Re: [BUG] TASK_DEAD task is able to be woken up in special condition

Ingo Molnar
2012-01-26T09:40:06Z

* Peter Zijlstra <peterz@infradead.org> wrote:

> > It can generate delays at the exact same place, and can
> > generate much longer delays than an SMI, if a high-prio RT
> > task comes along.
>
> No it can't, since do_exit() plays silly games with
> preempt_disable().

ok, it being a critical section on both -rt and vanilla upstream
explains it.

Thanks,

Ingo