Re: [PATCH 4/4] ARM: timer-sp: Set dynamic irq affinity

[Santosh Shilimkar]

On Wednesday 27 February 2013 10:29 AM, Viresh Kumar wrote:
> On 27 February 2013 10:26, Santosh Shilimkar <santosh.shilimkar@xxxxxx> wrote:
> > On Wednesday 27 February 2013 03:47 AM, Daniel Lezcano wrote:
> > > From: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> > >
> > > When a cpu goes to a deep idle state where its local timer is shutdown, it
> > > notifies the time frame work to use the broadcast timer instead.
> > >
> > > Unfortunately, the broadcast device could wake up any CPU, including an
> > > idle one
> > > which is not concerned by the wake up at all.
> > Broad-cast device will only open the CPU for which the timer IRQ
> > affined to. And infact with subject series the affinity also is
> > updated for the CPU which owns the last timer expiry event.
> >
> > What am I missing here ?
>
> Dynamic affinity will work only if the following flag is set for a
> clock_event_device: CLOCK_EVT_FEAT_DYNIRQ, otherwise wakeup
> would happen on the cpu to which static affinity was set to.
I should have looked at the patches in order first :)
Sorry for the noise.

Regards,
Santosh
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