From: Hans Reiser <reiser@namesys.com>
To: Andrew Morton <akpm@zip.com.au>
Cc: Joshua Schmidlkofer <menion@srci.iwpsd.org>,
kernel <linux-kernel@vger.kernel.org>,
Chris Mason <mason@suse.com>,
"Gryaznova E." <grev@namesys.botik.ru>,
"Vladimir V. Saveliev" <monstr@namesys.com>
Subject: Re: ReiserFS / 2.4.6 / Data Corruption
Date: Fri, 27 Jul 2001 21:45:07 +0400 [thread overview]
Message-ID: <3B61A8A3.72EC132F@namesys.com> (raw)
In-Reply-To: <Pine.LNX.4.33.0107271515200.10139-100000@devel.blackstar.nl>, <Pine.LNX.4.33.0107271515200.10139-100000@devel.blackstar.nl> <0107270818120A.06707@widmers.oce.srci.oce.int> <3B619956.6AA072F9@zip.com.au> <3B619D63.9989F9F@namesys.com> <3B61A4A5.41E7B891@zip.com.au>
Andrew Morton wrote:
>
> Hans Reiser wrote:
> >
> > Andrew, can you do this such that there is no disruption of our
> > disk format, and make a mount option
> > out of it, and probably we should use this patch....
>
> I'll defer to Chris :)
Yes, I'll let him think carefully through the details of how it affects ordering of the writes.
>
> There's no disruption to disk format - it just simulates
> the user typing `sync' at the right time. I think the
> concept is sound, and I'm sure Chris can find a more efficient
> way...
Oops, sorry, you changed the in-ram not the on-disk sb....
>
> > After you make a mount option out of it, grev will benchmark
> > it for us using the usual suite of benchmarks.
> >
>
> Ordered-data is a funny thing. Under heavy loads it tends
> to make a significant throughput difference - on ext3 it
> almost halves throughput wrt writeback mode.
>
> But this by no means indicates that writes are half as slow;
> what happens is that metadata-intensive workloads fill the
> journal up quickly, so the `sync' happens more frequently.
> Under normal workloads, or less metadata-intense workloads
> the difference is very small.
>
> During testing of that little patch I noted that the
> disk went crunch every thirty seconds or so, which is good.
> Presumably the reiserfs journal is larger, or more space-efficient.
>
> -
Thanks Andrew
next prev parent reply other threads:[~2001-07-27 17:47 UTC|newest]
Thread overview: 140+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-18 4:14 ReiserFS / 2.4.6 / Data Corruption Sam Thompson
2001-07-18 5:18 ` Steve Kieu
2001-07-18 16:22 ` Erik Mouw
2001-07-19 2:02 ` Steve Kieu
2001-07-19 13:28 ` Hans Reiser
2001-07-19 15:50 ` Erik Mouw
2001-07-27 12:52 ` bvermeul
2001-07-27 12:55 ` Hans Reiser
2001-07-27 13:24 ` bvermeul
2001-07-27 14:18 ` Joshua Schmidlkofer
2001-07-27 14:55 ` Hans Reiser
2001-07-27 15:02 ` Chris Wedgwood
2001-07-27 16:06 ` Henning P. Schmiedehausen
2001-07-27 22:02 ` Luigi Genoni
2001-07-28 13:45 ` Matthew Gardiner
2001-07-28 16:15 ` Hans Reiser
2001-07-28 16:45 ` Marcus Meissner
2001-07-28 16:45 ` Christoph Hellwig
2001-07-29 10:19 ` Matthew Gardiner
2001-07-29 11:04 ` Chris Wedgwood
2001-07-30 10:08 ` Hans Reiser
2001-07-30 19:06 ` Christoph Hellwig
2001-07-30 20:30 ` Hans Reiser
2001-07-30 20:49 ` Christoph Hellwig
2001-07-30 21:05 ` Hans Reiser
2001-07-30 21:29 ` Christoph Hellwig
2001-07-30 21:44 ` Hans Reiser
2001-07-30 21:48 ` Hans Reiser
2001-07-30 21:57 ` Chris Wedgwood
2001-07-30 21:58 ` Christoph Hellwig
2001-07-31 7:45 ` Henning P. Schmiedehausen
2001-07-31 9:55 ` Hans Reiser
2001-07-31 10:24 ` Arjan van de Ven
2001-07-31 10:24 ` Anders Eriksson
2001-07-31 10:32 ` Chris Wedgwood
2001-07-31 17:01 ` [OT] " J Sloan
2001-07-30 21:59 ` Rik van Riel
2001-07-30 22:34 ` Hans Reiser
2001-07-31 11:34 ` David Weinehall
2001-07-31 12:22 ` ReiserFS / 2.4.6 / Data Corruption (patch to cause redhat to unmount reiserfs on halt included) Hans Reiser
2001-07-31 12:37 ` Christoph Hellwig
2001-07-31 13:12 ` Hans Reiser
2001-07-30 22:41 ` ReiserFS / 2.4.6 / Data Corruption Kip Macy
2001-07-30 22:50 ` Christoph Hellwig
2001-07-30 21:13 ` Hans Reiser
2001-07-30 21:21 ` Hans Reiser
2001-07-30 21:49 ` Christoph Hellwig
2001-07-31 2:34 ` Andrew Morton
2001-07-30 22:04 ` Rik van Riel
2001-07-30 22:36 ` Hans Reiser
2001-07-30 22:53 ` Rik van Riel
2001-07-30 23:12 ` Hans Reiser
2001-07-31 10:32 ` Chris Wedgwood
2001-07-31 10:59 ` Hans Reiser
2001-07-31 11:42 ` Chris Wedgwood
2001-07-31 13:41 ` Chris Mason
2001-07-31 15:15 ` Chris Wedgwood
2001-07-31 15:58 ` Chris Mason
2001-07-31 15:22 ` Hans Reiser
2001-07-31 15:49 ` Chris Mason
2001-07-31 22:08 ` Jussi Laako
2001-07-31 22:32 ` Dan Hollis
2001-07-31 23:45 ` Chris Wedgwood
2001-08-05 22:19 ` CRC loop method (was Re: ReiserFS / 2.4.6 / Data Corruption) Pavel Machek
2001-08-01 16:23 ` ReiserFS / 2.4.6 / Data Corruption Andreas Dilger
2001-08-02 13:44 ` Pavel Machek
2001-07-27 15:06 ` Daniel Phillips
2001-07-27 15:33 ` Hans Reiser
2001-07-27 16:30 ` Daniel Phillips
2001-07-27 16:49 ` Early Flush Hans Reiser
2001-07-27 15:07 ` ReiserFS / 2.4.6 / Data Corruption Chris Wedgwood
2001-07-27 16:39 ` Andrew Morton
2001-07-27 16:57 ` Hans Reiser
2001-07-27 17:28 ` Andrew Morton
2001-07-27 17:45 ` Hans Reiser [this message]
2001-07-27 17:10 ` Steve Lord
2001-07-27 14:48 ` Hans Reiser
2001-07-27 15:04 ` bvermeul
2001-07-27 15:38 ` Hans Reiser
2001-07-27 17:29 ` Eric W. Biederman
2001-07-27 18:47 ` bvermeul
2001-07-27 19:22 ` Hans Reiser
2001-07-28 6:19 ` bvermeul
2001-07-28 7:39 ` Hans Reiser
2001-07-27 19:30 ` Jussi Laako
2001-07-28 6:21 ` bvermeul
2001-07-27 21:49 ` Daniel Phillips
2001-07-27 20:49 ` Lehmann
2001-07-28 14:13 ` Matthew Gardiner
2001-07-28 14:40 ` bvermeul
2001-07-18 9:42 ` Hans Reiser
[not found] ` <3B5579E7.5090107@namesys.com>
2001-07-18 16:26 ` Sam Thompson
2001-07-18 16:34 ` Hans Reiser
2001-07-18 13:09 ` Andre Pang
[not found] <no.id>
2001-07-27 13:27 ` Alan Cox
2001-07-27 13:38 ` bvermeul
2001-07-27 13:39 ` Alan Cox
2001-07-27 13:47 ` bvermeul
2001-07-27 13:49 ` Alan Cox
2001-07-28 14:16 ` Matthew Gardiner
2001-08-08 18:42 ` Stephen C. Tweedie
2001-07-27 14:16 ` Philip R. Auld
2001-07-27 14:38 ` Jordan
2001-07-27 14:51 ` Hans Reiser
2001-07-27 15:12 ` Philip R. Auld
2001-07-27 14:23 ` Hans Reiser
2001-07-27 14:21 ` Alan Cox
2001-07-28 14:18 ` Matthew Gardiner
2001-07-28 16:25 ` Alan Cox
2001-07-29 10:15 ` Matthew Gardiner
2001-07-29 11:10 ` Chris Wedgwood
2001-07-29 14:28 ` Luigi Genoni
2001-07-29 11:16 ` Christoph Hellwig
2001-07-27 15:06 ` Alan Cox
2001-07-27 15:26 ` Joshua Schmidlkofer
2001-07-27 15:46 ` Hans Reiser
2001-07-27 17:46 ` Christoph Rohland
2001-07-27 18:02 ` Hans Reiser
2001-07-27 18:10 ` Dustin Byford
2001-07-27 19:20 ` Hans Reiser
2001-07-28 16:10 ` Henning P. Schmiedehausen
2001-07-27 15:31 ` Hans Reiser
2001-07-27 16:25 ` Kip Macy
2001-07-27 17:29 ` Ville Herva
2001-07-27 17:40 ` Alan Cox
2001-07-27 17:43 ` Ville Herva
2001-07-27 20:46 ` Lehmann
2001-07-27 21:13 ` Hans Reiser
2001-07-27 15:51 ` Alan Cox
2001-07-27 16:41 ` Hans Reiser
2001-07-27 16:55 ` Alan Cox
2001-07-27 21:24 ` Alan Cox
2001-07-27 21:47 ` Hans Reiser
2001-07-27 22:10 ` Alan Cox
2001-07-28 7:36 ` Hans Reiser
2001-07-28 14:08 ` Chris Mason
2001-07-27 15:13 Cress, Andrew R
2001-07-30 15:24 Chris Mason
2001-07-30 15:47 ` Andrew Morton
2001-07-30 16:04 ` Chris Mason
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