Message-ID: <4F308243.8030003@zytor.com>
Date: Mon, 06 Feb 2012 17:45:39 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: David Daney <ddaney.cavm@gmail.com>
CC: Venkatesh Pallipadi <venki@google.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        Suresh Siddha <suresh.b.siddha@intel.com>,
        Aaron Durbin <adurbin@google.com>, Paul Turner <pjt@google.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] Extend mwait idle to optimize away IPIs when possible
References: <1328560933-3037-1-git-send-email-venki@google.com> <4F306FAF.7020500@cavium.com> <4F307D45.1050404@zytor.com> <4F307FB3.4030700@gmail.com>
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On 02/06/2012 05:34 PM, David Daney wrote:
>
> Well I don't know that part. The gist of my comment was to get rid of an
> unneeded new config variable.
>
> If this works just as well for 32-bit, then by all means do it there too.
>
> In any event, I think you want the kernel to automatically do it if the
> CPU is capable, and not have a manual config setting you have to fiddle
> with.
>

If this is a transitional thing then it might justify it.

	-hpa

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