linux-kernel - Re: [RFC PATCH] sched: Pass affine target cpu into wake

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Message-ID: <1262597105.6408.99.camel@laptop>
Date:	Mon, 04 Jan 2010 10:25:05 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	Mike Galbraith <efault@....de>,
	lkml <linux-kernel@...r.kernel.org>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
Subject: Re: [RFC PATCH] sched: Pass affine target cpu into wake_affine

On Mon, 2010-01-04 at 17:03 +0800, Lin Ming wrote:
> commit a03ecf08d7bbdd979d81163ea13d194fe21ad339
> Author: Lin Ming <ming.m.lin@...el.com>
> Date:   Mon Jan 4 14:14:50 2010 +0800
> 
>     sched: Pass affine target cpu into wake_affine
>     
>     Since commit a1f84a3(sched: Check for an idle shared cache in select_task_rq_fair()),
>     the affine target maybe adjusted to any idle cpu in cache sharing domains
>     instead of current cpu.
>     But wake_affine still use current cpu to calculate load which is wrong.
>     
>     This patch passes affine cpu into wake_affine.
>     

Does this at all help with that regression?

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