From: Chris Mason <chris.mason@oracle.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Eric Sandeen <sandeen@redhat.com>,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, jamie@shareable.org
Subject: Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes
Date: Mon, 19 May 2008 09:26:41 -0400 [thread overview]
Message-ID: <200805190926.41970.chris.mason@oracle.com> (raw)
In-Reply-To: <87ej7zcrqv.fsf@basil.nowhere.org>
On Sunday 18 May 2008, Andi Kleen wrote:
> Andrew Morton <akpm@linux-foundation.org> writes:
> > On Fri, 16 May 2008 14:02:46 -0500
> >
> > Eric Sandeen <sandeen@redhat.com> wrote:
> >> A collection of patches to make ext3 & 4 use barriers by
> >> default, and to call blkdev_issue_flush on fsync if they
> >> are enabled.
> >
> > Last time this came up lots of workloads slowed down by 30% so I
> > dropped the patches in horror.
>
> Didn't ext4 have some new checksum trick to avoid them?
I didn't think checksumming avoided barriers completely. Just the barrier
before the commit block, not the barrier after.
-chris
next prev parent reply other threads:[~2008-05-19 13:29 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-16 19:02 [PATCH 0/4] (RESEND) ext3[34] barrier changes Eric Sandeen
2008-05-16 19:05 ` [PATCH 1/4] ext3: enable barriers by default Eric Sandeen
2008-05-19 8:58 ` Pavel Machek
2008-05-16 19:07 ` [PATCH 2/4] ext3: call blkdev_issue_flush on fsync Eric Sandeen
2008-05-16 22:15 ` Jamie Lokier
2008-05-16 19:08 ` [PATCH 3/4] ext4: enable barriers by default Eric Sandeen
2008-05-16 19:09 ` [PATCH 4/4] ext4: call blkdev_issue_flush on fsync Eric Sandeen
2008-05-20 2:34 ` Theodore Tso
2008-05-20 15:43 ` Jamie Lokier
2008-05-20 15:43 ` Jamie Lokier
2008-05-20 15:52 ` Eric Sandeen
2008-05-20 15:52 ` Eric Sandeen
2008-05-20 15:52 ` Eric Sandeen
2008-05-20 20:14 ` Jens Axboe
2008-05-20 19:54 ` Jens Axboe
2008-05-20 19:54 ` Jens Axboe
2008-05-20 22:02 ` Jamie Lokier
2008-05-21 7:30 ` Jens Axboe
2008-05-16 20:05 ` [PATCH 0/4] (RESEND) ext3[34] barrier changes Andrew Morton
2008-05-16 20:53 ` Eric Sandeen
2008-05-16 20:58 ` Andrew Morton
2008-05-16 21:45 ` Jamie Lokier
2008-05-16 22:03 ` Eric Sandeen
2008-05-16 22:09 ` Jamie Lokier
2008-05-16 22:03 ` Jamie Lokier
2008-05-16 22:21 ` Eric Sandeen
2008-05-16 22:53 ` Jamie Lokier
2008-05-17 0:20 ` Theodore Tso
2008-05-17 0:35 ` Andrew Morton
2008-05-17 13:43 ` Theodore Tso
2008-05-17 17:59 ` Andreas Dilger
2008-05-17 17:59 ` Andreas Dilger
2008-05-17 17:59 ` Andreas Dilger
2008-05-17 20:44 ` Theodore Tso
2008-05-20 14:45 ` Jamie Lokier
2008-05-20 14:45 ` Jamie Lokier
2008-05-18 0:48 ` Chris Mason
2008-05-18 1:36 ` Theodore Tso
2008-05-18 14:49 ` Ric Wheeler
2008-05-18 14:49 ` Ric Wheeler
2008-05-20 14:42 ` Jamie Lokier
2008-05-20 23:48 ` Jamie Lokier
2008-05-18 14:49 ` Ric Wheeler
[not found] ` <4830420D.4080608__28835.4277647615$1211137279$gmane$org@gmail.com>
2008-05-18 19:59 ` Andi Kleen
2008-05-18 16:07 ` Ric Wheeler
2008-05-20 23:44 ` Jamie Lokier
2008-05-18 20:03 ` Andi Kleen
2008-05-19 0:43 ` Theodore Tso
2008-05-19 2:29 ` Eric Sandeen
2008-05-19 2:29 ` Eric Sandeen
2008-05-19 2:29 ` Eric Sandeen
2008-05-19 4:11 ` Andrew Morton
2008-05-19 17:16 ` Chris Mason
2008-05-19 18:39 ` Chris Mason
2008-05-19 22:39 ` Jan Kara
2008-05-20 0:29 ` Chris Mason
2008-05-20 3:29 ` Timothy Shimmin
2008-05-20 12:04 ` Chris Mason
2008-05-20 8:25 ` Jens Axboe
2008-05-20 12:17 ` Chris Mason
2008-05-21 11:22 ` Pavel Machek
2008-05-21 12:32 ` Theodore Tso
2008-05-21 18:03 ` Andrew Morton
2008-05-21 18:15 ` Eric Sandeen
2008-05-21 19:43 ` Jamie Lokier
2008-05-21 18:29 ` Theodore Tso
2008-05-21 18:49 ` Andrew Morton
2008-05-21 19:42 ` Jamie Lokier
2008-05-21 19:36 ` Jamie Lokier
2008-05-21 19:36 ` Jamie Lokier
2008-05-21 19:40 ` Chris Mason
2008-05-21 19:36 ` Jamie Lokier
2008-05-21 19:54 ` Jamie Lokier
2008-05-20 14:58 ` Jamie Lokier
2008-05-21 22:30 ` Daniel Phillips
2008-05-20 23:35 ` Jamie Lokier
2008-05-19 0:28 ` Theodore Tso
2008-05-20 15:13 ` Jamie Lokier
2008-05-20 15:13 ` Jamie Lokier
2008-05-21 20:25 ` Greg Smith
2008-05-20 15:13 ` Jamie Lokier
2008-05-16 22:30 ` Jamie Lokier
2008-05-18 19:54 ` Andi Kleen
2008-05-19 13:26 ` Chris Mason [this message]
2008-05-19 14:46 ` Theodore Tso
2008-05-20 2:51 ` [PATCH, RFC] ext4: Fix use of write barrier in commit logic Theodore Tso
2008-05-20 2:51 ` Theodore Tso
2008-05-20 15:23 ` Jamie Lokier
2008-05-20 15:23 ` Jamie Lokier
2008-05-20 15:23 ` Jamie Lokier
2008-05-20 2:51 ` Theodore Tso
2008-05-23 18:33 ` [PATCH 0/4] (RESEND) ext3[34] barrier changes Ric Wheeler
2008-05-23 18:33 ` Ric Wheeler
2008-05-23 18:33 ` Ric Wheeler
2008-05-20 15:36 ` Jamie Lokier
2008-05-20 16:02 ` Chris Mason
2008-05-20 16:27 ` Jamie Lokier
2008-05-20 17:08 ` Chris Mason
2008-05-20 22:26 ` Jamie Lokier
2008-05-19 9:04 ` Pavel Machek
2008-05-29 13:36 ` Eric Sandeen
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