linux-kernel - [BISECTED] Re: [BUG] Linux-2.6.33 to 33-git9 intel_drm: drm_fb

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Date:	Wed, 10 Mar 2010 17:25:12 +0200
From:	Tarkan Erimer <tarkan@...knetserver.com>
To:	linux-kernel@...r.kernel.org
Subject: [BISECTED] Re: [BUG] Linux-2.6.33 to 33-git9 intel_drm: drm_fb_helper
 panic

  On 03/08/2010 03:56 PM, Tarkan Erimer wrote:
> On 03/04/2010 04:34 PM, Tarkan Erimer wrote:
>> When I booted into 2.6.33, hard lock up occurs via the following error
>> message at boot time :
>>
>> [drm:drm_fb_helper_panic] *ERROR* panic occured,  switching back to text
>> console
>> BUG: scheduling while atomic: init/1/0x00000002
>>
>> This is a KMS enabled kernel on i945 VGA. Also, I tried (I found after
>> googling a bit.)  with "i915.modeset=0 enable_mtrr_cleanup" and
>> "enable_mtrr_cleanup" kernel boot options. But, still the same error
>> occurs.
>>
>> This bug occurs on kernels from 2.6.33 to 2.6.33-git9. 2.6.33-rc8 works
>> fine. My .config attached.
>>
>> Tarkan
>>
> Anybody care to look at this issue ? BTW; it, still,  exist (tested few
> mins ago.) on .33-git14, too.
>
> Tarkan
>

Today, I bisected to find out the bad commit. Here is what I found :

83d90addc829ab56ace49b10fd7d5d415448aac4 is the first bad commit

commit 83d90addc829ab56ace49b10fd7d5d415448aac4
Merge: 75ef7cd 79da064
Author: Linus Torvalds<torvalds@...ux-foundation.org>
Date:   Wed Feb 24 07:42:42 2010 -0800

     Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

     * 'for-linus' of git://git.kernel.dk/linux-2.6-block:
       Revert "block: improve queue_should_plug() by looking at IO depths"



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