Subject: Re: Apparent Deadlock with nfsd/jfs on 2.6.21.1 under bonnie.
From: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
To: Roger Heflin <rheflin@atipa.com>
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <465C5FDF.4070401@atipa.com>
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	 <pan.2007.05.15.22.03.07.359081@linux.vnet.ibm.com>
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	 <1179413287.13965.24.camel@kleikamp.austin.ibm.com>
	 <465C5FDF.4070401@atipa.com>
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Date: Tue, 29 May 2007 13:10:15 -0500
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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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