linux-kernel - Re: [patch] Re: scheduler oddity [bug?]

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Message-Id: <1236604563.6027.8.camel@marge.simson.net>
Date:	Mon, 09 Mar 2009 14:16:03 +0100
From:	Mike Galbraith <efault@....de>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Ingo Molnar <mingo@...e.hu>, Balazs Scheidler <bazsi@...abit.hu>,
	linux-kernel@...r.kernel.org, Willy Tarreau <w@....eu>
Subject: Re: [patch] Re: scheduler oddity [bug?]

On Mon, 2009-03-09 at 12:04 +0100, Peter Zijlstra wrote:

> OK, talked a bit with Ingo, the reason you're doing is that avg_overlap
> can easily grow stale.. I can see that happen indeed.
> 
> So the 'perfect' thing would be a task-runtime decay, barring that the
> preemption thing seems a sane enough hart-beat of a task.
> 
> How does the below look to you?

Other than the fact that the test for sync reject is currently
avg_overlap > sysctl_sched_migration_cost, looks fine to me.  Having it
capped at the boundary is probably the better way to go.

	-Mike

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