Messages in this thread | | | Date | Mon, 2 Nov 2015 17:36:54 +0100 | From | Oleg Nesterov <> | Subject | Re: WARNING in task_participate_group_stop |
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On 11/02, Oleg Nesterov wrote: > > On 11/02, Dmitry Vyukov wrote: > > > > But I wasn't able > > to figure out what's the root cause (why task does not have > > JOBCTL_STOP_PENDING) and maybe the same WARNING can be triggered > > without root and/or with other than init process. So still posting it > > here. > > Yes I think you are right. SIGSTOP can race with SIGKILL which (unlike SIGCONT) > doesn't clear JOBCTL_STOP_DEQUEUED/PENDING/etc.
I was wrong... I forgot that complete_signal(SIGKILL) sets SIGNAL_GROUP_EXIT. Unless SIGNAL_UNKILLABLE is set, and this is what makes init "special".
So it seems that everything is clear. Except I can't understand why your test-case doesn't work for me ;) It should.
Oleg.
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