From owner-freebsd-current@FreeBSD.ORG Tue May 23 13:59:07 2006 Return-Path: X-Original-To: current@freebsd.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5F7D616A4F4 for ; Tue, 23 May 2006 13:59:07 +0000 (UTC) (envelope-from mlfbsd@dong.ci0.org) Received: from dong.ci0.org (cognet.ci0.org [80.65.224.102]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8F92143D45 for ; Tue, 23 May 2006 13:59:06 +0000 (GMT) (envelope-from mlfbsd@dong.ci0.org) Received: from dong.ci0.org (localhost.ci0.org [127.0.0.1]) by dong.ci0.org (8.13.6/8.13.4) with ESMTP id k4NEUEbQ011506; Tue, 23 May 2006 16:30:14 +0200 (CEST) (envelope-from mlfbsd@dong.ci0.org) Received: (from mlfbsd@localhost) by dong.ci0.org (8.13.6/8.13.4/Submit) id k4NEUDFq011505; Tue, 23 May 2006 16:30:13 +0200 (CEST) (envelope-from mlfbsd) Date: Tue, 23 May 2006 16:30:13 +0200 From: mlfbsd To: Giorgos Keramidas Message-ID: <20060523143013.GA11472@ci0.org> References: <20060522211223.GA3621@xor.obsecurity.org> <20060522231437.GC1446@odin.ac.hmc.edu> <20060523133037.GA2908@gothmog.pc> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060523133037.GA2908@gothmog.pc> User-Agent: Mutt/1.4.1i Cc: current@freebsd.org, Kris Kennaway Subject: Re: md /tmp and async mounts X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 May 2006 13:59:07 -0000 On Tue, May 23, 2006 at 04:30:37PM +0300, Giorgos Keramidas wrote: > On 2006-05-22 16:14, Brooks Davis 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