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Re: server lock ups maybe XFS related - BUG: bad unlock balance detected

To: Max Veprinsky <max.veprinsky@xxxxxxxxxxxx>
Subject: Re: server lock ups maybe XFS related - BUG: bad unlock balance detected!
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Wed, 29 Jan 2014 07:05:49 +1100
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <CAGoO68jx6XgyEX3=GXy2icm0Ze65i_T4nVSv0ito8Kz6hP_jWg@xxxxxxxxxxxxxx>
References: <CAGoO68jx6XgyEX3=GXy2icm0Ze65i_T4nVSv0ito8Kz6hP_jWg@xxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Tue, Jan 28, 2014 at 12:32:28PM -0600, Max Veprinsky wrote:
> Hello everybody!
> 
> First time called, first time listener looking for help.
> In the past couple of months a Dell R900 has been locking up what
> seems to be at random intervals. This time the messages log has
> captured something that maybe of use to help sort out the issue, of
> course it could be not related at all.

Lockdep output is unrelated to the hang. The XFS code in that kernel
is missing an annotation in the code to silence the lockdep warning.

>  The server did not lockup until Jan 28 11:20

What does sysrq-w tell you when it locks up?

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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