linux-kernel - Re: X-freeze after clflush changes [Was: 2.6.23-rc6-mm1]

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Message-ID: <46F3FF9C.7040200@gmail.com>
Date:	Fri, 21 Sep 2007 19:30:04 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	Valdis.Kletnieks@...edu
CC:	Matt Mackall <mpm@...enic.com>, Dave Airlie <airlied@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: X-freeze after clflush changes [Was: 2.6.23-rc6-mm1]

On 09/21/2007 07:16 PM, Valdis.Kletnieks@...edu wrote:
> On Thu, 20 Sep 2007 17:06:05 CDT, Matt Mackall said:
>> 2.6.23-rc3-mm1: solid lock on X shutdown (noticed when upgrading)
>>       -rc4-mm1: solid lock on X shutdown, random solid locks about
>>                 once every four hours
>>       -rc6-mm1: solid lock on X startup
>>    +your patch: screen goes black, turns off and on a few times during
>>                 startup, can reboot with sysrq-b
> 
> Hmm.. maybe I'm chasing a different bug manifested by the same patch.  For me,
> it's been a solid lockup at X startup since -rc3-mm1, and this patch doesn't
> change matters.

This patch probably changes behaviour how the pages are queued on the list
somehow. Maybe it's insane to suggest everybody with similar problem to try
LIST_DEBUG, but just give it a try after having one of the patches applied ;).
(Or have you tried yet?)

regards,
-- 
Jiri Slaby (jirislaby@...il.com)
Faculty of Informatics, Masaryk University
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