linux-kernel - Re: Corrupted files after suspend to disk

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Date:	Wed, 07 Mar 2012 00:54:55 +0100
From:	Andreas Hartmann <andihartmann@...19freenet.de>
To:	linux-kernel@...r.kernel.org
Subject: Re: Corrupted files after suspend to disk

Andreas Hartmann schrieb:
> Rafael J. Wysocki schrieb:
>> On Friday, February 17, 2012, richard -rw- weinberger wrote:
>>> On Thu, Feb 16, 2012 at 11:26 PM, Alan Stern <stern@...land.harvard.edu> wrote:
>>>> On Thu, 16 Feb 2012, Rafael J. Wysocki wrote:
>>>>
>>>>>> FWIW, we've been seeing a number of hard to diagnose failures
>>>>>> with suspend to disk for the last few releases in Fedora.
>>>>>> Eric Sandeen has been chasing https://bugzilla.redhat.com/show_bug.cgi?id=744275
>>>>>> for a while, but there's no smoking gun that really explains what's
>>>>>> getting into these states. Further complicating things, is that it
>>>>>> doesn't seem to be 100% reproducable.
>>>>>
>>>>> I wonder if that's reproducible with the filesystems freezing patch I posted
>>>>> some time ago (it will need some rebasing to apply to the current mainline or
>>>>> 3.2.y).
>>>
>>> Where can I find this patch?
>>> I'll happily test it.
>>> But it may take some time as the bug is not easy to reproduce.
>>
>> This is the last version posted:
>>
>> http://marc.info/?l=linux-kernel&m=132775832509351&w=4
>>
>> However, it only may help if you use the kernel-based hibernation i.e.
>> "echo disk > /sys/power/state" (that may be worth testing without the
>> patch too, but Fedora is using this AFAICS, so it probably has that
>> problem too).
> 
> I'm having the same problem. Please take a look at the following bug
> report at suse for more information:
> 
> https://bugzilla.novell.com/show_bug.cgi?id=732908
> 
> Do you know, which way of suspending openSUSE uses in 12.1?

I changed SLEEP_MODULE="uswsusp" to "kernel" in
/usr/lib/pm-utils/defaults and tested your patch mentioned above with
linux 3.2.9.

Unfortunately the behaviour didn't change at all - I can see the same
problems as before.

I tested with and without X. I tested with the call "pm-hibernate" and
with "echo disk > /sys/power/state". I always could see the corrupted
files after 2 to 4 times of hibernating / resuming.


Kind regards,
Andreas
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