diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2014-04-07 15:38:45 -0700 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2019-05-02 18:19:12 +0200 |
| commit | 51686ea524ce5504812a369b2c1e33256a34ad1c (patch) | |
| tree | 3d82bbe6ec1b1bd447d4b931284fe5152b9c3c5b /kernel/exit.c | |
| parent | 7ee48c4c48b6d7f9104f1e34dc5904c88602e397 (diff) | |
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.
Change-Id: I4bb64edf3b22a827899b059eaffd1b030e8c1e3e
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/exit.c')
| -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 1ccf4e746..1488a0090 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1367,7 +1367,12 @@ 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; @@ -1385,10 +1390,6 @@ 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 |