linux-kernel - Re: 2.6.23-rc1 regression: mm: fix fault vs invalidate race for linear mappings

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Message-ID: <46A6E2EE.4040207@yahoo.com.au>
Date:	Wed, 25 Jul 2007 15:43:10 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Dave Airlie <airlied@...il.com>
CC:	Bret Towe <magnade@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.23-rc1 regression: mm: fix fault vs invalidate race for linear
 mappings

Dave Airlie wrote:
>>
>> Is this with a binary-only module? We saw an issue with that in SLES9
>> where the module is returning a locked page from its nopage handler
>> when it isn't really supposed to. It might be fixed in latest drivers,
>> have you tried them?
> 
> 
> Doesn't sound like it he mentions radeon drm module which is open...

OK. Well from the task trace, X is getting stuck on a locked page. And
as it is never getting unlocked, I'd be almost positive it comes from
a driver's nopage. I know some ATI driver did that in the past. Would
the radeon drm module do anything similar?

-- 
SUSE Labs, Novell Inc.
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