linux-kernel - Re: [PATCH] sched: wake up task on prev_cpu if not in SD_WAKE

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Message-ID: <1399694090.5146.13.camel@marge.simpson.net>
Date:	Sat, 10 May 2014 05:54:50 +0200
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Rik van Riel <riel@...hat.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, morten.rasmussen@....com,
	mingo@...nel.org, george.mccollister@...il.com,
	ktkhai@...allels.com
Subject: Re: [PATCH] sched: wake up task on prev_cpu if not in
 SD_WAKE_AFFINE domain with cpu

On Fri, 2014-05-09 at 14:16 -0400, Rik van Riel wrote:

> That leaves the big question: do we want to fall back to
> prev_cpu if it is not idle, and it has an idle sibling,
> or would it be better to find an idle sibling of prev_cpu
> when we wake up a task?

Yes.  If there was A correct answer, this stuff would be a lot easier.

-Mike

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