Re: [PATCH 0/4] cputime: Virtual cputime accounting small cleanups and consolidation

Peter Zijlstra
2012-06-21T08:31:04Z

On Thu, 2012-06-21 at 02:46 +0200, Frederic Weisbecker wrote:
> > So I understand why s390,ia64 want the sched hook, but I don't see why
> > ppc would need it, their account_process_tick() can fold whatever they
> > need on the tick.
>
> I think in any case you need to flush the time on a descheduling task otherwise
> its pending time will be accounted later to the next task when it
> receives an irq.
>
> So I fear we still need that sched switch hook even with per cpu data. This
> may be a simple account_system_vtime() call.

Did I miss a per-task something in there?