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SubjectRe: [rfc patch v2] rt,nohz_full: fix nohz_full for PREEMPT_RT_FULL
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On Fri, 2015-04-10 at 16:15 +0200, Sebastian Andrzej Siewior wrote:
> * Mike Galbraith | 2015-03-13 05:53:25 [+0100]:
>
> > First of all, a task being ticked and trying to shut the tick down
> > will
> > fail to do so due to having just awakened ksoftirqd, so let
> > ksoftirqd
> > try to do that after SOFTIRQ_TIMER processing. Secondly, should
> > the
> > tick be shut down, we may livelock in hrtimer-cancel() because in -
> > rt
> > a callback may be running. Break the loop, and let
> > tick_nohz_restart()
> > know that the timer is busy so it can bail.
>
> So with this patch
> http://marc.info/?l=linux-rt-users&m=142866940327602&w=2

Oh duh, too much of a hurry, I'll give that a spin.

-Mike


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