From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: david@lang.hm, 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: Fri, 3 Apr 2009 05:56:40 +1100 [thread overview]
Message-ID: <200904030556.41270.nickpiggin@yahoo.com.au> (raw)
In-Reply-To: <20090402183834.GB4773@srcf.ucam.org>
On Friday 03 April 2009 05:38:34 Matthew Garrett wrote:
> On Fri, Apr 03, 2009 at 05:34:59AM +1100, Nick Piggin wrote:
>
> > Shouldn't applications have a mode to avoid spinning up the disk if it is
> > so important?
>
> They do. It's called "Don't use fsync() unless your data needs to be on
> disk". I'm not sure why you'd ever want an application to be in anything
> but this mode.
>
Well you might decide you are willing to sacrifice timely storage of
logs, or reducing backups in your editor or something. But obviously
the kernel can't decide which of those fsyncs is safe to omit (or
turn into a barrier) while staying within the advertised semantics of
the app. Application obviously can.
next prev parent reply other threads:[~2009-04-02 18:57 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-29 10:24 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
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 [this message]
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
2009-04-05 18:13 Tomasz Chmielewski
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