From: Matthew Wilcox <matthew@wil.cx>
To: Andreas Dilger <adilger@sun.com>
Cc: Matthew Garrett <mjg@redhat.com>,
Christoph Hellwig <hch@infradead.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Randy Dunlap <randy.dunlap@oracle.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
mingo@redhat.com, val.henson@gmail.com
Subject: Re: [PATCH v4] relatime: Make relatime smarter
Date: Thu, 27 Nov 2008 15:35:14 -0700 [thread overview]
Message-ID: <20081127223514.GP25548@parisc-linux.org> (raw)
In-Reply-To: <20081127220839.GK3186@webber.adilger.int>
On Thu, Nov 27, 2008 at 03:08:39PM -0700, Andreas Dilger wrote:
> On Nov 27, 2008 17:58 +0000, Matthew Garrett wrote:
> > + relatime_interval=
> > + [FS] relative atime update frequency, in seconds.
> > + (default: 1 day: 86400 seconds)
>
> The one problem with a 1-day default is that cron jobs like updatedb will
> revert to updating the atime on every single file every day. It would be
> better to make it slightly more than 1 day (e.g. 25h) to avoid this and
> at least defer atime updates to every other day for files that are not
> otherwise accessed except by cron.
Doesn't updatedb only access directories, not files? I don't think
relatime implies nodiratime, but certainly the two could both be
specified, and that would fix one of the updatedb problems. Are there
any other common cronjobs you're concerned about?
--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
next prev parent reply other threads:[~2008-11-27 22:35 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-26 19:54 [PATCH 1/2] relatime: Make atime updates more useful Matthew Garrett
2008-11-26 19:58 ` [PATCH 2/2] relatime: Allow making relatime the default behaviour Matthew Garrett
2008-11-26 21:11 ` Matthew Wilcox
2008-11-26 22:39 ` Randy Dunlap
2008-11-27 15:01 ` [PATCH v2 1/2] relatime: Make relatime behaviour smarter Matthew Garrett
2008-11-27 15:03 ` [PATCH v2 2/2] relatime: Allow making relatime the default behaviour Matthew Garrett
2008-11-27 15:07 ` Ingo Molnar
2008-11-27 16:03 ` Karel Zak
[not found] ` <20081127160353.GQ2961-sHeGUpI7y9L/9pzu0YdTqQ@public.gmane.org>
2008-11-27 17:30 ` Pádraig Brady
[not found] ` <492ED945.5010600-V8g9lnOeT5ydJdNcDFJN0w@public.gmane.org>
2008-11-27 17:39 ` Matthew Garrett
2008-11-27 16:35 ` Alan Cox
2008-11-27 16:47 ` Matthew Garrett
2008-11-27 16:59 ` [PATCH v3] relatime: Make relatime smarter Matthew Garrett
2008-11-27 17:06 ` Christoph Hellwig
2008-11-27 17:58 ` [PATCH v4] " Matthew Garrett
2008-11-27 22:08 ` Andreas Dilger
2008-11-27 22:35 ` Matthew Wilcox [this message]
2008-11-28 11:13 ` Jamie Lokier
2008-11-28 13:41 ` Matthew Garrett
2008-11-28 11:18 ` Jamie Lokier
2008-11-28 13:40 ` Matthew Wilcox
2008-11-28 13:47 ` Matthew Garrett
2008-12-02 11:10 ` Karel Zak
2008-12-02 16:46 ` Matthew Wilcox
2008-11-27 19:15 ` [PATCH v3] " Alan Cox
2008-11-28 11:16 ` Jamie Lokier
2008-11-28 13:45 ` Matthew Garrett
2008-11-27 17:03 ` [PATCH v2 2/2] relatime: Allow making relatime the default behaviour Christoph Hellwig
2008-11-29 8:24 ` Andrew Morton
2008-11-29 13:03 ` Matthew Wilcox
2008-11-29 13:57 ` Jörn Engel
2008-11-29 18:56 ` Jamie Lokier
2008-11-29 19:02 ` Matthew Garrett
2008-11-29 20:32 ` Andrew Morton
2008-11-29 20:38 ` Matthew Wilcox
2008-11-29 20:56 ` Andrew Morton
2008-11-29 21:41 ` Ingo Molnar
2008-11-29 20:55 ` Arjan van de Ven
2008-11-29 21:03 ` Matthew Garrett
2008-11-29 21:02 ` Matthew Garrett
2008-11-27 15:06 ` [PATCH v2 1/2] relatime: Make relatime behaviour smarter Ingo Molnar
2008-11-29 8:29 ` [PATCH 1/2] relatime: Make atime updates more useful Andrew Morton
2008-12-02 17:19 ` [PATCH] relatime: Let relatime update atime at least once per day Matthew Garrett
2008-12-13 5:26 ` Valerie Aurora Henson
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