From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265594AbUBBOel (ORCPT ); Mon, 2 Feb 2004 09:34:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265610AbUBBOel (ORCPT ); Mon, 2 Feb 2004 09:34:41 -0500 Received: from nevyn.them.org ([66.93.172.17]:22668 "EHLO nevyn.them.org") by vger.kernel.org with ESMTP id S265594AbUBBOek (ORCPT ); Mon, 2 Feb 2004 09:34:40 -0500 Date: Mon, 2 Feb 2004 09:34:39 -0500 From: Daniel Jacobowitz To: Neil Brown Cc: linux-kernel@vger.kernel.org Subject: Re: RAID arrays not reconstructing in 2.6 Message-ID: <20040202143439.GA22241@nevyn.them.org> Mail-Followup-To: Neil Brown , linux-kernel@vger.kernel.org References: <20040201171525.GA2092@nevyn.them.org> <16413.54841.104599.928032@notabene.cse.unsw.edu.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <16413.54841.104599.928032@notabene.cse.unsw.edu.au> User-Agent: Mutt/1.5.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 02, 2004 at 03:46:49PM +1100, Neil Brown wrote: > On Sunday February 1, dan@debian.org wrote: > > I saw this a couple of weeks ago in a 2.6.0-test kernel, and today in > > 2.6.2-rc3. When I have to hit the hard reset button on my desktop, whose > > root filesystem is RAID5 on /dev/md0, it comes back up cleanly - no > > reconstruction. > > Cool, isn't it! > > > > > Have we gotten a whole lot more enthusiastic about marking superblocks clean > > lately, or should I be worried? Obviously this always used to trigger > > reconstruction, until recently. > > Yes. Lots more enthusiastic. > If there is no write activity for 20msec, we mark the superblock clean > and write it out, and are careful to write out a dirty superblock > before allowing another write to complete. Wow, thanks! That's really awesome, considering how long reconstruction takes this system (about an hour of completely useless otherwise). -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer