From: Vivek Goyal <vgoyal@redhat.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Heinz Diehl <htd@fancy-poultry.org>,
linux-kernel@vger.kernel.org, jaxboe@fusionio.com,
nauman@google.com, dpshah@google.com, guijianfeng@cn.fujitsu.com,
jmoyer@redhat.com, czoccolo@gmail.com
Subject: Re: [RFC PATCH] cfq-iosched: IOPS mode for group scheduling and new group_idle tunable
Date: Mon, 26 Jul 2010 09:54:11 -0400 [thread overview]
Message-ID: <20100726135410.GD12449@redhat.com> (raw)
In-Reply-To: <20100726134818.GA26544@infradead.org>
On Mon, Jul 26, 2010 at 09:48:18AM -0400, Christoph Hellwig wrote:
> 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.
Hmm.., interesting. So somewhere WRITE_SYNC idling in CFQ is hurting XFS
performance also. This time for some other reason and not jbd/jbd2.
Vivek
next prev parent reply other threads:[~2010-07-26 13:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-22 21:29 [RFC PATCH] cfq-iosched: IOPS mode for group scheduling and new group_idle tunable Vivek Goyal
2010-07-22 21:29 ` [PATCH 1/5] cfq-iosched: Do not idle on service tree if slice_idle=0 Vivek Goyal
2010-07-22 21:29 ` [PATCH 2/5] cfq-iosched: Implment IOPS mode for group scheduling Vivek Goyal
2010-07-27 5:47 ` Gui Jianfeng
2010-07-27 13:09 ` Vivek Goyal
2010-07-22 21:29 ` [PATCH 3/5] cfq-iosched: Implement a tunable group_idle Vivek Goyal
2010-07-22 21:29 ` [PATCH 4/5] cfq-iosched: Print number of sectors dispatched per cfqq slice Vivek Goyal
2010-07-22 21:29 ` [PATCH 5/5] cfq-iosched: Documentation update Vivek Goyal
2010-07-22 21:36 ` Randy Dunlap
2010-07-23 20:22 ` Vivek Goyal
2010-07-23 14:03 ` [RFC PATCH] cfq-iosched: IOPS mode for group scheduling and new group_idle tunable Heinz Diehl
2010-07-23 14:13 ` Vivek Goyal
2010-07-23 14:56 ` Heinz Diehl
2010-07-23 18:37 ` Vivek Goyal
2010-07-24 8:06 ` Heinz Diehl
2010-07-26 13:43 ` Vivek Goyal
2010-07-26 13:48 ` Christoph Hellwig
2010-07-26 13:54 ` Vivek Goyal [this message]
2010-07-26 16:15 ` Heinz Diehl
2010-07-26 14:13 ` Christoph Hellwig
2010-07-27 7:48 ` Heinz Diehl
2010-07-28 20:22 ` Vivek Goyal
2010-07-28 23:57 ` Christoph Hellwig
2010-07-29 4:34 ` cfq fsync patch testing results (Was: Re: [RFC PATCH] cfq-iosched: IOPS mode for group scheduling and new group_idle tunable) Vivek Goyal
2010-07-29 14:56 ` Vivek Goyal
2010-07-29 19:39 ` Jeff Moyer
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