linux-kernel - Re: Apparent Deadlock with nfsd/jfs on 2.6.21.1 under bonnie.

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Date:	Tue, 29 May 2007 13:10:15 -0500
From:	Dave Kleikamp <shaggy@...ux.vnet.ibm.com>
To:	Roger Heflin <rheflin@...pa.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Apparent Deadlock with nfsd/jfs on 2.6.21.1 under bonnie.

On Tue, 2007-05-29 at 12:16 -0500, Roger Heflin wrote:

> Dave,
> 
> Apparently there appears to be another different similar lockup,
> The MTBF has risen from 1-2 hours without that patch to >100 hours,
> so I am fairly sure the patch did correct the original lockup, or
> at the very least make it a lot less likely.
> 
> I hit the machine across NFS for 5 days before it deadlocked, before
> the patch I could only get an hour or two (2-4 different tries).
> 
> Given that pdflush is "D" it does not appear to be an NFS issue.
> 
> Included is the sysrq-t.
> 
> This is with 2.6.21.1 + the JFSIO patch.

Is the system still in this state?  Can you cat /proc/fs/jfs/TxAnchor
(if CONFIG_JFS_DEBUG is defined) and /proc/fs/jfs/txstats (if
CONFIG_JFS_STATISTICS is defined)?

Thanks,
Shaggy
-- 
David Kleikamp
IBM Linux Technology Center

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