linux-kernel - Re: [PATCH 2.6.20-rc4 1/4] futex priority based wakeup

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Message-ID: <45A3C2CE.7070500@redhat.com>
Date:	Tue, 09 Jan 2007 08:29:02 -0800
From:	Ulrich Drepper <drepper@...hat.com>
To:	Pierre Peiffer <pierre.peiffer@...l.net>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Dinakar Guniguntala <dino@...ibm.com>,
	Jean-Pierre Dion <jean-pierre.dion@...l.net>,
	Ingo Molnar <mingo@...e.hu>, Jakub Jelinek <jakub@...hat.com>,
	Darren Hart <dvhltc@...ibm.com>,
	Sébastien Dugué <sebastien.dugue@...l.net>
Subject: Re: [PATCH 2.6.20-rc4 1/4] futex priority based wakeup

Pierre Peiffer wrote:
> This patch makes use of plist (pirotity ordered lists) instead of simple
> list in
> futex_hash_bucket.

I have never seen performance numbers for this.  If it is punishing
existing code in a measurable way I think it's not anacceptable default
behavior.

-- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖


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