Message-ID: <1329227537.2293.1.camel@twins>
Subject: Re: [RFC] Extend mwait idle to optimize away IPIs when possible
From: Peter Zijlstra <peterz@infradead.org>
To: Yong Zhang <yong.zhang0@gmail.com>
Cc: Venki Pallipadi <venki@google.com>, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
        Suresh Siddha <suresh.b.siddha@intel.com>,
        Aaron Durbin <adurbin@google.com>, Paul Turner <pjt@google.com>,
        linux-kernel@vger.kernel.org
Date: Tue, 14 Feb 2012 14:52:17 +0100
In-Reply-To: <20120213053410.GB24636@zhy>
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On Mon, 2012-02-13 at 13:34 +0800, Yong Zhang wrote:
> Yeah, most of the things could be shared. Such as the added logic when
> return from idle and the hooks into ttwu_queue_remote() and
> generic_exec_single().
> 

The thing is, those last two should not have hooks. Nor am I convinced
anything outside of the arch idle loop should have any.


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