linux-kernel - Re: [RFC patch 1/2] sched: dynamically adapt granularity with nr

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Message-Id: <1284363310.25120.34.camel@marge.simson.net>
Date:	Mon, 13 Sep 2010 09:35:10 +0200
From:	Mike Galbraith <efault@....de>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Tony Lindgren <tony@...mide.com>
Subject: Re: [RFC patch 1/2] sched: dynamically adapt granularity with
 nr_running

On Mon, 2010-09-13 at 09:08 +0200, Mike Galbraith wrote:

> Sticky wicket.  We need a better fork fairness gizmo.

Like maybe re-inventing O(1)'s fork penalty + return on exit instead of
START_DEBIT penalizing the child?  Child of lagging parent needs to run
NOW, just as any other lagging task wakeup, but fork/clone dare not be
an advantage.

	-Mike

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