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Re: XFS hang during xfs_fsr run

To: Michael Weissenbacher <mw@xxxxxxxxxxxx>
Subject: Re: XFS hang during xfs_fsr run
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Thu, 4 Mar 2010 09:30:18 -0500
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <4B8FC1B7.3070505@xxxxxxxxxxxx>
References: <4B8F871C.60802@xxxxxxxxxxxx> <20100304112018.GG14317@xxxxxxxxxxxxxxxx> <4B8FA2CD.6010904@xxxxxxxxxxxx> <20100304131511.GH14317@xxxxxxxxxxxxxxxx> <20100304134641.GA26871@xxxxxxxxxxxxx> <4B8FC1B7.3070505@xxxxxxxxxxxx>
User-agent: Mutt/1.5.19 (2009-01-05)
On Thu, Mar 04, 2010 at 03:20:39PM +0100, Michael Weissenbacher wrote:
> Hi Christoph/Dave!
>> Also when you next rebuilt the kernel please make sure to include
>> CONFIG_KALLSYMS in the configuration, possibly CONFIG_KALLSYMS_ALL too.
>> This will help greatly with decoding any kind of warning / oops.
> Thanks for this information. Unfortunately my current kernel was built  
> without CONFIG_KALLSYMS. I'm now recompiling with CONFIG_KALLSYMS and  
> CONFIG_KALLSYMS_ALL set. I reckon that my old traces can't be  
> ksymoops'ed even if i enable that kernel option now? I will see if i can  
> get a fresh trace then (even though i hope it won't happen again).

There's an old userspace ksymoops tool which we used before kallysyms
was around.  I don't remember the exact usage, just that it was a real
pain.

> Whats's interesting is that i have the no-defrag flag set on the whole  
> /var/log directory and still it seemed to hang on that log file.

What no-defrag flag?

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