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Date: Sat, 24 Mar 2012 13:04:01 -0400
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: LVM volume with XFS file system hanged
Message-ID: <20120324170401.GC21708@infradead.org>
References: <CANs4eSAs3B3qjMN=Z56-Y9HfXBsGNbJ_QD0hNmpYu8VcP-Ce8w@mail.gmail.com>
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To: Supratik Goswami <supratiksekhar@gmail.com>
Cc: xfs@oss.sgi.com

On Fri, Mar 23, 2012 at 02:19:05PM +0530, Supratik Goswami wrote:
> Hi
> 
> Our current system is running Ubuntu 10.04 with a the below kernel version.
> 
> root@ip-10-0-1-117:~# cat /etc/issue
> Ubuntu 10.04.4 LTS \n \l
> 
> root@ip-10-0-1-117:~# uname -a
> Linux ip-10-0-1-117 2.6.32-343-ec2 #45-Ubuntu SMP Tue Feb 14 18:18:17
> UTC 2012 x86_64 GNU/Linux
> 
> We have an LVM volume which is using XFS filesystem. We found the
> below call trace in /var/log/messages when it was unresponsive.
> 
> Can anyone please tell me what went wrong ?

Device mapper is hanging for some reason, and XFS waits for it to
finish.

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