From owner-freebsd-current@FreeBSD.ORG Tue Sep 30 16:07:29 2003 Return-Path: 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 58D4616A4B3 for ; Tue, 30 Sep 2003 16:07:29 -0700 (PDT) Received: from rs6000.univie.ac.at (male.univie.ac.at [131.130.1.14]) by mx1.FreeBSD.org (Postfix) with ESMTP id CEEA944003 for ; Tue, 30 Sep 2003 16:07:27 -0700 (PDT) (envelope-from l.ertl@univie.ac.at) Received: from wireless (adslle.cc.univie.ac.at [131.130.102.11]) by rs6000.univie.ac.at (8.12.2/8.12.2) with ESMTP id h8UN78iC011458; Wed, 1 Oct 2003 01:07:16 +0200 Date: Wed, 1 Oct 2003 01:04:51 +0200 (CEST) From: Lukas Ertl To: "Marc G. Fournier" In-Reply-To: <20030930194544.H94686@ganymede.hub.org> Message-ID: <20031001010119.M592@korben.in.tern> References: <20030930221148.54E7E5D07@ptavv.es.net> <20030930194544.H94686@ganymede.hub.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-current@freebsd.org Subject: Re: Improvements to fsck performance in -current ...? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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, 30 Sep 2003 23:07:29 -0000 On Tue, 30 Sep 2003, Marc G. Fournier wrote: > Now,I don't/wouldn't have softupdates enabled on / .. does the 'background > fsck' know to not background if softupdates are not enabled? Yes, this is no problem, if the FS doesn't have SU, it just checks it the "old" way. Since / is usually rather small, this is acceptable. > > I suspect that these enhancements may both require that soft updates be > > enabled for the file systems. > > are either of these enhancements back-patchable to the 4.x fsck, or do > they require some non-4.x compatible changes to work? It's not just the fsck application itself, background fsck basically needs file system snapshots, which are only available on UFS2, and I'm not sure if they can be backported to UFS1 at all. regards, le -- Lukas Ertl eMail: l.ertl@univie.ac.at UNIX Systemadministrator Tel.: (+43 1) 4277-14073 Vienna University Computer Center Fax.: (+43 1) 4277-9140 University of Vienna http://mailbox.univie.ac.at/~le/