Michal Hocko f913da596a proc, oom: drop bogus sighand lock ...

Oleg has pointed out that can simplify both oom_adj_{read,write} and
oom_score_adj_{read,write} even further and drop the sighand lock.  The
main purpose of the lock was to protect p->signal from going away but this
will not happen since ea6d290ca3 ("signals: make task_struct->signal
immutable/refcountable").

The other role of the lock was to synchronize different writers,
especially those with CAP_SYS_RESOURCE.  Introduce a mutex for this
purpose.  Later patches will need this lock anyway.

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Link: http://lkml.kernel.org/r/1466426628-15074-3-git-send-email-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2016-07-28 16:07:41 -07:00

..

array.c

procfs: expose umask in /proc/<PID>/status

2016-05-20 17:58:30 -07:00

base.c

proc, oom: drop bogus sighand lock

2016-07-28 16:07:41 -07:00

cmdline.c

…

consoles.c

…

cpuinfo.c

…

devices.c

…

fd.c

switch all procfs directories ->iterate_shared()

2016-05-02 19:49:30 -04:00

fd.h

…

generic.c

switch all procfs directories ->iterate_shared()

2016-05-02 19:49:30 -04:00

inode.c

kmemcg: account certain kmem allocations to memcg

2016-01-14 16:00:49 -08:00

internal.h

proc: Allow creating permanently empty directories that serve as mount points

2015-07-01 10:36:41 -05:00

interrupts.c

…

Kconfig

fs, proc: add help for CONFIG_PROC_CHILDREN

2015-07-17 16:39:52 -07:00

kcore.c

wrappers for ->i_mutex access

2016-01-22 18:04:28 -05:00

kmsg.c

…

loadavg.c

…

Makefile

…

meminfo.c

mm, rmap: account shmem thp pages

2016-07-26 16:19:19 -07:00

namespaces.c

switch all procfs directories ->iterate_shared()

2016-05-02 19:49:30 -04:00

nommu.c

vfs: add seq_file_path() helper

2015-06-23 18:01:07 -04:00

page.c

mm: rename _count, field of the struct page, to _refcount

2016-05-19 19:12:14 -07:00

proc_net.c

switch all procfs directories ->iterate_shared()

2016-05-02 19:49:30 -04:00

proc_sysctl.c

switch all procfs directories ->iterate_shared()

2016-05-02 19:49:30 -04:00

proc_tty.c

…

root.c

Merge branch 'stacking-fixes' (vfs stacking fixes from Jann)

2016-06-10 12:10:02 -07:00

self.c

wrappers for ->i_mutex access

2016-01-22 18:04:28 -05:00

softirqs.c

…

stat.c

…

task_mmu.c

mm, rmap: account shmem thp pages

2016-07-26 16:19:19 -07:00

task_nommu.c

proc: revert /proc/<pid>/maps [stack:TID] annotation

2016-02-03 08:28:43 -08:00

thread_self.c

wrappers for ->i_mutex access

2016-01-22 18:04:28 -05:00

uptime.c

…

version.c

…

vmcore.c

crash_dump: Add vmcore_elf32_check_arch

2016-05-13 14:01:59 +02:00