linux-kernel - Re: [PATCH] Fix dirty page accounting in redirty_page_for

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Message-ID: <alpine.DEB.1.10.0904301114440.4028@qirst.com>
Date:	Thu, 30 Apr 2009 11:25:39 -0400 (EDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, thomas.pi@...or.dea,
	Yuriy Lalym <ylalym@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	ltt-dev@...ts.casi.polymtl.ca, Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH] Fix dirty page accounting in
 redirty_page_for_writepage()

On Thu, 30 Apr 2009, Ingo Molnar wrote:

> Could you cite a specific example / situation where you'd use __xxx
> ops?

Well the cpu alloc v3 patchset (already cited) included numerous
locations. Sure wish we could move much of the core stats over to percpu
ops. Here is a list of some stats patches that do not need irq disable.

http://article.gmane.org/gmane.linux.kernel.cross-arch/1128
http://article.gmane.org/gmane.linux.kernel.cross-arch/1132
http://article.gmane.org/gmane.linux.kernel.cross-arch/1134
http://article.gmane.org/gmane.linux.kernel.cross-arch/1138
http://article.gmane.org/gmane.linux.kernel.cross-arch/1139
http://article.gmane.org/gmane.linux.kernel.cross-arch/1145 VM stats
http://article.gmane.org/gmane.linux.kernel.cross-arch/1160 NFS stats
http://article.gmane.org/gmane.linux.kernel.cross-arch/1161 Genhd stats
http://article.gmane.org/gmane.linux.kernel.cross-arch/1163 Socket inuse counter
http://article.gmane.org/gmane.linux.kernel.cross-arch/1164 SRCU

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