linux-kernel - Re: [PATCH] Fix potential interrupts during alternative patching [was Re: [RFC] Avoid PIT SMP lockups]

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Message-ID: <45373E92.1070200@vmware.com>
Date:	Thu, 19 Oct 2006 02:00:02 -0700
From:	Zachary Amsden <zach@...are.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	caglar@...dus.org.tr, Andi Kleen <ak@...e.de>,
	lkml <linux-kernel@...r.kernel.org>,
	Virtualization Mailing List <virtualization@...ts.osdl.org>,
	Greg KH <greg@...ah.com>, Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH] Fix potential interrupts during alternative patching
 [was	Re: [RFC] Avoid PIT SMP lockups]

Jeremy Fitzhardinge wrote:
> Zachary Amsden wrote:
>> So this patch is an obvious bugfix - please apply, and to stable as 
>> well. I'm not sure when this broke, but taking interrupts in the 
>> middle of self modifying code is not a pretty sight.
>
> I had actually seen this when I built the Xen paravirt kernel with SMP 
> on, but I assumed it was something in the pv_ops tree rather than 
> mainline...

Very likely to show up in qemu as well, if you use that.
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