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Date: Thu, 26 May 2005 14:35:44 -0400
From: Wolfgang Wander <wwc@rentec.com>
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To: Lee Revell <rlrevell@joe-job.com>
CC: Borislav Petkov <petkov@uni-muenster.de>, pharon@gmail.com,
       linux-kernel@vger.kernel.org, Andrew Morton <akpm@osdl.org>
Subject: Re: 2.6.12-rc5-mm1 alsa oops
References: <1117092768.26173.4.camel@localhost>	 <200505261944.50942.petkov@uni-muenster.de>	 <1117130470.5477.5.camel@mindpipe>	 <200505262012.45833.petkov@uni-muenster.de> <1117132339.5477.20.camel@mindpipe>
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Lee Revell wrote:
> On Thu, 2005-05-26 at 20:12 +0200, Borislav Petkov wrote:
> 
>>On Thursday 26 May 2005 20:01, Lee Revell wrote:
>>
>>>On Thu, 2005-05-26 at 19:44 +0200, Borislav Petkov wrote:
>>>
>>>><snip>
>>>>
>>>>Andrew,
>>>>
>>>>similar oopses as the one I'm replying to all over the place. At it
>>>>happens m in snd_pcm_mmap_data_close(). Here's a stack trace:
>>>
>>>No one using ALSA CVS or any of the 1.0.9 release candidates ever
>>>reported this, but lots of -mm users are... does that help at all?  I
>>>suspect some upstream bug that ALSA just happens to trigger.
>>
>>yeah,
>>
>>this has to do with alsa indirectly. snd_pcm_mmap_data_close() accesses some 
>>vm_area_struct->vm_private_data and apparently there have been some 
>>optimizations to mmap code to avoid fragmentation of vma's so i think there's 
>>the problem. However, we'll need the smarter ones here :))
> 
> 
> Any idea which patches to back out?


avoiding-mmap-fragmentation-fix-2.patch

seems to do the trick. Ken will likely have a fix-3 shortly ;-)

             Wolfgang
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