From: tytso@mit.edu
To: Jeff Moyer <jmoyer@redhat.com>
Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
jens.axboe@oracle.com, esandeen@redhat.com
Subject: Re: [patch/rft] jbd2: tag journal writes as metadata I/O
Date: Mon, 5 Apr 2010 17:01:33 -0400 [thread overview]
Message-ID: <20100405210133.GG23670@thunk.org> (raw)
In-Reply-To: <x49vdc5iqcz.fsf@segfault.boston.devel.redhat.com>
On Mon, Apr 05, 2010 at 04:41:48PM -0400, Jeff Moyer wrote:
> > Sorry, Ted, what I meant to say was that iozone showed differences
> > between deadline and cfq, where cfq's performance was much worse than
> > deadline's.
>
> And to be 100% clear, with the patch, the performance differences
> between deadline and cfq were in the noise.
Right, and since most people don't actually change the I/O scheduler
from cfq, this is basically a performance improvement patch, which is
how I'm going to describe it. :-)
- Ted
prev parent reply other threads:[~2010-04-05 21:01 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-01 19:04 [patch/rft] jbd2: tag journal writes as metadata I/O Jeff Moyer
2010-04-01 19:48 ` Jan Kara
2010-04-05 15:24 ` Jeff Moyer
2010-04-05 17:46 ` tytso
2010-04-06 15:20 ` Jan Kara
2010-04-06 18:25 ` Vivek Goyal
2010-04-06 18:45 ` tytso
2010-04-06 19:04 ` Jeff Moyer
2010-04-02 7:00 ` Jens Axboe
2010-04-05 17:52 ` tytso
2010-04-05 18:36 ` Jeff Moyer
2010-04-05 19:48 ` tytso
2010-04-05 20:34 ` Jeff Moyer
2010-04-05 20:41 ` Jeff Moyer
2010-04-05 21:01 ` tytso [this message]
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