linux-kernel - Re: [PATCH] Extend mwait idle to optimize away CAL and RES interrupts to an idle CPU -v1

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Message-ID: <1329988135.24994.43.camel@twins>
Date:	Thu, 23 Feb 2012 10:08:55 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Venkatesh Pallipadi <venki@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Aaron Durbin <adurbin@...gle.com>,
	Paul Turner <pjt@...gle.com>,
	Yong Zhang <yong.zhang0@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Extend mwait idle to optimize away CAL and RES
 interrupts to an idle CPU -v1

On Thu, 2012-02-23 at 08:50 +0100, Ingo Molnar wrote:
> * Venkatesh Pallipadi <venki@...gle.com> 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.

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