linux-kernel - Re: [EXT4 set 6][PATCH 1/1]Export jbd stats through procfs

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Date:	Fri, 30 Nov 2007 17:22:16 -0800
From:	Mingming Cao <cmm@...ibm.com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-ext4@...r.kernel.org
Subject: Re: [EXT4 set 6][PATCH 1/1]Export jbd stats through procfs

On Fri, 2007-11-30 at 17:08 -0600, Eric Sandeen wrote:
> Mingming Cao wrote:
> > [PATCH] jbd2 stats through procfs
> > 
> > The patch below updates the jbd stats patch to 2.6.20/jbd2.
> > The initial patch was posted by Alex Tomas in December 2005
> > (http://marc.info/?l=linux-ext4&m=113538565128617&w=2).
> > It provides statistics via procfs such as transaction lifetime and size.
> > 
> > [ This probably should be rewritten to use debugfs?   -- Ted]
> > 
> > Signed-off-by: Johann Lombardi <johann.lombardi@...l.net>
> 
> I've started going through this one to clean it up to the point where it
> can go forward.  It's been sitting at the top of the unstable portion of
> the patch queue for long enough, I think :)
> 
Thanks!

> I've converted the msecs to jiffies until the user boundary, changed the
> union #defines as suggested by Andrew, and various other little issues etc.
> 
> Remaining to do is a generic time-difference calculator (instead of
> jbd2_time_diff), and looking into whether it should be made a config
> option; I tend to think it should, but it's fairly well sprinkled
> through the code, so I'll see how well that works.
> 
> Also did we ever decided if this should go to debugfs?
> 

I thought it was decided to keep it on procfs as debugfs is not always
on...
> Thanks,
> 
> -Eric
> -
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