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Re: xfs deadlock on buffer semaphore while reading directory

To: xfs@xxxxxxxxxxx
Subject: Re: xfs deadlock on buffer semaphore while reading directory
From: Linda Walsh <xfs@xxxxxxxxx>
Date: Sat, 02 Feb 2013 22:35:55 -0800
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References: <20130202192007.GS30577@xxxxxxxxxxxxxxxxxx> <510D6EDE.1080409@xxxxxxx>
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Mark Tinguely wrote:
On 02/02/13 13:20, Andi Kleen wrote:

On a older 3.6-rc9 opensuse kernel I had the following deadlock with

That looks like a hang fixed by the series:

    http://oss.sgi.com/archives/xfs/2012-12/msg00071.html
----

That may be so -- I used to see things like that on some older
kernels with random progs but with traces down in xfs..

Seemed to be rare and not cause problems....but don't notice those any
more...

Odd thing about my current probs -- my current system has been
up 12 days...but before that it had been up 43 days...


I can't get the buffers to 'free' no matter what
echo 3> /proc/sys/vm/drop_caches does nothing.

so I may be rebooting soon...

The large number of from that log (was from 2/1 4:30am)
was that it was level 0 backup day....

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