linux-kernel - Re: [RFC PATCH] cfq-iosched: IOPS mode for group scheduling and new group

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Message-ID: <20100726134818.GA26544@infradead.org>
Date:	Mon, 26 Jul 2010 09:48:18 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Heinz Diehl <htd@...cy-poultry.org>, linux-kernel@...r.kernel.org,
	jaxboe@...ionio.com, nauman@...gle.com, dpshah@...gle.com,
	guijianfeng@...fujitsu.com, jmoyer@...hat.com, czoccolo@...il.com,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [RFC PATCH] cfq-iosched: IOPS mode for group scheduling and new
 group_idle tunable

On Mon, Jul 26, 2010 at 09:43:29AM -0400, Vivek Goyal wrote:
> > Don't know if this is related, but I'm not quite shure if XFS (which I use
> > exclusively) uses the jbd/jbd2 journaling layer at all.
> 
> I also don't know. But because this patch is making a difference with your
> XFS file system performance, may be it does use.
> 
> CCing Christoph, he can tell us.

No, of course XFS doesn't use jbd.

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