From: Matthew Garrett <mjg@redhat.com>
To: Andreas Dilger <adilger@sun.com>
Cc: 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, matthew@wil.cx
Subject: Re: [PATCH v4] relatime: Make relatime smarter
Date: Fri, 28 Nov 2008 13:41:19 +0000 [thread overview]
Message-ID: <20081128134119.GA5058@srcf.ucam.org> (raw)
In-Reply-To: <20081127220839.GK3186@webber.adilger.int>
On Thu, Nov 27, 2008 at 03:08:39PM -0700, Andreas Dilger wrote:
> 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.
I don't see the real benefit to this. If you want to prevent atime
updates entirely, use noatime rather than relatime. Increasing the
timeout just means that you get increased disk activity every other day
rather than every day, which isn't really the problem we're trying to
solve.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2008-11-28 13:41 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
2008-11-28 11:13 ` Jamie Lokier
2008-11-28 13:41 ` Matthew Garrett [this message]
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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