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

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Message-ID: <20140106123519.GK31570@twins.programming.kicks-ass.net>
Date:	Mon, 6 Jan 2014 13:35:19 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Thomas Hellstrom <thellstrom@...are.com>,
	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched: Calculate effective load even if local weight is 0

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?
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