* Oleg Nesterov <[email protected]> wrote:
> (Compile tested).
>
> futex_find_get_task:
>
> if (p->state == EXIT_ZOMBIE || p->exit_state == EXIT_ZOMBIE)
> return NULL;
>
> I can't understand this. First, p->state can't be EXIT_ZOMBIE. The
> ->exit_state check looks strange too. Sub-threads or tasks whose
> ->parent ignores SIGCHLD go directly to EXIT_DEAD state (I am ignoring
> a ptrace case). Why EXIT_DEAD tasks should be ok? Yes, EXIT_ZOMBIE is
> more important (a task may stay zombie for a long time), but this
> doesn't mean we should explicitely ignore other EXIT_XXX states.
>
> Signed-off-by: Oleg Nesterov <[email protected]>
i believe this is a remnant of older times when EXIT_ZOMBIE was
introduced. We cloned that into the -rt tree, but then exit-state got
cleaned up (by you) upstream and that cleanup didnt propagate into the
-rt tree. Andrew: i think this is a must-have fix for v2.6.18.
Acked-by: Ingo Molnar <[email protected]>
Ingo
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