Brendan Jackman 3dcbf5e447 sched/core: Warn if ENERGY_AWARE is enabled but data is missing ...

If the EAS energy model is missing or incomplete, i.e. sd_scs is NULL, then
sched_group_energy will return -EINVAL on the assumption that it raced with a
CPU hotplug event. In that case, energy_diff will return 0 and the energy-aware
wake path will silently fail to trigger any migrations.

This case can be triggered by disabling CONFIG_SCHED_MC on existing platforms,
so that there are no sched_groups with the SD_SHARE_CAP_STATES flag, so that
sd_scs is NULL.

Add checks so that a warning is printed if EAS is ever enabled while the
necessary data is not present.

Change-Id: Id233a510b5ad8b7fcecac0b1d789e730bbfc7c4a
Signed-off-by: Brendan Jackman <brendan.jackman@arm.com>

2017-11-20 21:15:59 +05:30

..

bpf

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-11-20 20:53:19 +05:30

configs

kconfig: tinyconfig: provide whole choice blocks to avoid warnings

2016-09-24 10:07:42 +02:00

debug

UPSTREAM: module: use a structure to encapsulate layout.

2017-08-11 19:31:04 +05:30

events

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-11-20 20:53:19 +05:30

gcov

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-09-03 12:01:45 +08:00

irq

genirq: Release resources in __setup_irq() error path

2017-06-26 07:13:10 +02:00

livepatch

livepatch: x86: fix relocation computation with kASLR

2015-11-11 17:36:04 +01:00

locking

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-11-20 20:53:19 +05:30

power

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-10-13 23:14:45 +08:00

printk

UPSTREAM: printk: when dumping regs, show the stack, not thread_info

2017-08-11 19:31:04 +05:30

rcu

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-11-20 20:53:19 +05:30

sched

sched/core: Warn if ENERGY_AWARE is enabled but data is missing

2017-11-20 21:15:59 +05:30

time

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-10-09 14:32:35 +08:00

trace

FROMLIST: tracing: Add support for preempt and irq enable/disable events

2017-10-15 23:53:55 +05:30

.gitignore

certs: add .gitignore to stop git nagging about x509_certificate_list

2015-10-21 15:18:35 +01:00

acct.c

acct: check FMODE_CAN_WRITE

2015-04-11 22:27:55 -04:00

async.c

kernel/async.c: switch to pr_foo()

2014-10-09 22:26:04 -04:00

audit_fsnotify.c

audit: clean simple fsnotify implementation

2015-08-06 16:14:53 -04:00

audit_tree.c

audit: audit_tree_match can be boolean

2015-11-04 08:23:51 -05:00

audit_watch.c

audit: Fix use after free in audit_remove_watch_rule()

2017-08-24 17:02:35 -07:00

audit.c

BACKPORT: audit: consistently record PIDs with task_tgid_nr()

2016-10-12 17:34:22 +05:30

audit.h

audit: audit_tree_match can be boolean

2015-11-04 08:23:51 -05:00

auditfilter.c

audit: fix comment block whitespace

2015-11-04 08:23:51 -05:00

auditsc.c

BACKPORT: audit: consistently record PIDs with task_tgid_nr()

2016-10-12 17:34:22 +05:30

backtracetest.c

kernel/backtracetest.c: replace no level printk by pr_info()

2014-06-04 16:54:14 -07:00

bounds.c

page-cgroup: get rid of NR_PCG_FLAGS

2014-08-08 15:57:18 -07:00

capability.c

exec: Ensure mm->user_ns contains the execed files

2017-01-06 11:16:14 +01:00

cgroup_freezer.c

cgroup: fix handling of multi-destination migration from subtree_control enabling

2015-12-03 10:18:21 -05:00

cgroup_pids.c

cgroup_pids: don't account for the root cgroup

2015-12-03 10:18:21 -05:00

cgroup.c

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-04-23 12:02:14 +08:00

compat.c

compat: cleanup coding in compat_get_bitmap() and compat_put_bitmap()

2015-06-04 23:57:18 +02:00

configs.c

…

context_tracking.c

context_tracking: avoid irq_save/irq_restore on guest entry and exit

2015-11-10 12:06:23 +01:00

cpu_pm.c

kernel/cpu_pm: fix cpu_cluster_pm_exit comment

2015-09-03 02:42:20 +02:00

cpu.c

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-01-13 12:01:52 +08:00

cpuset.c

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-10-13 23:14:45 +08:00

crash_dump.c

crash_dump: Make is_kdump_kernel() accessible from modules

2014-08-25 15:42:19 -07:00

cred.c

cred: Reject inodes with invalid ids in set_create_file_as()

2016-09-15 08:27:49 +02:00

delayacct.c

delayacct: Remove braindamaged type conversions

2014-07-23 10:18:06 -07:00

dma.c

…

elfcore.c

switch elf_core_write_extra_phdrs() to dump_emit()

2013-11-09 00:16:23 -05:00

exec_domain.c

Remove rest of exec domains.

2015-04-12 21:03:31 +02:00

exit.c

FIXUP: sched/tune: fix accounting for runnable tasks

2016-09-14 14:59:32 +05:30

extable.c

kernel/extable.c: mark core_kernel_text notrace

2017-07-21 07:44:56 +02:00

fork.c

BACKPORT: partial: mm, oom_reaper: do not mmput synchronously from the oom reaper context

2017-10-15 23:21:09 +05:30

freezer.c

freezer: remove obsolete comments in __thaw_task()

2014-10-21 23:44:20 +02:00

futex_compat.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-02-25 12:01:16 -08:00

futex.c

Merge tag 'v4.4.56' into linux-linaro-lsk-v4.4

2017-03-23 12:00:54 +08:00

groups.c

kernel: conditionally support non-root users, groups and capabilities

2015-04-15 16:35:22 -07:00

hung_task.c

kernel/hung_task.c: change hung_task.c to use for_each_process_thread()

2015-04-15 16:35:22 -07:00

irq_work.c

treewide: Remove old email address

2015-11-23 09:44:58 +01:00

jump_label.c

jump_labels: API for flushing deferred jump label updates

2017-01-19 20:17:19 +01:00

kallsyms.c

kernel/kallsyms.c: use __seq_open_private()

2014-10-14 02:18:16 +02:00

kcmp.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-02-25 12:01:16 -08:00

Kconfig.freezer

…

Kconfig.hz

kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS

2013-11-15 09:32:22 +09:00

Kconfig.locks

locking/qrwlock: Rename QUEUE_RWLOCK to QUEUED_RWLOCKS

2015-05-12 09:46:00 +02:00

Kconfig.preempt

…

kexec_core.c

s390/kexec: consolidate crash_map/unmap_reserved_pages() and arch_kexec_protect(unprotect)_crashkres()

2017-10-25 11:26:32 +08:00

kexec_file.c

kexec: introduce a protection mechanism for the crashkernel reserved memory

2017-10-25 11:23:52 +08:00

kexec_internal.h

kexec: split kexec_file syscall code to kexec_file.c

2015-09-10 13:29:01 -07:00

kexec.c

s390/kexec: consolidate crash_map/unmap_reserved_pages() and arch_kexec_protect(unprotect)_crashkres()

2017-10-25 11:26:32 +08:00

kmod.c

kmod: don't run async usermode helper as a child of kworker thread

2015-10-23 17:55:10 +09:00

kprobes.c

tracing/kprobes: Enforce kprobes teardown after testing

2017-05-25 14:30:17 +02:00

ksysfs.c

kexec: split kexec_load syscall from kexec core code

2015-09-10 13:29:01 -07:00

kthread.c

UPSTREAM: kthread: Pin the stack via try_get_task_stack()/put_task_stack() in to_live_kthread() function

2017-08-11 19:31:04 +05:30

latencytop.c

kernel/latencytop.c: convert seq_printf to seq_puts

2014-06-04 16:54:15 -07:00

Makefile

sys_membarrier(): system-wide memory barrier (generic, x86)

2015-09-11 15:21:34 -07:00

membarrier.c

Fix: Disable sys_membarrier when nohz_full is enabled

2017-03-12 06:37:26 +01:00

memremap.c

mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done}

2017-01-19 20:17:18 +01:00

module_signing.c

KEYS: Merge the type-specific data with the payload data

2015-10-21 15:18:36 +01:00

module-internal.h

KEYS: Separate the kernel signature checking keyring from module signing

2013-09-25 17:17:01 +01:00

module.c

UPSTREAM: modules: fix longstanding /proc/kallsyms vs module insertion race.

2017-08-11 19:31:04 +05:30

notifier.c

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-09-01 08:40:25 -07:00

nsproxy.c

bury struct proc_ns in fs/proc

2014-12-04 14:34:54 -05:00

padata.c

padata: free correct variable

2017-05-20 14:27:02 +02:00

panic.c

kernel/panic.c: add missing \n

2017-07-05 14:37:19 +02:00

params.c

Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

2015-11-09 15:53:39 -08:00

pid_namespace.c

pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes

2017-05-25 14:30:11 +02:00

pid.c

pids: make task_tgid_nr_ns() safe

2017-08-24 17:02:36 -07:00

profile.c

mm: rename alloc_pages_exact_node() to __alloc_pages_node()

2015-09-08 15:35:28 -07:00

ptrace.c

ptrace: Properly initialize ptracer_cred on fork

2017-06-14 13:16:20 +02:00

range.c

kernel: avoid overflow in cmp_range

2015-01-17 10:02:23 +13:00

reboot.c

kexec: split kexec_load syscall from kexec core code

2015-09-10 13:29:01 -07:00

relay.c

kernel/relay.c: use kvfree() in relay_free_page_array()

2015-06-30 19:44:59 -07:00

resource.c

/proc/iomem: only expose physical resource addresses to privileged users

2017-08-06 19:19:42 -07:00

seccomp.c

seccomp: fix the usage of get/put_seccomp_filter() in seccomp_get_filter()

2017-10-05 09:41:46 +02:00

signal.c

signal: protect SIGNAL_UNKILLABLE from unintentional clearing.

2017-08-11 09:08:59 -07:00

smp.c

mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd

2015-11-06 17:50:42 -08:00

smpboot.c

stop_machine: Kill smp_hotplug_thread->pre_unpark, introduce stop_machine_unpark()

2015-10-20 10:23:55 +02:00

smpboot.h

…

softirq.c

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-02-09 15:24:03 -08:00

stacktrace.c

stacktrace: introduce snprint_stack_trace for buffer output

2014-12-13 12:42:48 -08:00

stop_machine.c

kernel: remove stop_machine() Kconfig dependency

2015-12-12 10:15:34 -08:00

sys_ni.c

mm: mlock: add new mlock system call

2015-11-05 19:34:48 -08:00

sys.c

BACKPORT: timer: convert timer_slack_ns from unsigned long to u64

2016-07-11 12:43:04 +05:30

sysctl_binary.c

fs/coredump: prevent fsuid=0 dumps into user-controlled directories

2016-04-12 09:08:58 -07:00

sysctl.c

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-10-09 14:32:35 +08:00

task_work.c

task_work: remove fifo ordering guarantee

2015-09-05 13:46:58 -07:00

taskstats.c

netlink: make nlmsg_end() and genlmsg_end() void

2015-01-18 01:03:45 -05:00

test_kprobes.c

kernel/test_kprobes.c: use current logging functions

2014-08-08 15:57:18 -07:00

torture.c

torture: Consolidate cond_resched_rcu_qs() into stutter_wait()

2015-10-06 11:25:01 -07:00

tracepoint.c

tracepoint: Give priority to probes of tracepoints

2015-10-25 21:33:54 -04:00

tsacct.c

sched: Make task->start_time nanoseconds based

2014-07-23 10:18:05 -07:00

uid16.c

groups: Consolidate the setgroups permission checks

2014-12-05 17:19:27 -06:00

up.c

smp: Rename __smp_call_function_single() to smp_call_function_single_async()

2014-02-24 14:47:15 -08:00

user_namespace.c

capabilities: ambient capabilities

2015-09-04 16:54:41 -07:00

user-return-notifier.c

scheduler: Replace __get_cpu_var with this_cpu_ptr

2014-08-26 13:45:45 -04:00

user.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2014-12-17 12:31:40 -08:00

utsname_sysctl.c

sysctl: convert use of typedef ctl_table to struct ctl_table

2014-06-06 16:08:16 -07:00

utsname.c

copy address of proc_ns_ops into ns_common

2014-12-04 14:34:47 -05:00

watchdog.c

Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

2017-01-09 12:01:35 +08:00

workqueue_internal.h

workqueue: Fix NULL pointer dereference

2017-11-15 17:13:11 +01:00

workqueue.c

workqueue: replace pool->manager_arb mutex with a flag

2017-11-02 09:40:48 +01:00