From owner-freebsd-stable@FreeBSD.ORG Sat May 6 19:54:36 2006 Return-Path: X-Original-To: stable@freebsd.org Delivered-To: freebsd-stable@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EA47216A400 for ; Sat, 6 May 2006 19:54:35 +0000 (UTC) (envelope-from rwatson@FreeBSD.org) Received: from cyrus.watson.org (cyrus.watson.org [209.31.154.42]) by mx1.FreeBSD.org (Postfix) with ESMTP id 49CD443D58 for ; Sat, 6 May 2006 19:54:35 +0000 (GMT) (envelope-from rwatson@FreeBSD.org) Received: from fledge.watson.org (fledge.watson.org [209.31.154.41]) by cyrus.watson.org (Postfix) with ESMTP id DE13346C38; Sat, 6 May 2006 15:54:34 -0400 (EDT) Date: Sat, 6 May 2006 20:54:34 +0100 (BST) From: Robert Watson X-X-Sender: robert@fledge.watson.org To: Chris In-Reply-To: <3aaaa3a0605061238ib77bb38x6f61eb6cc1c1c6c1@mail.gmail.com> Message-ID: <20060506204720.S46997@fledge.watson.org> References: <4457A02C.9040408@rogers.com> <35c231bf0605032011s65fbb1aby742438465ee98ee7@mail.gmail.com> <20060504033300.GA39935@xor.obsecurity.org> <44598615.3040400@rogers.com> <20060504044758.GA41047@xor.obsecurity.org> <44599732.1050905@rogers.com> <20060505080543.GD5466@garage.freebsd.pl> <35c231bf0605051049t2761281ar97b9634b8279b1fd@mail.gmail.com> <445B991F.3050600@rogers.com> <6.2.3.4.0.20060505145259.10d8dca0@64.7.153.2> <3aaaa3a0605061238ib77bb38x6f61eb6cc1c1c6c1@mail.gmail.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: Mike Jakubik , stable@freebsd.org Subject: Re: quota deadlock on 6.1-RC1 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 May 2006 19:54:36 -0000 On Sat, 6 May 2006, Chris wrote: > are snapshots a default setting? In case people want to avoid using snapshots, here are the uses I'm currently aware of in the base system: - Background file system check uses snapshots. This can be disabled by using background_fsck="NO" in /etc/rc.conf. - dump uses snapshots if the -L paramater is specified, in order to take an atomic backup of the system. It won't use snapshots unless explicitly specified. - mksnap_ffs uses snapshots, as it's the operator snapshot creation tool. FWIW, I and a moderate number of other people use snapshots daily on quite busy and over-burdened machines without problems. Also, as an FYI, several quota-related snapshot fixes went into CVS in the last 24-48 hours. Once they've settled for a few weeks, and assuming they don't have complex dependencies, they will get merged to RELENG_6. Presumably if there is sufficient demand, and they adequately address the reports of deadlocks with quotas+snapshots, they could be merged to RELENG_6_1 as an errata update. Robert N M Watson