linux-kernel - Re: RFC: Self-snapshotting in Linux

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Date:	Sat, 19 Apr 2008 17:42:32 +0100
From:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
To:	Pavel Machek <pavel@....cz>
CC:	linux-kernel@...r.kernel.org
Subject: Re: RFC: Self-snapshotting in Linux

Pavel Machek wrote:
> On Wed 2008-04-16 14:50:46, Alan Jenkins wrote:
>   
>> Pavel Machek wrote:
>>     
>>>> I guess there is the hardware / drivers issue.  I would like to claim
>>>> I've found hibernation to be reliable but unfortunately that's not
>>>> 100% true.
>>>>     
>>>>         
>>> So debug it, it is open source after all. Or at least file a bugs.
>>>   
>>>       
>> I definitely want to debug it; I love hibernating.  It's a regression and 
>> it'll affect my distro kernel once I upgrade to Ubuntu Hardy.
>>
>> <http://bugzilla.kernel.org/show_bug.cgi?id=10196> "Backtraces during 
>> hibernate / resume".
>>
>> I posted the backtraces but nobody could tell me what they were - they 
>> don't actually say whether they're OOPs or BUGs etc.  They might be 
>> softlockups - some times I got softlockup warnings, though thats not in the 
>> log I posted.
>>     
>
> Not sure what that is, I never seen that before.
>
> Can you try vanilla 2.6.25-rc9 or something?
>   
I've just retested with 2.6.25.  I reproduced the hang that happens
after (otherwise successful) hibernation.  After a second hibernation &
resume I reproduced the mysterious call-traces.

I posted this information, a full system log (including 2 hibernation
cycles and the calltraces), and the kernel config to the bugzilla entry.

This was in response to Rafael's request on the bugzilla.  So I expect
someone will look at it anyway, but I thought I should copy you on this.

Thanks,

Alan
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