From: Andrew Morton <akpm@zip.com.au>
To: Tony.Lill@ajlc.waterloo.on.ca
Cc: linux-kernel@vger.kernel.org
Subject: Re: laptops and journalling filesystems
Date: Tue, 31 Jul 2001 13:30:10 +1000 [thread overview]
Message-ID: <3B662642.4AB6E800@zip.com.au> (raw)
In-Reply-To: <200107310254.WAA22236@spider.ajlc.waterloo.on.ca>
Tony Lill wrote:
>
> Do any of the current batch of journalling filesystems NOT diddle the
> disk every 5 seconds? I've tried reiser and ext3 and they're both
> antithetic to spinning down the disk. Any plans to fix this bug in
> future kernels?
If you mount everything with `noatime' there's nothing to
be written unless you're writing stuff.
Unfortunately ext3 defeats the trick of setting the kupdate
interval to something huge. On my list of things-to-do.
Probably it's as simple as setting the commit timer to
a large interval (grep for "HZ" in fs/jbd/journal.c).
Commits are driven by either a timer expiry or by the
journal getting too full. If the interval is set large
then probably journal-full will be the main reason for
running a commit.
Of course, if the interval is set to 15 minutes and
you crash, you'll lose up to 15 minutes' work.
-
next prev parent reply other threads:[~2001-07-31 3:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-31 2:54 laptops and journalling filesystems Tony Lill
2001-07-31 3:30 ` Andrew Morton [this message]
2001-07-31 3:52 ` Rik van Riel
2001-07-31 6:13 ` Andrew Morton
2001-07-31 5:28 ` Justin Guyett
2001-07-31 15:51 ` dean gaudet
2001-07-31 6:27 ` David Ford
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