From owner-freebsd-fs@FreeBSD.ORG Mon May 21 22:09:38 2007 Return-Path: X-Original-To: freebsd-fs@freebsd.org Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id CA89016A468 for ; Mon, 21 May 2007 22:09:38 +0000 (UTC) (envelope-from rick@kiwi-computer.com) Received: from kiwi-computer.com (keira.kiwi-computer.com [63.224.10.3]) by mx1.freebsd.org (Postfix) with SMTP id 3ADCB13C44C for ; Mon, 21 May 2007 22:09:38 +0000 (UTC) (envelope-from rick@kiwi-computer.com) Received: (qmail 86217 invoked by uid 2001); 21 May 2007 22:12:32 -0000 Date: Mon, 21 May 2007 17:12:32 -0500 From: "Rick C. Petty" To: Kris Kennaway Message-ID: <20070521221232.GA86033@keira.kiwi-computer.com> References: <475187.33232.qm@web63006.mail.re1.yahoo.com> <4651F897.9010201@infidyne.com> <20070521195634.GA80608@xor.obsecurity.org> <20070521203556.GA84210@keira.kiwi-computer.com> <20070521203938.GA81333@xor.obsecurity.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070521203938.GA81333@xor.obsecurity.org> User-Agent: Mutt/1.4.2.1i Cc: freebsd-fs@freebsd.org Subject: Re: VERY frustrated with FreeBSD/UFS stability - please help or comment... X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: rick-freebsd@kiwi-computer.com List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 21 May 2007 22:09:38 -0000 On Mon, May 21, 2007 at 04:39:39PM -0400, Kris Kennaway wrote: > On Mon, May 21, 2007 at 03:35:56PM -0500, Rick C. Petty wrote: > > > > Hmm, this recently happened to me in 6.2-STABLE. I was unable to replicate > > it so filing a PR was pointless. What I saw happen was that /usr filled up > > completely (I caught it before it hit 100% full, but watched helplessly as > > it switched from time to space optimization). I even did a "du -hd0 /usr" > > and saw it only using about 20% of the file system. lsof and fstat weren't > > terribly helpful. After shutting down to single-user mode, I saw it full > > even though I deleted a lot of superfluous files, and du/df differences > > were still present. I restarted and fsck cleaned up the 80% "used" space, > > stating the superblock free maps were incorrect, which explains the > > discrepency. Why it happened, I'm still baffled. > > OK, it may be that the bug is still around in some form, or it could > be a different issue. One thing to check is whether you have a > snapshot active, because this will cause a very similar behaviour. I don't use snapshots, except for bgfsck, which wasn't necessary because everything preened clean. Like I said, it would be difficult to chase down. I should probably just enable kernel DDB in case it happens again. -- Rick C. Petty