linux-kernel - Re: [PATCH] sched: Calculate effective load even if local weight is 0

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Date:	Mon, 06 Jan 2014 09:00:33 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>, Mel Gorman <mgorman@...e.de>
CC:	Thomas Hellstrom <thellstrom@...are.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched: Calculate effective load even if local weight
 is 0

On 01/06/2014 07:35 AM, Peter Zijlstra wrote:
> On Mon, Jan 06, 2014 at 11:39:12AM +0000, Mel Gorman wrote:
>> wake_affine uses a weight of 0 for sync wakeups on the grounds that it
>> is assuming the waking task will sleep and not contribute to load in the
>> near future. In this case, we still want to calculate the effective load
>> of the sched entity hierarchy. As effective_load is no longer used by
>> task_numa_compare since commit fb13c7ee (sched/numa: Use a system-wide
>> search to find swap/migration candidates), this patch simply restores the
>> historical behaviour.
> 
> Urgh.. yeah. We should merge this. Rik you ok with me adding a from and
> sob from you?

Yes, please do :)

Signed-off-by: Rik van Riel <riel@...hat.com>


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