Re: [Xen-devel] Re: [PATCH] CPUIDLE: shorten hpet spin_lock holding time

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 22/04/2010 09:19, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote:

>> Hm, let me see if I can come up with a patch for this and post it for you.
> 
> How about the attached patch? It MWAITs on a completely new flag field,
> avoiding the IPI-avoidance semantics of softirq_pending. It also folds in
> your patch. It also does wakeup-waiting checks on timer_deadline_start, that
> being the field that initiates wakeup via the MONITORed memory region.

...If you do think it looks okay, could you also test it out on relevant
hardware? :-)

 Thanks,
 Keir



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