From: Theodore Tso <tytso@mit.edu>
To: Pavel Machek <pavel@suse.cz>
Cc: "Alexander E. Patrakov" <patrakov@gmail.com>,
kernel list <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>,
mtk.manpages@gmail.com, rdunlap@xenotime.net,
linux-doc@vger.kernel.org, Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: document ext3 requirements
Date: Sun, 4 Jan 2009 18:58:27 -0500 [thread overview]
Message-ID: <20090104235827.GH22958@mit.edu> (raw)
In-Reply-To: <20090104223756.GD1913@elf.ucw.cz>
On Sun, Jan 04, 2009 at 11:37:56PM +0100, Pavel Machek wrote:
>
> Are you sure you need to have thrashing? AFAICT metadata + fsync heavy
> workload should be enough... and there were scripts to easily repeat
> that.
The memory pressure is needed to force disk buffers out to disk sooner
than fsync() would normally force buffers out. The scripts which I've
seen induced memory pressure. If the disk is *super* aggressive at
reordering writes, I suppose a heavy fsync workload might be enough on
its own, but in practice, it's generally not enough.
- Ted
next prev parent reply other threads:[~2009-01-04 23:58 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-03 12:38 document ext3 requirements Pavel Machek
2009-01-03 21:17 ` Martin MOKREJŠ
2009-01-03 22:06 ` Pavel Machek
2009-01-03 22:17 ` Duane Griffin
2009-01-03 22:29 ` Pavel Machek
2009-01-03 23:01 ` Martin MOKREJŠ
2009-01-03 23:38 ` Duane Griffin
2009-01-03 23:50 ` Martin MOKREJŠ
2009-01-03 23:58 ` Robert Hancock
2009-01-04 0:08 ` Martin MOKREJŠ
2009-01-04 21:49 ` Ingo Oeser
2009-01-04 0:00 ` Duane Griffin
2009-01-04 0:11 ` Martin MOKREJŠ
2009-01-04 0:41 ` Duane Griffin
2009-01-04 3:52 ` Valdis.Kletnieks
2009-01-04 14:24 ` Duane Griffin
2009-01-04 18:40 ` Theodore Tso
2009-01-04 19:21 ` Geert Uytterhoeven
2009-01-04 19:36 ` Theodore Tso
2009-01-04 19:51 ` Duane Griffin
2009-01-04 21:55 ` Theodore Tso
2009-01-04 22:06 ` Duane Griffin
2009-01-04 22:42 ` Bron Gondwana
2009-01-05 3:22 ` Rob Landley
2009-01-04 0:19 ` Pavel Machek
2009-01-05 2:55 ` Rob Landley
2009-01-04 19:56 ` Rob Landley
2009-01-05 19:16 ` Theodore Tso
2009-01-06 19:20 ` Rob Landley
2009-01-06 10:08 ` Matthias Andree
2009-01-06 15:23 ` Theodore Tso
2009-01-03 23:12 ` Duane Griffin
2009-01-06 10:06 ` Matthias Andree
2009-01-04 2:32 ` Theodore Tso
2009-01-04 22:33 ` Pavel Machek
2009-01-04 22:34 ` [patch] document ext3 a bit better Pavel Machek
2009-01-05 14:57 ` Theodore Tso
2009-01-06 9:21 ` Pavel Machek
2009-01-09 23:24 ` Jiri Kosina
2009-01-09 23:36 ` Randy Dunlap
2009-01-09 23:47 ` Jiri Kosina
2009-01-04 13:35 ` document ext3 requirements Alexander E. Patrakov
2009-01-04 13:53 ` Valdis.Kletnieks
2009-01-04 18:21 ` Michael Tokarev
2009-01-04 18:38 ` Theodore Tso
2009-01-04 22:37 ` Pavel Machek
2009-01-04 23:58 ` Theodore Tso [this message]
2009-01-05 11:43 ` Alan Cox
2009-01-07 11:59 ` Rob Landley
2009-01-04 20:10 ` Pavel Machek
2009-01-04 19:49 ` Rob Landley
2009-01-04 22:06 ` Theodore Tso
2009-01-04 22:25 ` Pavel Machek
2009-01-04 23:00 ` [patch] " Pavel Machek
2009-01-05 2:42 ` Rob Landley
2009-01-05 9:54 ` Pavel Machek
2009-01-04 23:07 ` Pavel Machek
2009-01-05 1:38 ` Rob Landley
2009-01-04 22:55 ` Pavel Machek
2009-01-05 0:16 ` david
2009-01-05 9:38 ` Pavel Machek
2009-01-05 1:50 ` Rob Landley
2009-01-05 3:20 ` Martin K. Petersen
2009-01-05 9:45 ` Pavel Machek
2009-01-05 11:28 ` Alan Cox
2009-01-05 19:15 ` Martin K. Petersen
2009-01-05 20:19 ` Theodore Tso
[not found] <fa.pmCH9X+XujDl6RH6/TpkNtsTnbk@ifi.uio.no>
[not found] ` <fa.b62zZFe5e154PhgA+0sdwVXD9F0@ifi.uio.no>
[not found] ` <fa.ZTpiSvxEhp3YJDepiUQs+cU0C98@ifi.uio.no>
[not found] ` <fa.xvvufQC6zTpU9R6vhDl51DR5V7A@ifi.uio.no>
[not found] ` <fa.pkV69eXC76Pb9fnmERdAwXX9OKA@ifi.uio.no>
[not found] ` <fa.hQTLXdIllf+hs4yQb092u6fowq0@ifi.uio.no>
2009-01-04 19:08 ` Sitsofe Wheeler
2009-01-04 19:31 ` Theodore Tso
2009-01-04 22:40 ` Pavel Machek
2009-01-04 23:30 ` Theodore Tso
2009-01-05 3:49 ` Rob Landley
2009-01-05 4:31 ` Robert Hancock
2009-01-05 5:00 ` david
2009-01-05 11:19 ` Alan Cox
2009-01-05 19:00 ` Rob Landley
2009-01-05 19:27 ` Martin K. Petersen
2009-01-06 10:41 ` Matthias Andree
2009-01-06 15:30 ` Theodore Tso
[not found] ` <20090106153020.GB13086__11022.1833143898$1231255950$gmane$org@mit.edu>
2009-01-06 15:40 ` Andi Kleen
2009-01-06 15:57 ` Theodore Tso
2009-01-06 17:31 ` Andi Kleen
2009-01-06 19:31 ` Rob Landley
2009-01-27 13:24 ` Thierry Vignaud
2009-01-27 13:37 ` Alan Cox
2009-01-06 10:36 ` Matthias Andree
[not found] <fa.P4z5CJpM0xT37PWJuOuCHDkO76o@ifi.uio.no>
[not found] ` <fa.eOwOqydZi0qs6K1nmNxBFGQMV40@ifi.uio.no>
[not found] ` <fa.26o5IHCAC3TQdXupl62CLYwQ+Wk@ifi.uio.no>
2009-01-04 23:13 ` Sitsofe Wheeler
2009-01-05 2:51 ` Rob Landley
2009-01-05 3:33 ` Martin K. Petersen
2009-01-05 4:02 ` david
2009-01-05 3:52 ` Rob Landley
[not found] ` <fa.GBkQuKdRj+YRVczlNLFhGvaw3WY@ifi.uio.no>
[not found] ` <fa.rCyCghh/+staAmYi/+gwYvefIS0@ifi.uio.no>
[not found] ` <fa.c5j7jAMUnJPvgI9Oj/VczSDNakE@ifi.uio.no>
[not found] ` <fa.377DMq2lPMyaHxadPnApFSJFoCg@ifi.uio.no>
2009-01-05 20:36 ` Sitsofe Wheeler
2009-01-05 23:09 ` Theodore Tso
[not found] ` <fa.ucJLoSQwk9OAj6T6x60tbWaiTAo@ifi.uio.no>
2009-01-05 22:25 ` Sitsofe Wheeler
2009-01-06 4:08 ` Rob Landley
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