obey guest PAT
	SUNRPC: Fix tracepoint storage issues with svc_recv and svc_rqst_status
	clk: ti: dra7-atl-clock: fix child-node lookups
	libnvdimm, pfn: make 'resource' attribute only readable by root
	libnvdimm, namespace: fix label initialization to use valid seq numbers
	libnvdimm, namespace: make 'resource' attribute only readable by root
	IB/srpt: Do not accept invalid initiator port names
	IB/srp: Avoid that a cable pull can trigger a kernel crash
	NFC: fix device-allocation error return
	i40e: Use smp_rmb rather than read_barrier_depends
	igb: Use smp_rmb rather than read_barrier_depends
	igbvf: Use smp_rmb rather than read_barrier_depends
	ixgbevf: Use smp_rmb rather than read_barrier_depends
	i40evf: Use smp_rmb rather than read_barrier_depends
	fm10k: Use smp_rmb rather than read_barrier_depends
	ixgbe: Fix skb list corruption on Power systems
	parisc: Fix validity check of pointer size argument in new CAS implementation
	powerpc/signal: Properly handle return value from uprobe_deny_signal()
	media: Don't do DMA on stack for firmware upload in the AS102 driver
	media: rc: check for integer overflow
	cx231xx-cards: fix NULL-deref on missing association descriptor
	media: v4l2-ctrl: Fix flags field on Control events
	sched/rt: Simplify the IPI based RT balancing logic
	fscrypt: lock mutex before checking for bounce page pool
	net/9p: Switch to wait_event_killable()
	PM / OPP: Add missing of_node_put(np)
	Revert "drm/i915: Do not rely on wm preservation for ILK watermarks"
	e1000e: Fix error path in link detection
	e1000e: Fix return value test
	e1000e: Separate signaling for link check/link up
	e1000e: Avoid receiver overrun interrupt bursts
	RDS: make message size limit compliant with spec
	RDS: RDMA: return appropriate error on rdma map failures
	RDS: RDMA: fix the ib_map_mr_sg_zbva() argument
	PCI: Apply _HPX settings only to relevant devices
	drm/sun4i: Fix a return value in case of error
	clk: sunxi-ng: A31: Fix spdif clock register
	clk: sunxi-ng: fix PLL_CPUX adjusting on A33
	dmaengine: zx: set DMA_CYCLIC cap_mask bit
	fscrypt: use ENOKEY when file cannot be created w/o key
	fscrypt: use ENOTDIR when setting encryption policy on nondirectory
	net: Allow IP_MULTICAST_IF to set index to L3 slave
	net: 3com: typhoon: typhoon_init_one: make return values more specific
	net: 3com: typhoon: typhoon_init_one: fix incorrect return values
	drm/armada: Fix compile fail
	rt2800: set minimum MPDU and PSDU lengths to sane values
	adm80211: return an error if adm8211_alloc_rings() fails
	mwifiex: sdio: fix use after free issue for save_adapter
	ath10k: fix incorrect txpower set by P2P_DEVICE interface
	ath10k: ignore configuring the incorrect board_id
	ath10k: fix potential memory leak in ath10k_wmi_tlv_op_pull_fw_stats()
	pinctrl: sirf: atlas7: Add missing 'of_node_put()'
	bnxt_en: Set default completion ring for async events.
	ath10k: set CTS protection VDEV param only if VDEV is up
	ALSA: hda - Apply ALC269_FIXUP_NO_SHUTUP on HDA_FIXUP_ACT_PROBE
	gpio: mockup: dynamically allocate memory for chip name
	drm: Apply range restriction after color adjustment when allocation
	clk: qcom: ipq4019: Add all the frequencies for apss cpu
	drm/mediatek: don't use drm_put_dev
	mac80211: Remove invalid flag operations in mesh TSF synchronization
	mac80211: Suppress NEW_PEER_CANDIDATE event if no room
	adm80211: add checks for dma mapping errors
	iio: light: fix improper return value
	staging: iio: cdc: fix improper return value
	spi: SPI_FSL_DSPI should depend on HAS_DMA
	netfilter: nft_queue: use raw_smp_processor_id()
	netfilter: nf_tables: fix oob access
	ASoC: rsnd: don't double free kctrl
	crypto: marvell - Copy IVDIG before launching partial DMA ahash requests
	btrfs: return the actual error value from from btrfs_uuid_tree_iterate
	ASoC: wm_adsp: Don't overrun firmware file buffer when reading region data
	s390/kbuild: enable modversions for symbols exported from asm
	cec: when canceling a message, don't overwrite old status info
	cec: CEC_MSG_GIVE_FEATURES should abort for CEC version < 2
	cec: update log_addr[] before finishing configuration
	nvmet: fix KATO offset in Set Features
	xen: xenbus driver must not accept invalid transaction ids
	Linux 4.9.66

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2017-11-30 16:24:14 +00:00
Steven Rostedt (Red Hat)
1c37ff7829 sched/rt: Simplify the IPI based RT balancing logic 
commit 4bdced5c9a upstream.

When a CPU lowers its priority (schedules out a high priority task for a
lower priority one), a check is made to see if any other CPU has overloaded
RT tasks (more than one). It checks the rto_mask to determine this and if so
it will request to pull one of those tasks to itself if the non running RT
task is of higher priority than the new priority of the next task to run on
the current CPU.

When we deal with large number of CPUs, the original pull logic suffered
from large lock contention on a single CPU run queue, which caused a huge
latency across all CPUs. This was caused by only having one CPU having
overloaded RT tasks and a bunch of other CPUs lowering their priority. To
solve this issue, commit:

  b6366f048e ("sched/rt: Use IPI to trigger RT task push migration instead of pulling")

changed the way to request a pull. Instead of grabbing the lock of the
overloaded CPU's runqueue, it simply sent an IPI to that CPU to do the work.

Although the IPI logic worked very well in removing the large latency build
up, it still could suffer from a large number of IPIs being sent to a single
CPU. On a 80 CPU box, I measured over 200us of processing IPIs. Worse yet,
when I tested this on a 120 CPU box, with a stress test that had lots of
RT tasks scheduling on all CPUs, it actually triggered the hard lockup
detector! One CPU had so many IPIs sent to it, and due to the restart
mechanism that is triggered when the source run queue has a priority status
change, the CPU spent minutes! processing the IPIs.

Thinking about this further, I realized there's no reason for each run queue
to send its own IPI. As all CPUs with overloaded tasks must be scanned
regardless if there's one or many CPUs lowering their priority, because
there's no current way to find the CPU with the highest priority task that
can schedule to one of these CPUs, there really only needs to be one IPI
being sent around at a time.

This greatly simplifies the code!

The new approach is to have each root domain have its own irq work, as the
rto_mask is per root domain. The root domain has the following fields
attached to it:

  rto_push_work	 - the irq work to process each CPU set in rto_mask
  rto_lock	 - the lock to protect some of the other rto fields
  rto_loop_start - an atomic that keeps contention down on rto_lock
		    the first CPU scheduling in a lower priority task
		    is the one to kick off the process.
  rto_loop_next	 - an atomic that gets incremented for each CPU that
		    schedules in a lower priority task.
  rto_loop	 - a variable protected by rto_lock that is used to
		    compare against rto_loop_next
  rto_cpu	 - The cpu to send the next IPI to, also protected by
		    the rto_lock.

When a CPU schedules in a lower priority task and wants to make sure
overloaded CPUs know about it. It increments the rto_loop_next. Then it
atomically sets rto_loop_start with a cmpxchg. If the old value is not "0",
then it is done, as another CPU is kicking off the IPI loop. If the old
value is "0", then it will take the rto_lock to synchronize with a possible
IPI being sent around to the overloaded CPUs.

If rto_cpu is greater than or equal to nr_cpu_ids, then there's either no
IPI being sent around, or one is about to finish. Then rto_cpu is set to the
first CPU in rto_mask and an IPI is sent to that CPU. If there's no CPUs set
in rto_mask, then there's nothing to be done.

When the CPU receives the IPI, it will first try to push any RT tasks that is
queued on the CPU but can't run because a higher priority RT task is
currently running on that CPU.

Then it takes the rto_lock and looks for the next CPU in the rto_mask. If it
finds one, it simply sends an IPI to that CPU and the process continues.

If there's no more CPUs in the rto_mask, then rto_loop is compared with
rto_loop_next. If they match, everything is done and the process is over. If
they do not match, then a CPU scheduled in a lower priority task as the IPI
was being passed around, and the process needs to start again. The first CPU
in rto_mask is sent the IPI.

This change removes this duplication of work in the IPI logic, and greatly
lowers the latency caused by the IPIs. This removed the lockup happening on
the 120 CPU machine. It also simplifies the code tremendously. What else
could anyone ask for?

Thanks to Peter Zijlstra for simplifying the rto_loop_start atomic logic and
supplying me with the rto_start_trylock() and rto_start_unlock() helper
functions.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Clark Williams <williams@redhat.com>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Scott Wood <swood@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170424114732.1aac6dc4@gandalf.local.home
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2017-11-30 08:39:09 +00:00
Paul E. McKenney
fb8bd56e35 sched: Make resched_cpu() unconditional 
commit 7c2102e56a upstream.

The current implementation of synchronize_sched_expedited() incorrectly
assumes that resched_cpu() is unconditional, which it is not.  This means
that synchronize_sched_expedited() can hang when resched_cpu()'s trylock
fails as follows (analysis by Neeraj Upadhyay):

o	CPU1 is waiting for expedited wait to complete:

	sync_rcu_exp_select_cpus
	     rdp->exp_dynticks_snap & 0x1   // returns 1 for CPU5
	     IPI sent to CPU5

	synchronize_sched_expedited_wait
		 ret = swait_event_timeout(rsp->expedited_wq,
					   sync_rcu_preempt_exp_done(rnp_root),
					   jiffies_stall);

	expmask = 0x20, CPU 5 in idle path (in cpuidle_enter())

o	CPU5 handles IPI and fails to acquire rq lock.

	Handles IPI
	     sync_sched_exp_handler
		 resched_cpu
		     returns while failing to try lock acquire rq->lock
		 need_resched is not set

o	CPU5 calls  rcu_idle_enter() and as need_resched is not set, goes to
	idle (schedule() is not called).

o	CPU 1 reports RCU stall.

Given that resched_cpu() is now used only by RCU, this commit fixes the
assumption by making resched_cpu() unconditional.

Reported-by: Neeraj Upadhyay <neeraju@codeaurora.org>
Suggested-by: Neeraj Upadhyay <neeraju@codeaurora.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2017-11-30 08:39:01 +00:00
Greg Kroah-Hartman
a6d71ba679 Merge 4.9.62 into android-4.9 
Changes in 4.9.62
	adv7604: Initialize drive strength to default when using DT
	video: fbdev: pmag-ba-fb: Remove bad `__init' annotation
	PCI: mvebu: Handle changes to the bridge windows while enabled
	sched/core: Add missing update_rq_clock() call in sched_move_task()
	xen/netback: set default upper limit of tx/rx queues to 8
	ARM: dts: imx53-qsb-common: fix FEC pinmux config
	dt-bindings: clockgen: Add compatible string for LS1012A
	EDAC, amd64: Add x86cpuid sanity check during init
	PM / OPP: Error out on failing to add static OPPs for v1 bindings
	clk: samsung: exynos5433: Add IDs for PHYCLK_MIPIDPHY0_* clocks
	drm: drm_minor_register(): Clean up debugfs on failure
	KVM: PPC: Book 3S: XICS: correct the real mode ICP rejecting counter
	iommu/arm-smmu-v3: Clear prior settings when updating STEs
	pinctrl: baytrail: Fix debugfs offset output
	powerpc/corenet: explicitly disable the SDHC controller on kmcoge4
	cxl: Force psl data-cache flush during device shutdown
	ARM: omap2plus_defconfig: Fix probe errors on UARTs 5 and 6
	arm64: dma-mapping: Only swizzle DMA ops for IOMMU_DOMAIN_DMA
	crypto: vmx - disable preemption to enable vsx in aes_ctr.c
	drm: mali-dp: fix Lx_CONTROL register fields clobber
	iio: trigger: free trigger resource correctly
	iio: pressure: ms5611: claim direct mode during oversampling changes
	iio: magnetometer: mag3110: claim direct mode during raw writes
	iio: proximity: sx9500: claim direct mode during raw proximity reads
	dt-bindings: Add LEGO MINDSTORMS EV3 compatible specification
	dt-bindings: Add vendor prefix for LEGO
	phy: increase size of MII_BUS_ID_SIZE and bus_id
	serial: sh-sci: Fix register offsets for the IRDA serial port
	libertas: fix improper return value
	usb: hcd: initialize hcd->flags to 0 when rm hcd
	netfilter: nft_meta: deal with PACKET_LOOPBACK in netdev family
	brcmfmac: setup wiphy bands after registering it first
	rt2800usb: mark tx failure on timeout
	apparmor: fix undefined reference to `aa_g_hash_policy'
	IPsec: do not ignore crypto err in ah4 input
	EDAC, amd64: Save and return err code from probe_one_instance()
	s390/topology: make "topology=off" parameter work
	Input: mpr121 - handle multiple bits change of status register
	Input: mpr121 - set missing event capability
	sched/cputime, powerpc32: Fix stale scaled stime on context switch
	IB/ipoib: Change list_del to list_del_init in the tx object
	ARM: dts: STiH410-family: fix wrong parent clock frequency
	s390/qeth: fix retrieval of vipa and proxy-arp addresses
	s390/qeth: issue STARTLAN as first IPA command
	wcn36xx: Don't use the destroyed hal_mutex
	IB/rxe: Fix reference leaks in memory key invalidation code
	clk: mvebu: adjust AP806 CPU clock frequencies to production chip
	net: dsa: select NET_SWITCHDEV
	platform/x86: hp-wmi: Fix detection for dock and tablet mode
	cdc_ncm: Set NTB format again after altsetting switch for Huawei devices
	KEYS: trusted: sanitize all key material
	KEYS: trusted: fix writing past end of buffer in trusted_read()
	platform/x86: hp-wmi: Fix error value for hp_wmi_tablet_state
	platform/x86: hp-wmi: Do not shadow error values
	x86/uaccess, sched/preempt: Verify access_ok() context
	workqueue: Fix NULL pointer dereference
	crypto: ccm - preserve the IV buffer
	crypto: x86/sha1-mb - fix panic due to unaligned access
	crypto: x86/sha256-mb - fix panic due to unaligned access
	KEYS: fix NULL pointer dereference during ASN.1 parsing [ver #2]
	ARM: 8720/1: ensure dump_instr() checks addr_limit
	ALSA: seq: Fix OSS sysex delivery in OSS emulation
	ALSA: seq: Avoid invalid lockdep class warning
	drm/i915: Do not rely on wm preservation for ILK watermarks
	MIPS: microMIPS: Fix incorrect mask in insn_table_MM
	MIPS: Fix CM region target definitions
	MIPS: SMP: Use a completion event to signal CPU up
	MIPS: Fix race on setting and getting cpu_online_mask
	MIPS: SMP: Fix deadlock & online race
	selftests: firmware: send expected errors to /dev/null
	tools: firmware: check for distro fallback udev cancel rule
	ASoC: sun4i-spdif: remove legacy dapm components
	MIPS: BMIPS: Fix missing cbr address
	MIPS: AR7: Defer registration of GPIO
	MIPS: AR7: Ensure that serial ports are properly set up
	Input: elan_i2c - add ELAN060C to the ACPI table
	rbd: use GFP_NOIO for parent stat and data requests
	drm/vmwgfx: Fix Ubuntu 17.10 Wayland black screen issue
	drm/bridge: adv7511: Rework adv7511_power_on/off() so they can be reused internally
	drm/bridge: adv7511: Reuse __adv7511_power_on/off() when probing EDID
	drm/bridge: adv7511: Re-write the i2c address before EDID probing
	can: sun4i: handle overrun in RX FIFO
	can: ifi: Fix transmitter delay calculation
	can: c_can: don't indicate triple sampling support for D_CAN
	x86/smpboot: Make optimization of delay calibration work correctly
	x86/oprofile/ppro: Do not use __this_cpu*() in preemptible context
	Linux 4.9.62

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2017-11-15 16:13:49 +01:00
Peter Zijlstra
6da1c989cc sched/core: Add missing update_rq_clock() call in sched_move_task() 
[ Upstream commit 1b1d62254d ]

Bug was noticed via this warning:

  WARNING: CPU: 6 PID: 1 at kernel/sched/sched.h:804 detach_task_cfs_rq+0x8e8/0xb80
  rq->clock_update_flags < RQCF_ACT_SKIP
  Modules linked in:
  CPU: 6 PID: 1 Comm: systemd Not tainted 4.10.0-rc5-00140-g0874170baf55-dirty #1
  Hardware name: Supermicro SYS-4048B-TRFT/X10QBi, BIOS 1.0 04/11/2014
  Call Trace:
   dump_stack+0x4d/0x65
   __warn+0xcb/0xf0
   warn_slowpath_fmt+0x5f/0x80
   detach_task_cfs_rq+0x8e8/0xb80
   ? allocate_cgrp_cset_links+0x59/0x80
   task_change_group_fair+0x27/0x150
   sched_change_group+0x48/0xf0
   sched_move_task+0x53/0x150
   cpu_cgroup_attach+0x36/0x70
   cgroup_taskset_migrate+0x175/0x300
   cgroup_migrate+0xab/0xd0
   cgroup_attach_task+0xf0/0x190
   __cgroup_procs_write+0x1ed/0x2f0
   cgroup_procs_write+0x14/0x20
   cgroup_file_write+0x3f/0x100
   kernfs_fop_write+0x104/0x180
   __vfs_write+0x37/0x140
   vfs_write+0xb8/0x1b0
   SyS_write+0x55/0xc0
   do_syscall_64+0x61/0x170
   entry_SYSCALL64_slow_path+0x25/0x25

Reported-by: Ingo Molnar <mingo@kernel.org>
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2017-11-15 15:53:11 +01:00
Olav Haugan
77ba2b9f0b sched: Update task->on_rq when tasks are moving between runqueues 
Task->on_rq has three states:
	0 - Task is not on runqueue (rq)
	1 (TASK_ON_RQ_QUEUED) - Task is on rq
	2 (TASK_ON_RQ_MIGRATING) - Task is on rq but in the
	process of being migrated to another rq

When a task is moving between rqs task->on_rq state should be
TASK_ON_RQ_MIGRATING in order for WALT to account rq's cumulative
runnable average correctly.  Without such state marking for all the
classes, WALT's update_history() would try to fixup task's demand
which was never contributed to any of CPUs during migration.

Change-Id: I65e74a8f176c3ed4b8577577f6da8897ecda7bb8
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
[joonwoop: Reinforced changelog to explain why this is needed by WALT.
           Fixed conflicts in deadline.c]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
(cherry picked from commit 0f8791c90a99f718c43ab8214076c0c671a36667)
[fixed cherry-pick issue due to missing fab5cc59bf]
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-11-14 16:39:00 +00:00
Victor Wan
ee46236755 Merge branch 'android-4.9' into amlogic-4.9-dev 2017-11-14 17:18:44 +08:00
Viresh Kumar
e0907557ef cpufreq: Drop schedfreq governor 
We all should be using (and improving) the schedutil governor now. Get
rid of the non-upstream governor.

Tested on Hikey.

Change-Id: I2104558b03118b0a9c5f099c23c42cd9a6c2a963
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
 2017-11-07 10:31:04 +05:30
Peter Zijlstra
350e127dae UPSTREAM: sched/core: Add missing update_rq_clock() call in set_user_nice() 
Address this rq-clock update bug:

  WARNING: CPU: 30 PID: 195 at ../kernel/sched/sched.h:797 set_next_entity()
  rq->clock_update_flags < RQCF_ACT_SKIP

  Call Trace:
    dump_stack()
    __warn()
    warn_slowpath_fmt()
    set_next_entity()
    ? _raw_spin_lock()
    set_curr_task_fair()
    set_user_nice.part.85()
    set_user_nice()
    create_worker()
    worker_thread()
    kthread()
    ret_from_fork()

Change-Id: I8fb2653b2d9cb3bbc1637c1bcbf1c0645752ef12
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 2fb8d36787)
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-11-02 18:21:38 +00:00
Peter Zijlstra
7c4e0f0832 UPSTREAM: sched/core: Add missing update_rq_clock() in detach_task_cfs_rq() 
Instead of adding the update_rq_clock() all the way at the bottom of
the callstack, add one at the top, this to aid later effort to
minimize update_rq_lock() calls.

  WARNING: CPU: 0 PID: 1 at ../kernel/sched/sched.h:797 detach_task_cfs_rq()
  rq->clock_update_flags < RQCF_ACT_SKIP

  Call Trace:
    dump_stack()
    __warn()
    warn_slowpath_fmt()
    detach_task_cfs_rq()
    switched_from_fair()
    __sched_setscheduler()
    _sched_setscheduler()
    sched_set_stop_task()
    cpu_stop_create()
    __smpboot_create_thread.part.2()
    smpboot_register_percpu_thread_cpumask()
    cpu_stop_init()
    do_one_initcall()
    ? print_cpu_info()
    kernel_init_freeable()
    ? rest_init()
    kernel_init()
    ret_from_fork()

Change-Id: Iee08c2ed3303ae8f0c527658f13646b02a412cad
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 80f5c1b84b)
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-11-02 18:20:28 +00:00
Peter Zijlstra
4b9300bf83 UPSTREAM: sched/core: Add missing update_rq_clock() in post_init_entity_util_avg() 
Address this rq-clock update bug:

  WARNING: CPU: 0 PID: 0 at ../kernel/sched/sched.h:797 post_init_entity_util_avg()
  rq->clock_update_flags < RQCF_ACT_SKIP

  Call Trace:
    __warn()
    post_init_entity_util_avg()
    wake_up_new_task()
    _do_fork()
    kernel_thread()
    rest_init()
    start_kernel()

Change-Id: I0d8b0c83b19447dc53ebd397bb14f756cb97d8a3
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 4126bad671)
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-11-02 18:20:00 +00:00
Chris Redpath
d870d26fb3 cpufreq/sched: Consider max cpu capacity when choosing frequencies 
When using schedfreq on cpus with max capacity significantly smaller than
1024, the tick update uses non-normalised capacities - this leads to
selecting an incorrect OPP as we were scaling the frequency as if the
max capacity achievable was 1024 rather than the max for that particular
cpu or group. This could result in a cpu being stuck at the lowest OPP
and unable to generate enough utilisation to climb out if the max
capacity is significantly smaller than 1024.

Instead, normalize the capacity to be in the range 0-1024 in the tick
so that when we later select a frequency, we get the correct one.

Also comments updated to be clearer about what is needed.

Change-Id: Id84391c7ac015311002ada21813a353ee13bee60
Signed-off-by: Chris Redpath <chris.redpath@arm.com>
(cherry picked from commit bc3b0db024f3d0b323e7d93994655e9e3d9f8d68)
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-11-02 11:15:14 -07:00
Greg Kroah-Hartman
f108c7d9b5 Merge 4.9.58 into android-4.9 
Changes in 4.9.58
	MIPS: Fix minimum alignment requirement of IRQ stack
	Revert "bsg-lib: don't free job in bsg_prepare_job"
	xen-netback: Use GFP_ATOMIC to allocate hash
	locking/lockdep: Add nest_lock integrity test
	watchdog: kempld: fix gcc-4.3 build
	irqchip/crossbar: Fix incorrect type of local variables
	initramfs: finish fput() before accessing any binary from initramfs
	mac80211_hwsim: check HWSIM_ATTR_RADIO_NAME length
	ALSA: hda: Add Geminilake HDMI codec ID
	qed: Don't use attention PTT for configuring BW
	mac80211: fix power saving clients handling in iwlwifi
	net/mlx4_en: fix overflow in mlx4_en_init_timestamp()
	staging: vchiq_2835_arm: Make cache-line-size a required DT property
	netfilter: nf_ct_expect: Change __nf_ct_expect_check() return value.
	iio: adc: xilinx: Fix error handling
	f2fs: do SSR for data when there is enough free space
	sched/fair: Update rq clock before changing a task's CPU affinity
	Btrfs: send, fix failure to rename top level inode due to name collision
	f2fs: do not wait for writeback in write_begin
	md/linear: shutup lockdep warnning
	sparc64: Migrate hvcons irq to panicked cpu
	net/mlx4_core: Fix VF overwrite of module param which disables DMFS on new probed PFs
	crypto: xts - Add ECB dependency
	mm/memory_hotplug: set magic number to page->freelist instead of page->lru.next
	ocfs2/dlmglue: prepare tracking logic to avoid recursive cluster lock
	slub: do not merge cache if slub_debug contains a never-merge flag
	scsi: scsi_dh_emc: return success in clariion_std_inquiry()
	ASoC: mediatek: add I2C dependency for CS42XX8
	drm/amdgpu: refuse to reserve io mem for split VRAM buffers
	net: mvpp2: release reference to txq_cpu[] entry after unmapping
	qede: Prevent index problems in loopback test
	qed: Reserve doorbell BAR space for present CPUs
	qed: Read queue state before releasing buffer
	i2c: at91: ensure state is restored after suspending
	ceph: don't update_dentry_lease unless we actually got one
	ceph: fix bogus endianness change in ceph_ioctl_set_layout
	ceph: clean up unsafe d_parent accesses in build_dentry_path
	uapi: fix linux/rds.h userspace compilation errors
	uapi: fix linux/mroute6.h userspace compilation errors
	IB/hfi1: Use static CTLE with Preset 6 for integrated HFIs
	IB/hfi1: Allocate context data on memory node
	target/iscsi: Fix unsolicited data seq_end_offset calculation
	hrtimer: Catch invalid clockids again
	nfsd/callback: Cleanup callback cred on shutdown
	powerpc/perf: Add restrictions to PMC5 in power9 DD1
	drm/nouveau/gr/gf100-: fix ccache error logging
	regulator: core: Resolve supplies before disabling unused regulators
	btmrvl: avoid double-disable_irq() race
	EDAC, mce_amd: Print IPID and Syndrome on a separate line
	cpufreq: CPPC: add ACPI_PROCESSOR dependency
	usb: dwc3: gadget: Correct ISOC DATA PIDs for short packets
	Linux 4.9.58

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2017-10-23 09:35:27 +02:00
Wanpeng Li
ab3d531745 sched/fair: Update rq clock before changing a task's CPU affinity 
[ Upstream commit a499c3ead8 ]

This is triggered during boot when CONFIG_SCHED_DEBUG is enabled:

 ------------[ cut here ]------------
 WARNING: CPU: 6 PID: 81 at kernel/sched/sched.h:812 set_next_entity+0x11d/0x380
 rq->clock_update_flags < RQCF_ACT_SKIP
 CPU: 6 PID: 81 Comm: torture_shuffle Not tainted 4.10.0+ #1
 Hardware name: LENOVO ThinkCentre M8500t-N000/SHARKBAY, BIOS FBKTC1AUS 02/16/2016
 Call Trace:
  dump_stack+0x85/0xc2
  __warn+0xcb/0xf0
  warn_slowpath_fmt+0x5f/0x80
  set_next_entity+0x11d/0x380
  set_curr_task_fair+0x2b/0x60
  do_set_cpus_allowed+0x139/0x180
  __set_cpus_allowed_ptr+0x113/0x260
  set_cpus_allowed_ptr+0x10/0x20
  torture_shuffle+0xfd/0x180
  kthread+0x10f/0x150
  ? torture_shutdown_init+0x60/0x60
  ? kthread_create_on_node+0x60/0x60
  ret_from_fork+0x31/0x40
 ---[ end trace dd94d92344cea9c6 ]---

The task is running && !queued, so there is no rq clock update before calling
set_curr_task().

This patch fixes it by updating rq clock after holding rq->lock/pi_lock
just as what other dequeue + put_prev + enqueue + set_curr story does.

Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1487749975-5994-1-git-send-email-wanpeng.li@hotmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2017-10-21 17:21:35 +02:00
Greg Kroah-Hartman
cdbe07ad26 Merge 4.9.55 into android-4.9 
Changes in 4.9.55
	USB: gadgetfs: Fix crash caused by inadequate synchronization
	USB: gadgetfs: fix copy_to_user while holding spinlock
	usb: gadget: udc: atmel: set vbus irqflags explicitly
	usb: gadget: udc: renesas_usb3: fix for no-data control transfer
	usb: gadget: udc: renesas_usb3: fix Pn_RAMMAP.Pn_MPKT value
	usb: gadget: udc: renesas_usb3: Fix return value of usb3_write_pipe()
	usb-storage: unusual_devs entry to fix write-access regression for Seagate external drives
	usb-storage: fix bogus hardware error messages for ATA pass-thru devices
	usb: renesas_usbhs: fix the BCLR setting condition for non-DCP pipe
	usb: renesas_usbhs: fix usbhsf_fifo_clear() for RX direction
	ALSA: usb-audio: Check out-of-bounds access by corrupted buffer descriptor
	usb: pci-quirks.c: Corrected timeout values used in handshake
	USB: cdc-wdm: ignore -EPIPE from GetEncapsulatedResponse
	USB: dummy-hcd: fix connection failures (wrong speed)
	USB: dummy-hcd: fix infinite-loop resubmission bug
	USB: dummy-hcd: Fix erroneous synchronization change
	USB: devio: Don't corrupt user memory
	usb: gadget: mass_storage: set msg_registered after msg registered
	USB: g_mass_storage: Fix deadlock when driver is unbound
	USB: uas: fix bug in handling of alternate settings
	USB: core: harden cdc_parse_cdc_header
	usb: Increase quirk delay for USB devices
	USB: fix out-of-bounds in usb_set_configuration
	xhci: fix finding correct bus_state structure for USB 3.1 hosts
	xhci: Fix sleeping with spin_lock_irq() held in ASmedia 1042A workaround
	xhci: set missing SuperSpeedPlus Link Protocol bit in roothub descriptor
	Revert "xhci: Limit USB2 port wake support for AMD Promontory hosts"
	iio: adc: twl4030: Fix an error handling path in 'twl4030_madc_probe()'
	iio: adc: twl4030: Disable the vusb3v1 rugulator in the error handling path of 'twl4030_madc_probe()'
	iio: ad_sigma_delta: Implement a dedicated reset function
	staging: iio: ad7192: Fix - use the dedicated reset function avoiding dma from stack.
	iio: core: Return error for failed read_reg
	IIO: BME280: Updates to Humidity readings need ctrl_reg write!
	iio: ad7793: Fix the serial interface reset
	iio: adc: mcp320x: Fix readout of negative voltages
	iio: adc: mcp320x: Fix oops on module unload
	uwb: properly check kthread_run return value
	uwb: ensure that endpoint is interrupt
	staging: vchiq_2835_arm: Fix NULL ptr dereference in free_pagelist
	mm, oom_reaper: skip mm structs with mmu notifiers
	lib/ratelimit.c: use deferred printk() version
	lsm: fix smack_inode_removexattr and xattr_getsecurity memleak
	ALSA: compress: Remove unused variable
	Revert "ALSA: echoaudio: purge contradictions between dimension matrix members and total number of members"
	ALSA: usx2y: Suppress kernel warning at page allocation failures
	mlxsw: spectrum: Prevent mirred-related crash on removal
	net: sched: fix use-after-free in tcf_action_destroy and tcf_del_walker
	sctp: potential read out of bounds in sctp_ulpevent_type_enabled()
	tcp: update skb->skb_mstamp more carefully
	bpf/verifier: reject BPF_ALU64|BPF_END
	tcp: fix data delivery rate
	udpv6: Fix the checksum computation when HW checksum does not apply
	ip6_gre: skb_push ipv6hdr before packing the header in ip6gre_header
	net: phy: Fix mask value write on gmii2rgmii converter speed register
	ip6_tunnel: do not allow loading ip6_tunnel if ipv6 is disabled in cmdline
	net/sched: cls_matchall: fix crash when used with classful qdisc
	tcp: fastopen: fix on syn-data transmit failure
	net: emac: Fix napi poll list corruption
	packet: hold bind lock when rebinding to fanout hook
	bpf: one perf event close won't free bpf program attached by another perf event
	isdn/i4l: fetch the ppp_write buffer in one shot
	net_sched: always reset qdisc backlog in qdisc_reset()
	net: qcom/emac: specify the correct size when mapping a DMA buffer
	vti: fix use after free in vti_tunnel_xmit/vti6_tnl_xmit
	l2tp: Avoid schedule while atomic in exit_net
	l2tp: fix race condition in l2tp_tunnel_delete
	tun: bail out from tun_get_user() if the skb is empty
	net: dsa: Fix network device registration order
	packet: in packet_do_bind, test fanout with bind_lock held
	packet: only test po->has_vnet_hdr once in packet_snd
	net: Set sk_prot_creator when cloning sockets to the right proto
	netlink: do not proceed if dump's start() errs
	ip6_gre: ip6gre_tap device should keep dst
	ip6_tunnel: update mtu properly for ARPHRD_ETHER tunnel device in tx path
	tipc: use only positive error codes in messages
	net: rtnetlink: fix info leak in RTM_GETSTATS call
	socket, bpf: fix possible use after free
	powerpc/64s: Use emergency stack for kernel TM Bad Thing program checks
	powerpc/tm: Fix illegal TM state in signal handler
	percpu: make this_cpu_generic_read() atomic w.r.t. interrupts
	driver core: platform: Don't read past the end of "driver_override" buffer
	Drivers: hv: fcopy: restore correct transfer length
	stm class: Fix a use-after-free
	ftrace: Fix kmemleak in unregister_ftrace_graph
	HID: i2c-hid: allocate hid buffers for real worst case
	HID: wacom: leds: Don't try to control the EKR's read-only LEDs
	HID: wacom: Always increment hdev refcount within wacom_get_hdev_data
	HID: wacom: bits shifted too much for 9th and 10th buttons
	rocker: fix rocker_tlv_put_* functions for KASAN
	netlink: fix nla_put_{u8,u16,u32} for KASAN
	iwlwifi: mvm: use IWL_HCMD_NOCOPY for MCAST_FILTER_CMD
	iwlwifi: add workaround to disable wide channels in 5GHz
	scsi: sd: Do not override max_sectors_kb sysfs setting
	brcmfmac: add length check in brcmf_cfg80211_escan_handler()
	brcmfmac: setup passive scan if requested by user-space
	drm/i915/bios: ignore HDMI on port A
	nvme-pci: Use PCI bus address for data/queues in CMB
	mmc: core: add driver strength selection when selecting hs400es
	sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs
	vfs: deny copy_file_range() for non regular files
	ext4: fix data corruption for mmap writes
	ext4: Don't clear SGID when inheriting ACLs
	ext4: don't allow encrypted operations without keys
	f2fs: don't allow encrypted operations without keys
	KVM: x86: fix singlestepping over syscall
	Linux 4.9.55

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2017-10-12 22:31:24 +02:00
Peter Zijlstra
ba15518c26 sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs 
commit 50e7663233 upstream.

Cpusets vs. suspend-resume is _completely_ broken. And it got noticed
because it now resulted in non-cpuset usage breaking too.

On suspend cpuset_cpu_inactive() doesn't call into
cpuset_update_active_cpus() because it doesn't want to move tasks about,
there is no need, all tasks are frozen and won't run again until after
we've resumed everything.

But this means that when we finally do call into
cpuset_update_active_cpus() after resuming the last frozen cpu in
cpuset_cpu_active(), the top_cpuset will not have any difference with
the cpu_active_mask and this it will not in fact do _anything_.

So the cpuset configuration will not be restored. This was largely
hidden because we would unconditionally create identity domains and
mobile users would not in fact use cpusets much. And servers what do use
cpusets tend to not suspend-resume much.

An addition problem is that we'd not in fact wait for the cpuset work to
finish before resuming the tasks, allowing spurious migrations outside
of the specified domains.

Fix the rebuild by introducing cpuset_force_rebuild() and fix the
ordering with cpuset_wait_for_hotplug().

Reported-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: deb7aa308e ("cpuset: reorganize CPU / memory hotplug handling")
Link: http://lkml.kernel.org/r/20170907091338.orwxrqkbfkki3c24@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2017-10-12 11:51:25 +02:00
Victor Wan
3f653b7e57 Merge branch 'android-4.9' into amlogic-4.9-dev 
Conflicts:
	arch/arm/configs/s3c2410_defconfig
	drivers/mmc/core/mmc.c

Signed-off-by: Victor Wan <victor.wan@amlogic.com>
 2017-08-31 14:01:28 +08:00
Victor Wan
5772a3ba4f Merge branch 'android-4.9' into amlogic-4.9-dev 2017-08-14 15:24:11 +08:00
Greg Kroah-Hartman
e6b0c64f6f Merge 4.9.41 into android-4.9 
Changes in 4.9.41
	af_key: Add lock to key dump
	pstore: Make spinlock per zone instead of global
	net: reduce skb_warn_bad_offload() noise
	jfs: Don't clear SGID when inheriting ACLs
	ALSA: fm801: Initialize chip after IRQ handler is registered
	ALSA: hda - Add missing NVIDIA GPU codec IDs to patch table
	parisc: Prevent TLB speculation on flushed pages on CPUs that only support equivalent aliases
	parisc: Extend disabled preemption in copy_user_page
	parisc: Suspend lockup detectors before system halt
	powerpc/pseries: Fix of_node_put() underflow during reconfig remove
	NFS: invalidate file size when taking a lock.
	NFSv4.1: Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
	crypto: authencesn - Fix digest_null crash
	KVM: PPC: Book3S HV: Enable TM before accessing TM registers
	md/raid5: add thread_group worker async_tx_issue_pending_all
	drm/vmwgfx: Fix gcc-7.1.1 warning
	drm/nouveau/disp/nv50-: bump max chans to 21
	drm/nouveau/bar/gf100: fix access to upper half of BAR2
	KVM: PPC: Book3S HV: Restore critical SPRs to host values on guest exit
	KVM: PPC: Book3S HV: Save/restore host values of debug registers
	Revert "powerpc/numa: Fix percpu allocations to be NUMA aware"
	Staging: comedi: comedi_fops: Avoid orphaned proc entry
	drm: rcar-du: Simplify and fix probe error handling
	smp/hotplug: Move unparking of percpu threads to the control CPU
	smp/hotplug: Replace BUG_ON and react useful
	nfc: Fix hangup of RC-S380* in port100_send_ack()
	nfc: fdp: fix NULL pointer dereference
	net: phy: Do not perform software reset for Generic PHY
	isdn: Fix a sleep-in-atomic bug
	isdn/i4l: fix buffer overflow
	ath10k: fix null deref on wmi-tlv when trying spectral scan
	wil6210: fix deadlock when using fw_no_recovery option
	mailbox: always wait in mbox_send_message for blocking Tx mode
	mailbox: skip complete wait event if timer expired
	mailbox: handle empty message in tx_tick
	sched/cgroup: Move sched_online_group() back into css_online() to fix crash
	RDMA/uverbs: Fix the check for port number
	ipmi/watchdog: fix watchdog timeout set on reboot
	dentry name snapshots
	v4l: s5c73m3: fix negation operator
	pstore: Allow prz to control need for locking
	pstore: Correctly initialize spinlock and flags
	pstore: Use dynamic spinlock initializer
	net: skb_needs_check() accepts CHECKSUM_NONE for tx
	device-dax: fix sysfs duplicate warnings
	x86/mce/AMD: Make the init code more robust
	r8169: add support for RTL8168 series add-on card.
	ARM: omap2+: fixing wrong strcat for Non-NULL terminated string
	dt-bindings: power/supply: Update TPS65217 properties
	dt-bindings: input: Specify the interrupt number of TPS65217 power button
	ARM: dts: am57xx-idk: Put USB2 port in peripheral mode
	ARM: dts: n900: Mark eMMC slot with no-sdio and no-sd flags
	net/mlx5: Disable RoCE on the e-switch management port under switchdev mode
	ipv6: Should use consistent conditional judgement for ip6 fragment between __ip6_append_data and ip6_finish_output
	net/mlx4_core: Use-after-free causes a resource leak in flow-steering detach
	net/mlx4: Remove BUG_ON from ICM allocation routine
	net/mlx4_core: Fix raw qp flow steering rules under SRIOV
	drm/msm: Ensure that the hardware write pointer is valid
	drm/msm: Put back the vaddr in submit_reloc()
	drm/msm: Verify that MSM_SUBMIT_BO_FLAGS are set
	vfio-pci: use 32-bit comparisons for register address for gcc-4.5
	irqchip/keystone: Fix "scheduling while atomic" on rt
	ASoC: tlv320aic3x: Mark the RESET register as volatile
	spi: dw: Make debugfs name unique between instances
	ASoC: nau8825: fix invalid configuration in Pre-Scalar of FLL
	irqchip/mxs: Enable SKIP_SET_WAKE and MASK_ON_SUSPEND
	openrisc: Add _text symbol to fix ksym build error
	dmaengine: ioatdma: Add Skylake PCI Dev ID
	dmaengine: ioatdma: workaround SKX ioatdma version
	l2tp: consider '::' as wildcard address in l2tp_ip6 socket lookup
	dmaengine: ti-dma-crossbar: Add some 'of_node_put()' in error path.
	usb: dwc3: omap: fix race of pm runtime with irq handler in probe
	ARM64: zynqmp: Fix W=1 dtc 1.4 warnings
	ARM64: zynqmp: Fix i2c node's compatible string
	perf probe: Fix to get correct modname from elf header
	ARM: s3c2410_defconfig: Fix invalid values for NF_CT_PROTO_*
	ACPI / scan: Prefer devices without _HID/_CID for _ADR matching
	usb: gadget: Fix copy/pasted error message
	Btrfs: use down_read_nested to make lockdep silent
	Btrfs: fix lockdep warning about log_mutex
	benet: stricter vxlan offloading check in be_features_check
	Btrfs: adjust outstanding_extents counter properly when dio write is split
	Xen: ARM: Zero reserved fields of xatp before making hypervisor call
	tools lib traceevent: Fix prev/next_prio for deadline tasks
	xfrm: Don't use sk_family for socket policy lookups
	perf tools: Install tools/lib/traceevent plugins with install-bin
	perf symbols: Robustify reading of build-id from sysfs
	video: fbdev: cobalt_lcdfb: Handle return NULL error from devm_ioremap
	vfio-pci: Handle error from pci_iomap
	arm64: mm: fix show_pte KERN_CONT fallout
	nvmem: imx-ocotp: Fix wrong register size
	net: usb: asix_devices: add .reset_resume for USB PM
	ASoC: fsl_ssi: set fifo watermark to more reliable value
	sh_eth: enable RX descriptor word 0 shift on SH7734
	ARCv2: IRQ: Call entry/exit functions for chained handlers in MCIP
	ALSA: usb-audio: test EP_FLAG_RUNNING at urb completion
	x86/platform/intel-mid: Rename 'spidev' to 'mrfld_spidev'
	perf/x86: Set pmu->module in Intel PMU modules
	ASoC: Intel: bytcr-rt5640: fix settings in internal clock mode
	HID: ignore Petzl USB headlamp
	scsi: fnic: Avoid sending reset to firmware when another reset is in progress
	scsi: snic: Return error code on memory allocation failure
	scsi: bfa: Increase requested firmware version to 3.2.5.1
	ASoC: Intel: Skylake: Release FW ctx in cleanup
	ASoC: dpcm: Avoid putting stream state to STOP when FE stream is paused
	Linux 4.9.41

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2017-08-07 14:21:32 -07:00
Konstantin Khlebnikov
62b5776c8c sched/cgroup: Move sched_online_group() back into css_online() to fix crash 
commit 96b777452d upstream.

Commit:

  2f5177f0fd ("sched/cgroup: Fix/cleanup cgroup teardown/init")

.. moved sched_online_group() from css_online() to css_alloc().
It exposes half-baked task group into global lists before initializing
generic cgroup stuff.

LTP testcase (third in cgroup_regression_test) written for testing
similar race in kernels 2.6.26-2.6.28 easily triggers this oops:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
  IP: kernfs_path_from_node_locked+0x260/0x320
  CPU: 1 PID: 30346 Comm: cat Not tainted 4.10.0-rc5-test #4
  Call Trace:
  ? kernfs_path_from_node+0x4f/0x60
  kernfs_path_from_node+0x3e/0x60
  print_rt_rq+0x44/0x2b0
  print_rt_stats+0x7a/0xd0
  print_cpu+0x2fc/0xe80
  ? __might_sleep+0x4a/0x80
  sched_debug_show+0x17/0x30
  seq_read+0xf2/0x3b0
  proc_reg_read+0x42/0x70
  __vfs_read+0x28/0x130
  ? security_file_permission+0x9b/0xc0
  ? rw_verify_area+0x4e/0xb0
  vfs_read+0xa5/0x170
  SyS_read+0x46/0xa0
  entry_SYSCALL_64_fastpath+0x1e/0xad

Here the task group is already linked into the global RCU-protected 'task_groups'
list, but the css->cgroup pointer is still NULL.

This patch reverts this chunk and moves online back to css_online().

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 2f5177f0fd ("sched/cgroup: Fix/cleanup cgroup teardown/init")
Link: http://lkml.kernel.org/r/148655324740.424917.5302984537258726349.stgit@buzz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2017-08-06 18:59:42 -07:00
Andres Oportus
8990dc7f3c ANDROID: sched/core: Fix PELT jump to max OPP upon util increase 
Change-Id: Ic80b588ec466ef707f658dcea039fd0d6b384b63
Signed-off-by: Andres Oportus <andresoportus@google.com>
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-08-03 15:30:30 -07:00
Dietmar Eggemann
06654998ed ANDROID: sched: EAS & 'single cpu per cluster'/cpu hotplug interoperability 
For Energy-Aware Scheduling (EAS) to work properly, even in the
case that there is only one cpu per cluster or that cpus are hot-plugged
out, the Energy Model (EM) data on all energy-aware sched domains (sd)
has to be present for all online cpus.

Mainline sd hierarchy setup code will remove sd's which are not useful
for task scheduling e.g. in the following situations:

1. Only 1 cpu is/remains in one cluster of a multi cluster system.

   This remaining cpu only has DIE and no MC sd.

2. A complete cluster in a two cluster system is hot-plugged out.

   The cpus of the remaining cluster only have MC and no DIE sd.

To make sure that all online cpus keep all their energy-aware sd's,
the sd degenerate functionality has been changed to not free a sd if
its first sched group (sg) contains EM data in case:

1. There is only 1 cpu left in the sd.

2. There have to be at least 2 sg's if certain sd flags are set.

Instead of freeing such a sd it now clears only its SD_LOAD_BALANCE
flag. This will make sure that the EAS functionality will always see
all energy-aware sd's for all online cpus.

It will introduce a tiny performance degradation for operations on
affected cpus since the hot-path macro for_each_domain() has to deal
with sd's not contributing to task scheduling at all now.

In most cases the exisiting code makes sure that task scheduling is not
invoked on a sd with !SD_LOAD_BALANCE.

However, a small change is necessary in update_sd_lb_stats() to make
sure that sd->parent is only initialized to !NULL in case the parent sd
contains more than 1 sg.

The handling of newidle decay values before the SD_LOAD_BALANCE check in
rebalance_domains() stays unchanged.

Test (w/ CONFIG_SCHED_DEBUG):

JUNO r0 default system:

$ cat /proc/cpuinfo | grep "^CPU part"
CPU part        : 0xd03
CPU part        : 0xd07
CPU part        : 0xd07
CPU part        : 0xd03
CPU part        : 0xd03
CPU part        : 0xd03

SD names and flags:

$ cat /proc/sys/kernel/sched_domain/cpu*/domain*/name
MC
DIE
MC
DIE
MC
DIE
MC
DIE
MC
DIE
MC
DIE

$ printf "%x\n" `cat /proc/sys/kernel/sched_domain/cpu*/domain*/flags`
832f
102f
832f
102f
832f
102f
832f
102f
832f
102f
832f
102f

Test 1: Hotplug-out one A57 (CPU part 0xd07) cpu:

$ echo 0 > /sys/devices/system/cpu/cpu1/online

$ cat /proc/cpuinfo | grep "^CPU part"
CPU part        : 0xd03
CPU part        : 0xd07
CPU part        : 0xd03
CPU part        : 0xd03
CPU part        : 0xd03

SD names and flags for remaining A57 (cpu2) cpu:

$ cat /proc/sys/kernel/sched_domain/cpu2/domain*/name
MC
DIE

$ printf "%x\n" `cat /proc/sys/kernel/sched_domain/cpu2/domain*/flags`
832e <-- MC SD with !SD_LOAD_BALANCE
102f

Test 2: Hotplug-out the entire A57 cluster:

$ echo 0 > /sys/devices/system/cpu/cpu1/online
$ echo 0 > /sys/devices/system/cpu/cpu2/online

$ cat /proc/cpuinfo | grep "^CPU part"
CPU part        : 0xd03
CPU part        : 0xd03
CPU part        : 0xd03
CPU part        : 0xd03

SD names and flags for the remaining A53 (CPU part 0xd03) cluster:

$ cat /proc/sys/kernel/sched_domain/cpu*/domain*/name
MC
DIE
MC
DIE
MC
DIE
MC
DIE

$ printf "%x\n" `cat /proc/sys/kernel/sched_domain/cpu*/domain*/flags`
832f
102e <-- DIE SD with !SD_LOAD_BALANCE
832f
102e
832f
102e
832f
102e

Change-Id: If24aa2b2628f334abbf0207d39e2a86168d9d673
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-08-03 15:30:29 -07:00
Vincent Guittot
96956e2684 UPSTREAM: sched/fair: Propagate load during synchronous attach/detach 
When a task moves from/to a cfs_rq, we set a flag which is then used to
propagate the change at parent level (sched_entity and cfs_rq) during
next update. If the cfs_rq is throttled, the flag will stay pending until
the cfs_rq is unthrottled.

For propagating the utilization, we copy the utilization of group cfs_rq to
the sched_entity.

For propagating the load, we have to take into account the load of the
whole task group in order to evaluate the load of the sched_entity.
Similarly to what was done before the rewrite of PELT, we add a correction
factor in case the task group's load is greater than its share so it will
contribute the same load of a task of equal weight.

Change-Id: I0aeaed29bb880c91d10df82c38ac9fc681de4f76
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Morten.Rasmussen@arm.com
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bsegall@google.com
Cc: kernellwp@gmail.com
Cc: pjt@google.com
Cc: yuyang.du@intel.com
Link: http://lkml.kernel.org/r/1478598827-32372-5-git-send-email-vincent.guittot@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 09a43ace1f)
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 2017-08-03 15:30:27 -07:00