Date: Tue, 23 May 2006 16:30:13 +0200 From: mlfbsd <mlfbsd@cognet.ci0.org> To: Giorgos Keramidas <keramida@ceid.upatras.gr> Cc: current@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: md /tmp and async mounts Message-ID: <20060523143013.GA11472@ci0.org> In-Reply-To: <20060523133037.GA2908@gothmog.pc> References: <20060522211223.GA3621@xor.obsecurity.org> <20060522231437.GC1446@odin.ac.hmc.edu> <20060523133037.GA2908@gothmog.pc>
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On Tue, May 23, 2006 at 04:30:37PM +0300, Giorgos Keramidas wrote: > On 2006-05-22 16:14, Brooks Davis <brooks@one-eyed-alien.net> wrote: > >On Mon, May 22, 2006 at 05:12:24PM -0400, Kris Kennaway wrote: > >> I noticed that with tmpmfs in rc.conf, the md is not being mounted > >> with -o async; this is an enormous performance boost, so is there a > >> reason it is not used, or just that it was overlooked? > > > > Just overlooked as far as I know. We correctly switched to not mounting > > with softupdates, but should probably switch to -o async. > > Right. The only reasons why the current tmpmfs_flags doesn't > include the `-o async' option too are: > > a) It didn't back when it was all hardcoded in the script > > b) I didn't think about adding it by default when revision > 1.230 of src/etc/defaults/rc.conf was committed by me > > If it does improve things, we should probably make the change :) > The sys/dev/md/md.c rev 1.115 commit log says async used to be the default, but was switched off because it was causing deadlocks. Did this get fixed since ? Cheers, Olivier
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