linux-kernel - Re: Linux 2.6.35.3

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Date:	Sun, 22 Aug 2010 18:31:07 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Mark Stanovich <mrktimber@...il.com>
CC:	torvalds@...ux-foundation.org, gregkh@...e.de,
	linux-kernel@...r.kernel.org
Subject: Re: Linux 2.6.35.3

On 08/20/2010 09:06 PM, Mark Stanovich wrote:
>>>
>>> I noticed that the latest version pulled from Linus's git tree did not
>>> have the problem.  After looking at the changes to
>>> arch/x86/include/asm/cmpxchg_32.h, I cherry-picked two patches from
>>> Linus's tree that seemed to make a difference, namely:
>>>
>>> 69309a05907546fb686b251d4ab041c26afe1e1d
>>> 4532b305e8f0c238dd73048068ff8a6dd1380291
>>>
>>> Applying these patches solved the rebooting problem on 2.6.35.3
>>>
>>> I believe the same problem also happens for the latest stable version of
>>> 2.6.34, but did not verify the fix worked for the 2.6.34 stable releases.
>>>
>>> I don't know if this is helpful, but I thought I would let you know in
>>> case someone else is having the same problem.
>>>
>>> If you need any further information, just let me know.
>>>
>>
>> Yes, as a matter of fact, we have been trying to root-cause this
>> problem; please see:
>>
>> https://bugzilla.kernel.org/show_bug.cgi?id=16612
>>
>> If you could try the one-liner in there and see if it solves your
>> problem, it would be great.
> 
> The patch for __set_64bit on top of 2.6.35.3 solves the rebooting problem!
> 
> 

By the way, I think only 69309a05907546fb686b251d4ab041c26afe1e1d should
solve the problem.  Mark, could you try only this patch?

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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