[BISECTED] Regression: First hibernation attempt fails

[Alan Jenkins <alan-jenkins-cCz0Lq7MMjm9FHfhHBbuYA@public.gmane.org>]

Alan Jenkins wrote:
> Pavel Machek wrote:
>   
>> On Fri 2009-04-10 12:08:13, Alan Jenkins wrote:
>>   
>>     
>>> Pavel Machek wrote:
>>>     
>>>       
>>>> On Thu 2009-04-09 12:13:03, Alan Jenkins wrote:
>>>>   
>>>>       
>>>>         
>>>>> Yet another issue in 2.6.30-rc1 which was not present in 2.6.29 :-).  I
>>>>> wonder if it rings any bells?
>>>>>
>>>>> On my laptop (EEE 4G), the first attempt at hibernation fails. 
>>>>> Subsequent attempts succeed.
>>>>>
>>>>> If I use s2disk as normal, I see "snapshotting system", then before it
>>>>> gets to write out the image, it aborts and switches back to X.   I can't
>>>>> see any error message, even if I check the log with "dmesg".
>>>>>
>>>>> If I use "echo disk > /sys/power/state", echo reports the error "Cannot
>>>>> allocate memory".
>>>>>
>>>>> This only happens if I've logged in to X first.  In fact, I narrowed it
>>>>> down to gnome-power-manager.  If I kill gnome-power-manager beforehand,
>>>>> then it doesn't happen.
>>>>>         
>>>>>           
>>>> Anything interesting in dmesg?      
>>>>         

>>> Nothing obvious. I've attached my latest at
>>> <http://bugzilla.kernel.org/show_bug.cgi?id=13058>.
>>>       

Bisection succeeded:

1faa16d22877f4839bd433547d770c676d1d964c
"block: change the request allocation/congestion logic to be sync/async
based"

If I revert the commit, it fixes my bug.

Regards
Alan