From: Linus Torvalds <torvalds@osdl.org>
To: Bill Davidsen <davidsen@tmr.com>
Cc: Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@osdl.org>,
Magnus Damm <magnus.damm@gmail.com>,
mason@suse.com, mike.taht@timesys.com, mpm@selenic.com,
linux-kernel@vger.kernel.org, git@vger.kernel.org
Subject: Re: Mercurial 0.3 vs git benchmarks
Date: Wed, 27 Apr 2005 14:39:03 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.58.0504271431510.18901@ppc970.osdl.org> (raw)
In-Reply-To: <426FFFAB.1030005@tmr.com>
On Wed, 27 Apr 2005, Bill Davidsen wrote:
>
> I said much the same in another post, but noatime is not always what I
> really want.
"atime" is really nasty for a filesystem. I don't know if anybody noticed,
but git already uses O_NOATIME to open all the object files, because if
you don't do that, then just looking at a full kernel tree (which has more
than a thousand subdirectories) will cause nasty IO patterns from just
writing back "atime" information for the "tree" objects we looked up.
So you can do (and git does) selective atime updates. It just requires a
small amount of extra care.
> How about a "nojournalatime" option, so the atime would be
> updated at open and close, but not journaled at any other time.
Probably a good idea.
Linus
next prev parent reply other threads:[~2005-04-27 21:37 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-26 0:41 Mercurial 0.3 vs git benchmarks Matt Mackall
2005-04-26 1:49 ` Daniel Phillips
2005-04-26 2:08 ` Linus Torvalds
2005-04-26 2:30 ` Mike Taht
2005-04-26 3:04 ` Linus Torvalds
2005-04-26 4:00 ` Linus Torvalds
2005-04-26 11:13 ` Chris Mason
2005-04-26 15:09 ` Magnus Damm
2005-04-26 15:38 ` Chris Mason
2005-04-26 16:23 ` Magnus Damm
2005-04-26 18:18 ` Chris Mason
2005-04-26 20:56 ` Andrew Morton
2005-04-26 21:07 ` Linus Torvalds
2005-04-26 22:50 ` H. Peter Anvin
2005-04-26 22:56 ` Andrew Morton
2005-04-26 23:43 ` H. Peter Anvin
2005-04-27 15:01 ` Florian Weimer
2005-04-27 15:13 ` Thomas Glanzmann
2005-04-27 18:54 ` H. Peter Anvin
2005-04-27 19:01 ` Thomas Glanzmann
2005-04-27 19:57 ` Theodore Ts'o
2005-04-27 20:06 ` Thomas Glanzmann
2005-04-27 20:35 ` H. Peter Anvin
2005-04-27 20:39 ` Thomas Glanzmann
2005-04-27 20:47 ` Florian Weimer
2005-04-27 20:55 ` Florian Weimer
2005-04-27 21:04 ` H. Peter Anvin
2005-04-27 21:06 ` Florian Weimer
2005-04-27 21:32 ` Theodore Ts'o
2005-04-27 19:55 ` Theodore Ts'o
2005-04-27 6:34 ` Ingo Molnar
2005-04-27 21:10 ` Bill Davidsen
2005-04-27 21:39 ` Linus Torvalds [this message]
2005-04-26 16:42 ` Linus Torvalds
2005-04-26 17:39 ` Chris Mason
2005-04-26 19:52 ` Chris Mason
2005-04-26 18:15 ` H. Peter Anvin
2005-04-26 20:30 ` Bill Davidsen
2005-04-26 16:11 ` Bill Davidsen
2005-04-26 4:01 ` Matt Mackall
2005-04-26 4:20 ` Linus Torvalds
2005-04-26 4:09 ` Chris Wedgwood
2005-04-26 4:22 ` Andreas Gal
2005-04-26 4:22 ` Linus Torvalds
2005-04-29 6:01 ` Mercurial 0.4b vs git patchbomb benchmark Matt Mackall
2005-04-29 6:40 ` Sean
2005-04-29 7:40 ` Matt Mackall
2005-04-29 8:40 ` Sean
2005-04-29 14:34 ` Linus Torvalds
2005-04-29 15:18 ` Morten Welinder
2005-04-29 16:52 ` Matt Mackall
2005-05-02 16:10 ` Bill Davidsen
2005-05-02 19:02 ` Sean
2005-05-02 22:02 ` Linus Torvalds
2005-05-02 22:30 ` Matt Mackall
2005-05-02 22:49 ` Linus Torvalds
2005-05-03 0:00 ` Matt Mackall
2005-05-03 2:48 ` Linus Torvalds
2005-05-03 3:29 ` Matt Mackall
2005-05-03 4:18 ` Linus Torvalds
2005-05-03 4:24 ` Linus Torvalds
2005-05-03 4:27 ` Matt Mackall
2005-05-03 8:45 ` Chris Wedgwood
2005-04-29 15:44 ` Tom Lord
2005-04-29 15:58 ` Linus Torvalds
2005-04-29 17:34 ` Tom Lord
2005-04-29 17:56 ` Linus Torvalds
2005-04-29 18:08 ` Tom Lord
2005-04-29 18:33 ` Sean
2005-04-29 18:54 ` Tom Lord
2005-04-29 19:13 ` Sean
2005-05-02 16:15 ` Bill Davidsen
2005-04-29 16:37 ` Matt Mackall
2005-04-29 17:09 ` Linus Torvalds
2005-04-29 19:12 ` Matt Mackall
2005-04-29 19:50 ` Linus Torvalds
2005-04-29 20:23 ` Matt Mackall
2005-04-29 20:49 ` Linus Torvalds
2005-04-29 21:20 ` Matt Mackall
2005-04-29 16:46 ` Bill Davidsen
2005-04-29 20:19 ` Andrea Arcangeli
2005-04-29 22:30 ` Olivier Galibert
2005-04-29 22:47 ` Andrea Arcangeli
2005-04-29 20:30 ` Andrea Arcangeli
2005-04-29 20:39 ` Matt Mackall
2005-04-30 2:52 ` Andrea Arcangeli
2005-04-30 15:20 ` Matt Mackall
2005-04-30 16:37 ` Andrea Arcangeli
2005-05-02 15:49 ` Bill Davidsen
2005-05-02 16:14 ` Valdis.Kletnieks
2005-05-03 17:40 ` Bill Davidsen
2005-05-04 2:10 ` Mercurial 0.4b vs git patchbomb benchmark (/usr/bin/env again) David A. Wheeler
2005-05-02 16:17 ` Mercurial 0.4b vs git patchbomb benchmark Andrea Arcangeli
2005-05-02 16:31 ` Linus Torvalds
2005-05-02 17:18 ` Daniel Jacobowitz
2005-05-02 17:32 ` Linus Torvalds
2005-05-02 20:54 ` Sam Ravnborg
2005-05-02 17:20 ` Ryan Anderson
2005-05-02 17:31 ` Linus Torvalds
2005-05-02 21:17 ` Kyle Moffett
2005-05-03 17:43 ` Bill Davidsen
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