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Stefano Garzarella 8eb92c1228 io_uring: prevent sq_thread from spinning when it should stop 
commit 7143b5ac57 upstream.

This patch drops 'cur_mm' before calling cond_resched(), to prevent
the sq_thread from spinning even when the user process is finished.

Before this patch, if the user process ended without closing the
io_uring fd, the sq_thread continues to spin until the
'sq_thread_idle' timeout ends.

In the worst case where the 'sq_thread_idle' parameter is bigger than
INT_MAX, the sq_thread will spin forever.

Fixes: 6c271ce2f1 ("io_uring: add submission polling")
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-28 17:22:27 +01:00
arch
arm64: lse: Fix LSE atomics with LLVM
2020-02-28 17:22:27 +01:00
block
block, bfq: do not plug I/O for bfq_queues with no proc refs
2020-02-24 08:36:31 +01:00
certs
PKCS#7: Refactor verify_pkcs7_signature()
2019-08-05 18:40:18 -04:00
crypto
crypto: rename sm3-256 to sm3 in hash_algo_name
2020-02-28 17:22:26 +01:00
Documentation
mm: Avoid creating virtual address aliases in brk()/mmap()/mremap()
2020-02-28 17:22:21 +01:00
drivers
staging: greybus: use after free in gb_audio_manager_remove_all()
2020-02-28 17:22:26 +01:00
fs
io_uring: prevent sq_thread from spinning when it should stop
2020-02-28 17:22:27 +01:00
include
ALSA: rawmidi: Avoid bit fields for state flags
2020-02-28 17:22:27 +01:00
init
Revert "um: Enable CONFIG_CONSTRUCTORS"
2020-02-01 09:34:53 +00:00
ipc
Revert "ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()"
2020-02-28 17:22:20 +01:00
kernel
bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill
2020-02-28 17:22:27 +01:00
lib
lib/stackdepot.c: fix global out-of-bounds in stack_slabs
2020-02-28 17:22:20 +01:00
LICENSES
LICENSES: Rename other to deprecated
2019-05-03 06:34:32 -06:00
mm
mm: Avoid creating virtual address aliases in brk()/mmap()/mremap()
2020-02-28 17:22:21 +01:00
net
rxrpc: Fix call RCU cleanup using non-bh-safe locks
2020-02-28 17:22:27 +01:00
samples
samples/bpf: Set -fno-stack-protector when building BPF programs
2020-02-24 08:36:36 +01:00
scripts
bpf, btf: Always output invariant hit in pahole DWARF to BTF transform
2020-02-24 08:36:55 +01:00
security
selinux: ensure we cleanup the internal AVC counters on error in avc_update()
2020-02-24 08:36:39 +01:00
sound
ALSA: seq: Fix concurrent access to queue current tick/time
2020-02-28 17:22:27 +01:00
tools
selftests/eeh: Bump EEH wait time to 60s
2020-02-24 08:36:57 +01:00
usr
gen_initramfs_list.sh: fix 'bad variable name' error
2020-01-09 10:20:00 +01:00
virt
KVM: arm64: Treat emulated TVAL TimerValue as a signed 32-bit integer
2020-02-14 16:34:18 -05:00
.clang-format
clang-format: Update with the latest for_each macro list
2019-08-31 10:00:51 +02:00
.cocciconfig
scripts: add Linux .cocciconfig for coccinelle
2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
Opt out of scripts/get_maintainer.pl
2019-05-16 10:53:40 -07:00
.gitattributes
.gitattributes: set git diff driver for C source code files
2016-10-07 18:46:30 -07:00
.gitignore
Merge tag 'modules-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
2019-09-22 10:34:46 -07:00
.mailmap
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2019-11-10 13:41:59 -08:00
COPYING
COPYING: use the new text with points to the license files
2018-03-23 12:41:45 -06:00
CREDITS
MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer
2019-10-10 08:12:51 -07:00
Kbuild
kbuild: do not descend to ./Kbuild when cleaning
2019-08-21 21:03:58 +09:00
Kconfig
docs: kbuild: convert docs to ReST and rename to *.rst
2019-06-14 14:21:21 -06:00
MAINTAINERS
MAINTAINERS: Update drm/i915 bug filing URL
2020-02-28 17:22:19 +01:00
Makefile
Linux 5.4.22
2020-02-24 08:37:04 +01:00
README
Drop all 00-INDEX files from Documentation/
2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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