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Date:	Thu, 23 Feb 2012 12:04:45 -0800
From:	Venki Pallipadi <>
To:	Peter Zijlstra <>
Cc:	Ingo Molnar <>, Thomas Gleixner <>,
	Ingo Molnar <>,
	"H. Peter Anvin" <>,
	Suresh Siddha <>,
	Aaron Durbin <>,
	Paul Turner <>,
	Yong Zhang <>,
Subject: Re: [PATCH] Extend mwait idle to optimize away CAL and RES interrupts
 to an idle CPU -v1

[ Resending without the ugly email client formatting ]

On Thu, Feb 23, 2012 at 1:08 AM, Peter Zijlstra <> wrote:
> On Thu, 2012-02-23 at 08:50 +0100, Ingo Molnar wrote:
>> * Venkatesh Pallipadi <> wrote:
>> > * We can also eliminate TS_POLLING flag in favor of this. But, that will have
>> >   a lot more touchpoints and better done as a standlone change.
>> Should most definitely be done for this series to be acceptble -
>> as a preparatory patch in the series, with the feature at the
>> end of the series.
> I don't think you can, TS_POLLING still works for idle=poll, whereas
> this new stuff requires monitor/mwait.

Even poll_idle should be able to use this ipiless_wakeup. It just have
to poll for an additional IPI_PENDING bit along with need_resched.
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