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

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Message-ID: <453730B7.3040906@vmware.com>
Date:	Thu, 19 Oct 2006 01:00:55 -0700
From:	Zachary Amsden <zach@...are.com>
To:	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: [PATCH] Fix potential interrupts during alternative patching [was
 Re: [RFC] Avoid PIT SMP lockups]

S.Çağlar Onur wrote:
> 17 Eki 2006 Sal 01:21 tarihinde, S.Çağlar Onur şunları yazmıştı: 
>   
>> 17 Eki 2006 Sal 01:17 tarihinde, Zachary Amsden şunları yazmıştı:
>>     
>>> My nasty quick patch might not apply - the only tree I've got is a very
>>> hacked 2.6.18-rc6-mm1+local-patches thing, but the fix should be obvious
>>> enough.
>>>       
>> Ok, I'll test and report back...
>>     
>
> Both 2.6.18 and 2.6.18.1 boots without any problem (and of course without 
> noreplacement workarund) with that patch.
>
> Cheers
>   

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.

Zach

View attachment "hotfix-alternative-irq-safety.patch" of type "text/plain" (1303 bytes)