Messages in this thread | | | Date | Sun, 19 Aug 2007 12:38:27 +0400 | From | Oleg Nesterov <> | Subject | Re: [RFC,PATCH 5/5] exec: RT sub-thread can livelock and monopolize CPU on exec |
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On 08/18, Roland McGrath wrote: > > Maybe it can use wait_task_inactive, which IIUC is being changed to address > the same RT issue.
The group_leader can sleep before it enters exit_notify(). In that case wait_task_inactive() returns, and we still need some polling to wait for EXIT_ZOMBIE.
> OTOH, notify_count exists only for this. So maybe the > better way is to clean that whole mechanism up somehow.
Yes sure. But in any case I think we should avoid polling, we need some notification from exit_notify().
> The exit.c changes > in your patch seem to be making it more mysterious rather than less so.
I completely agree.
Oleg.
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