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Re: Using debug and tracing features in 2.4.26

To: Craig Tierney <ctierney@xxxxxxxx>
Subject: Re: Using debug and tracing features in 2.4.26
From: Nathan Scott <nathans@xxxxxxx>
Date: Wed, 28 Apr 2004 15:52:26 +1000
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <1083086648.2374.15.camel@hpti9.fsl.noaa.gov>; from ctierney@HPTI.com on Tue, Apr 27, 2004 at 11:24:08AM -0600
References: <1083086648.2374.15.camel@hpti9.fsl.noaa.gov>
Sender: linux-xfs-bounce@xxxxxxxxxxx
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On Tue, Apr 27, 2004 at 11:24:08AM -0600, Craig Tierney wrote:
> I have enabled debugging and tracing features in XFS
> using the 2.4.26 kernel.  When I load the xfs module,
> it reports that tracing and debugging are enabled.
> 
> (From dmesg)
> SGI XFS with tracing, debug enabled
> SGI XFS Quota Management subsystem
> 
> To enable tracing, the Configure.help file says to set
> /proc/sys/vm/pagebuf/debug.  However, I could not find this

thats a slightly out-of-date doc - that variable no longer
exists.  i need to update Marcelo's tree for that.

> Also, with debugging enabled, do all debug messages go to the
> kernel log?

you really want kdb enabled if you use debug/tracing, else
its not overly useful.  then you'll need a serial console
too.  there aren't much in the way of debug messages, its
more to provide a whole lot of runtime consistency checks.

cheers.

-- 
Nathan


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