Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

[Peter Zijlstra]

On Mon, 2010-11-15 at 14:25 -0700, Mike Galbraith wrote:
> > > +   if (p->flags & PF_EXITING)
> > > +           return false;
> > 
> > Hmm, why? Perhaps PF_EXITING was needed in the previous version to
> > avoid the race with release_task(). But now it is always safe to
> > use signal->autogroup.
> 
> That came into existence when I stress tested previous version in
> PREEMPT_RT (boom).  I see no good reason to bother an exiting task
> though, so would prefer to leave it as is. 

PREEMPT_RT has a slightly different exit path IIRC. If that was the only
thing you saw it explode on we could leave the check out for now and
revisit it in the -rt patches when and if it pops up. Hmm?
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