From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Ray Lee <ray-lk@madrabbit.org>
Cc: Theodore Tso <tytso@mit.edu>, Sitsofe Wheeler <sitsofe@yahoo.com>,
"Andreas T.Auer" <andreas.t.auer_lkml_73537@ursus.ath.cx>,
Alberto Gonzalez <info@gnebu.es>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Ext4 and the "30 second window of death"
Date: Wed, 1 Apr 2009 22:26:00 +0100 [thread overview]
Message-ID: <20090401212600.GA18301@srcf.ucam.org> (raw)
In-Reply-To: <2c0942db0904011421w58c0c2dyb70235fb739cbd30@mail.gmail.com>
On Wed, Apr 01, 2009 at 02:21:43PM -0700, Ray Lee wrote:
> On Wed, Apr 1, 2009 at 10:43 AM, Matthew Garrett <mjg59@srcf.ucam.org> wrote:
> > I've got absolutely no idea why anyone would want fsync() to stop
> > meaning "Put my data on the disk please".
>
> Some guy named Andrew used to run a kernel with 'return 0' at the top
> of fsync and fdatasync: http://lkml.org/lkml/2007/4/27/88
>
> It's that the latency penalty of apps using *sync() on common hardware
> sucks. That's all, and finding a way to fix that would make this
> entire thread go away, I think.
And also disk spinups.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2009-04-01 21:26 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-29 10:24 Ext4 and the "30 second window of death" Alberto Gonzalez
2009-03-31 12:25 ` Theodore Tso
2009-03-31 12:52 ` Alberto Gonzalez
2009-03-31 13:45 ` Theodore Tso
2009-03-31 14:45 ` Alberto Gonzalez
2009-04-01 0:04 ` Theodore Tso
2009-04-01 1:14 ` Alberto Gonzalez
2009-03-31 22:02 ` Alberto Gonzalez
2009-03-31 23:22 ` Andreas T.Auer
2009-04-01 1:25 ` Alberto Gonzalez
2009-04-01 1:50 ` Theodore Tso
2009-04-01 5:20 ` Sitsofe Wheeler
2009-04-01 15:12 ` Matthew Garrett
2009-04-01 17:35 ` Theodore Tso
2009-04-01 17:43 ` Matthew Garrett
2009-04-01 21:21 ` Ray Lee
2009-04-01 21:26 ` Matthew Garrett [this message]
2009-04-02 11:25 ` Sitsofe Wheeler
2009-04-02 18:22 ` david
2009-04-02 18:29 ` Matthew Garrett
2009-04-02 18:44 ` david
2009-04-02 20:07 ` Ray Lee
2009-04-02 20:59 ` Andreas T.Auer
2009-04-02 23:38 ` Theodore Tso
2009-04-03 0:00 ` Matthew Garrett
2009-04-03 7:33 ` Pavel Machek
2009-04-03 8:14 ` Andreas T.Auer
2009-04-02 22:36 ` Bron Gondwana
2009-04-02 23:46 ` Matthew Garrett
2009-04-03 0:55 ` david
2009-04-03 1:06 ` Matthew Garrett
2009-04-03 1:16 ` david
2009-04-03 1:19 ` Matthew Garrett
2009-04-03 1:24 ` david
2009-04-03 1:36 ` Matthew Garrett
2009-04-03 3:08 ` david
2009-04-03 13:42 ` Matthew Garrett
2009-04-03 4:54 ` Theodore Tso
2009-04-03 11:09 ` Sitsofe Wheeler
2009-04-03 13:07 ` Alberto Gonzalez
2009-04-03 13:45 ` Matthew Garrett
2009-04-02 18:34 ` Nick Piggin
2009-04-02 18:38 ` Matthew Garrett
2009-04-02 18:56 ` Nick Piggin
2009-04-02 23:47 ` Matthew Garrett
2009-04-03 0:59 ` david
2009-04-03 1:09 ` Matthew Garrett
2009-04-03 1:17 ` david
2009-04-03 1:22 ` Matthew Garrett
2009-04-03 2:22 ` Ric Wheeler
2009-04-02 21:47 ` david
2009-04-06 21:32 ` supporting laptops fs-semantic changes (was Re: Ext4 and the "30 second window of death") Linda Walsh
2009-04-02 11:37 ` Ext4 and the "30 second window of death" Sitsofe Wheeler
2009-04-01 8:51 ` Andreas T.Auer
2009-04-03 7:13 ` Bojan Smojver
2009-04-05 4:07 ` Bojan Smojver
2009-04-05 4:51 ` Bojan Smojver
2009-04-05 5:41 ` Bojan Smojver
2009-04-05 17:27 ` Ed Tomlinson
-- strict thread matches above, loose matches on Subject: below --
2009-04-05 18:13 Tomasz Chmielewski
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