linux-kernel - Re: preempt bug in set_pmd

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Message-ID: <20080304212821.GB8944@elte.hu>
Date:	Tue, 4 Mar 2008 22:28:21 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: preempt bug in set_pmd_pfn?


* Jeremy Fitzhardinge <jeremy@...p.org> wrote:

> I think set_pmd_pfn, which is only called by __set_fixmap, might have 
> a preempt bug in it.

yes, and we had similar preemption bugs in the past. I guess most places 
are either infrequent or have some natural atomicity anyway. Wanna send 
a patch?

	Ingo
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