On 01/12, Kohli, Gaurav wrote:
>
> HI Peter, Oleg,
>
> as per flag and state this seems to be possible only from below code:
Not sure I understand you,
> XXX: 0 1 0x40844c
> PF_NOFREEZE
> PF_RANDOMIZE
> PF_SIGNALED
> PF_FORKNOEXEC
> PF_EXITING
> PF_EXITPIDONE
>
> above state shows do_exit runs properely and if somehow after parked stated
> , TASK_WAKEKILL got set and signal_pending_state returns 1 in below case:
>
> switch_count = &prev->nivcsw;
> if (!preempt && prev->state) {
> if (unlikely(signal_pending_state(prev->state, prev))) {
> prev->state = TASK_RUNNING;
> } else {
> deactivate_task(rq, prev, DEQUEUE_SLEEP |
> DEQUEUE_NOCLOCK);
or task->state was TASK_RUNNING when __schedule() was called, or the deactivated
dead task was woken up later...
The only problem is that every case looks "obviously impossible" ;) I have no
idea whats going on, I can only suggest more stupid debugging patches which
might
narrow the problem.
Oleg.
