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| author | Andrey Ryabinin | 2016-11-10 19:46:38 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2016-11-11 17:12:37 +0100 |
| commit | 70d78fe7c8b640b5acfad56ad341985b3810998a (patch) | |
| tree | ebcdf4e54b1c2ab369ab58a73573683cb04edf1e /mm/slab_common.c | |
| parent | mm/filemap: don't allow partially uptodate page for pipes (diff) | |
| download | kernel-qcow2-linux-70d78fe7c8b640b5acfad56ad341985b3810998a.tar.gz kernel-qcow2-linux-70d78fe7c8b640b5acfad56ad341985b3810998a.tar.xz kernel-qcow2-linux-70d78fe7c8b640b5acfad56ad341985b3810998a.zip | |
coredump: fix unfreezable coredumping task
It could be not possible to freeze coredumping task when it waits for
'core_state->startup' completion, because threads are frozen in
get_signal() before they got a chance to complete 'core_state->startup'.
Inability to freeze a task during suspend will cause suspend to fail.
Also CRIU uses cgroup freezer during dump operation. So with an
unfreezable task the CRIU dump will fail because it waits for a
transition from 'FREEZING' to 'FROZEN' state which will never happen.
Use freezer_do_not_count() to tell freezer to ignore coredumping task
while it waits for core_state->startup completion.
Link: http://lkml.kernel.org/r/1475225434-3753-1-git-send-email-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Tejun Heo <tj@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slab_common.c')
0 files changed, 0 insertions, 0 deletions