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| author | Oleg Nesterov <oleg@redhat.com> | 2014-04-07 15:38:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-07 16:36:06 -0700 |
| commit | b3ab03160dfaf8ab78d476b670de319f4c1a5685 (patch) | |
| tree | 1ba7dbadf646e9d5c9939625a001e257ac91a12c /kernel | |
| parent | b436069059fede30ca31d4bf439cc86436ff5b1d (diff) | |
| download | lwn-b3ab03160dfaf8ab78d476b670de319f4c1a5685.tar.gz lwn-b3ab03160dfaf8ab78d476b670de319f4c1a5685.zip | |
wait: completely ignore the EXIT_DEAD tasks
Now that EXIT_DEAD is the terminal state it doesn't make sense to call
eligible_child() or security_task_wait() if the task is really dead.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Tested-by: Michal Schmidt <mschmidt@redhat.com>
Cc: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Lennart Poettering <lpoetter@redhat.com>
Cc: Roland McGrath <roland@hack.frob.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/exit.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 4773ed990907..33cf8dba0a61 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1329,7 +1329,12 @@ static int wait_task_continued(struct wait_opts *wo, struct task_struct *p) static int wait_consider_task(struct wait_opts *wo, int ptrace, struct task_struct *p) { - int ret = eligible_child(wo, p); + int ret; + + if (unlikely(p->exit_state == EXIT_DEAD)) + return 0; + + ret = eligible_child(wo, p); if (!ret) return ret; @@ -1347,10 +1352,6 @@ static int wait_consider_task(struct wait_opts *wo, int ptrace, return 0; } - /* dead body doesn't have much to contribute */ - if (unlikely(p->exit_state == EXIT_DEAD)) - return 0; - if (unlikely(p->exit_state == EXIT_TRACE)) { /* * ptrace == 0 means we are the natural parent. In this case |