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| author |   Rik van Riel <riel@redhat.com> | 2014-08-15 16:05:36 -0400 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2014-09-08 08:17:00 +0200 |
| commit | 90ed9cbe765ad358b3151a12b8bf889a3cbcd573 (patch) | |
| tree | 4c0e144c98d2c4822d1308166eb94de3c70c647f /kernel/sys.c | |
| parent | Merge tag 'v3.17-rc4' into sched/core, to prevent conflicts with upcoming patches, and to refresh the tree (diff) | |
| download | linux-dev-90ed9cbe765ad358b3151a12b8bf889a3cbcd573.tar.xz linux-dev-90ed9cbe765ad358b3151a12b8bf889a3cbcd573.zip | |
exit: Always reap resource stats in __exit_signal()
Oleg pointed out that wait_task_zombie adds a task's usage statistics
to the parent's signal struct, but the task's own signal struct should
also propagate the statistics at exit time.
This allows thread_group_cputime(reaped_zombie) to get the statistics
after __unhash_process() has made the task invisible to for_each_thread,
but before the thread has actually been rcu freed, making sure no
non-monotonic results are returned inside that window.
Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Guillaume Morin <guillaume@morinfr.org>
Cc: Ionut Alexa <ionut.m.alexa@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Michal Schmidt <mschmidt@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: umgwanakikbuti@gmail.com
Cc: fweisbec@gmail.com
Cc: srao@redhat.com
Cc: lwoodman@redhat.com
Cc: atheurer@redhat.com
Link: http://lkml.kernel.org/r/1408133138-22048-2-git-send-email-riel@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sys.c')
0 files changed, 0 insertions, 0 deletions