Date: Sun, 13 Apr 2003 00:02:09 +0100 From: Tony Finch <dot@dotat.at> To: zec@tel.fer.hr Cc: freebsd-stable@freebsd.org Subject: Re: PATCH: Forcible delaying of UFS (soft)updates Message-ID: <E194U0f-0004Pn-00@chiark.greenend.org.uk> In-Reply-To: <3E976EBD.C3E66EF8@tel.fer.hr>
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Marko Zec <zec@tel.fer.hr> wrote: > >Here's a patch against 4.8-RELEASE kernel that allows disk writes on >softupdates-enabled filesystems to be delayed for (theoretically) >arbitrarily long periods of time. The motivation for such updating >policy is surprisingly not purely suicidal - it can allow disks on >laptops to spin down immediately after I/O operations and stay idle for >longer periods of time, thus saving considerable amount of battery >power. I've used a much simpler patch for a number of years, which allows you to increase the 30s syncer interval. See http://dotat.at/prog/buildworld/patches.src/04.syncdelay.patch.disabled Tony. -- f.a.n.finch <dot@dotat.at> http://dotat.at/ LANDS END TO ST DAVIDS HEAD INCLUDING THE BRISTOL CHANNEL: EAST OR SOUTHEAST 4, INCREASING 7, LOCALLY GALE 8, EASING SOUTHEAST 4 OR 5 LATER. FAIR, THEN RAIN, WITH RISK OF MIST. GOOD, BECOMING MODERATE OR POOR. SLIGHT OR MODERATE, LOCALLY ROUGH LATER.
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