From mboxrd@z Thu Jan  1 00:00:00 1970
From: cl@linux.com (Christoph Lameter)
Date: Thu, 30 Apr 2009 10:15:58 -0400 (EDT)
Subject: [ltt-dev] [PATCH] Fix dirty page accounting in
 redirty_page_for_writepage()
In-Reply-To: <20090430141446.GD14696@elte.hu>
References: <20090429232546.GB15782@Krystal>
	<alpine.LFD.2.00.0904291701450.22156@localhost.localdomain>
	<20090430024303.GB19875@Krystal>
	<alpine.DEB.1.10.0904300921290.22262@qirst.com>
	<20090430133859.GB8329@elte.hu>
	<alpine.DEB.1.10.0904300938220.22262@qirst.com>
	<20090430141446.GD14696@elte.hu>
Message-ID: <alpine.DEB.1.10.0904301013110.14178@qirst.com>

On Thu, 30 Apr 2009, Ingo Molnar wrote:

> The patch below makes the fallback/slowpath irq safe.

Yes but sometimes you are already irq safe and such a fallback would
create significant irq/enable/disable stack operations etc overhead for
architectures that are using the fallback.

I think we really need another __xxx op here. Especially since these
operations are often in critical code paths.