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Filename Latest commit message Latest commit date
Stefano Garzarella 8eb92c1228 io_uring: prevent sq_thread from spinning when it should stop 
commit 7143b5ac5750f404ff3a594b34fdf3fc2f99f828 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
certs
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
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
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
scripts
security
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
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
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

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.