From mboxrd@z Thu Jan  1 00:00:00 1970
From: cl@linux.com (Christoph Lameter)
Date: Thu, 30 Apr 2009 14:07:01 -0400 (EDT)
Subject: [ltt-dev] [PATCH] Fix dirty page accounting in
 redirty_page_for_writepage()
In-Reply-To: <20090430172341.GA11865@elte.hu>
References: <20090430141446.GD14696@elte.hu>
	<alpine.DEB.1.10.0904301013110.14178@qirst.com>
	<20090430143819.GF14696@elte.hu>
	<alpine.DEB.1.10.0904301042170.4028@qirst.com>
	<20090430150142.GC20580@elte.hu>
	<alpine.DEB.1.10.0904301114440.4028@qirst.com>
	<20090430154255.GA3714@elte.hu>
	<alpine.DEB.1.10.0904301142140.4028@qirst.com>
	<20090430160606.GA5913@elte.hu>
	<alpine.LFD.2.00.0904300914110.3395@localhost.localdomain>
	<20090430172341.GA11865@elte.hu>
Message-ID: <alpine.DEB.1.10.0904301406210.11923@qirst.com>

On Thu, 30 Apr 2009, Ingo Molnar wrote:

> So we introduced preemption-safety in the v2 version of that commit.
>
> This non-atomicity will 1) either not matter 2) will be irq-atomic
> by virtue of being within a critical section 3) can be made atomic
> in the few remaining cases.
>
> And maybe, at most, introduce an opt-in API: percpu_add_irqsafe().

Plus percpu_add_preemptsafe().