linux-kernel - Re: 2.6.29 regression: ATA bus errors on resume

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Date:	Thu, 02 Apr 2009 13:03:38 +0200
From:	Niel Lambrechts <niel.lambrechts@...il.com>
To:	Tejun Heo <tj@...nel.org>
CC:	"linux.kernel" <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.29 regression: ATA bus errors on resume

On 04/02/2009 08:52 AM, Tejun Heo wrote:
> Niel Lambrechts wrote:
>   
>>> Attached is the debug patch.  Please reproduce the problem with the
>>> patch applied and post full kernel log.
>>>   
>>>       
>> Hi there,
>>
>> Here is the output, it took 2 attempts to reproduce the EXT4 corruption
>> (clean with errors).
>>     
>
> Strange.  Maybe IO commands are getting through while the sdev is
> still in quiesce state?  Can you please repeat the test with the
> attached patch?
>   
Hi Tejun,

Thanks for your help, I've done at least 5 hibernate cycles without the
problem recurring, I'll keep at it for a while... :)

For the sake of being thorough, I'd like to mention some of the
remaining issues/messages, but to be honest some of them were there
before and may not be relevant to your efforts:

1) Can you perhaps confirm if the remaining ATA messages are harmless
enough to ignore?

dmesg:
ata2: exception Emask 0x10 SAct 0x0 SErr 0x4050000 action 0x1e frozen
ata2: irq_stat 0x00400040, connection status changed
ata2: SError: { PHYRdyChg CommWake DevExch }
Clocksource tsc unstable (delta = -412838835 ns)

and in messages:
Apr  2 12:31:44 linux-7vph kernel: ata1: exception Emask 0x10 SAct 0x0
SErr 0x0 action 0x9 t4

2) The screen remains blank on resume, right until I both press a key
_and_ touch the touchpad. Weird, but this happens in 2.6.28.9 as well,
perhaps this is i915 related.

Thanks very much for sorting the more serious issue so quickly!

Regards,
Niel


View attachment "dmesg-p2.txt" of type "text/plain" (62856 bytes)

View attachment "resume-p2.txt" of type "text/plain" (13892 bytes)