linux-kernel - Re: 2.6.31+2.6.31.4: XFS - All I/O locks up to D-state after 24-48 hours (sysrq-t+w available)

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Message-ID: <alpine.DEB.2.00.0910221849001.24576@p34.internal.lan>
Date:	Thu, 22 Oct 2009 18:49:46 -0400 (EDT)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Dave Chinner <david@...morbit.com>
cc:	linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
	xfs@....sgi.com, Alan Piszcz <ap@...arrain.com>
Subject: Re: 2.6.31+2.6.31.4: XFS - All I/O locks up to D-state after 24-48
 hours (sysrq-t+w available)



On Wed, 21 Oct 2009, Justin Piszcz wrote:

>
>
> On Tue, 20 Oct 2009, Justin Piszcz wrote:
>
>
>> 
>> 
>> On Tue, 20 Oct 2009, Dave Chinner wrote:
>> 
>>> On Mon, Oct 19, 2009 at 06:18:58AM -0400, Justin Piszcz wrote:
>>>> On Mon, 19 Oct 2009, Dave Chinner wrote:
>>>>> On Sun, Oct 18, 2009 at 04:17:42PM -0400, Justin Piszcz wrote:
>>>>>> It has happened again, all sysrq-X output was saved this time.
>>>>> .....
>>>>> 
>>>>> All pointing to log IO not completing.
>>>>> 
>>> ....
>>>> So far I do not have a reproducible test case,
>>> 
>>> Ok. What sort of load is being placed on the machine?
>> Hello, generally the load is low, it mainly serves out some samba shares.
>> 
>>> 
>>> It appears that both the xfslogd and the xfsdatad on CPU 0 are in
>>> the running state but don't appear to be consuming any significant
>>> CPU time. If they remain like this then I think that means they are
>>> stuck waiting on the run queue.  Do these XFS threads always appear
>>> like this when the hang occurs? If so, is there something else that
>>> is hogging CPU 0 preventing these threads from getting the CPU?
>> Yes, the XFS threads show up like this on each time the kernel crashed.  So 
>> far
>> with 2.6.30.9 after ~48hrs+ it has not crashed.  So it appears to be some 
>> issue
>> between 2.6.30.9 and 2.6.31.x when this began happening.  Any 
>> recommendations
>> on how to catch this bug w/certain options enabled/etc?
>> 
>> 
>>> 
>>> Cheers,
>>> 
>>> Dave.
>>> -- 
>>> Dave Chinner
>>> david@...morbit.com
>>> 
>> 
>
> Uptime with 2.6.30.9:
>
> 06:18:41 up 2 days, 14:10, 14 users,  load average: 0.41, 0.21, 0.07
>
> No issues yet, so it first started happening in 2.6.(31).(x).
>
> Any further recommendations on how to debug this issue?  BTW: Do you view 
> this
> as an XFS bug or MD/VFS layer issue based on the logs/output thus far?
>
> Justin.
>
>

Any other ideas?

Currently stuck on 2.6.30.9.. (no issues, no lockups)-- Box normally has 
no load at all either.. Has anyone else reported similar problems?

Justin.
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