linux-kernel - Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]

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Message-ID: <20070414064334.GA19463@elte.hu>
Date:	Sat, 14 Apr 2007 08:43:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Nick Piggin <npiggin@...e.de>
Cc:	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Con Kolivas <kernel@...ivas.org>,
	Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]


* Ingo Molnar <mingo@...e.hu> wrote:

> Nick noticed that upon fork we change parent->wait_runtime but we do 
> not requeue it within the rbtree.

this fix is not complete - because the child runqueue is locked here, 
not the parent's. I've fixed this properly in my tree and have uploaded 
a new sched-modular+cfs.patch. (the effects of the original bug are 
mostly harmless, the rbtree position gets corrected the first time the 
parent reschedules. The fix might improve heavy forker handling.)

	Ingo
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