From owner-freebsd-current@FreeBSD.ORG Thu Nov 8 18:57:21 2007 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DDE6916A420 for ; Thu, 8 Nov 2007 18:57:21 +0000 (UTC) (envelope-from pho@holm.cc) Received: from relay02.pair.com (relay02.pair.com [209.68.5.16]) by mx1.freebsd.org (Postfix) with SMTP id 79B8513C4A6 for ; Thu, 8 Nov 2007 18:57:21 +0000 (UTC) (envelope-from pho@holm.cc) Received: (qmail 19844 invoked from network); 8 Nov 2007 18:30:30 -0000 Received: from unknown (HELO peter.osted.lan) (unknown) by unknown with SMTP; 8 Nov 2007 18:30:30 -0000 X-pair-Authenticated: 83.95.197.164 Received: from peter.osted.lan (localhost.osted.lan [127.0.0.1]) by peter.osted.lan (8.13.6/8.13.6) with ESMTP id lA8IUUJu033035; Thu, 8 Nov 2007 19:30:30 +0100 (CET) (envelope-from pho@peter.osted.lan) Received: (from pho@localhost) by peter.osted.lan (8.13.6/8.13.6/Submit) id lA8IUSmA033034; Thu, 8 Nov 2007 19:30:28 +0100 (CET) (envelope-from pho) Date: Thu, 8 Nov 2007 19:30:27 +0100 From: Peter Holm To: Ken Smith Message-ID: <20071108183027.GA32851@peter.osted.lan> References: <471427BE.10500@freebsd.org> <20071016112907.GD6511@deviant.kiev.zoral.com.ua> <4715FAA7.7030404@freebsd.org> <20071018093948.GN6511@deviant.kiev.zoral.com.ua> <20071019091249.GI88271@carrick.bishnet.net> <1194457019.35649.82.camel@opus.cse.buffalo.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1194457019.35649.82.camel@opus.cse.buffalo.edu> User-Agent: Mutt/1.4.2.1i Cc: Tim Bishop , freebsd-current@freebsd.org, avleeuwen@piwebs.com, Rolf Witt , Kostik Belousov , Pieter de Goeje Subject: Re: panic: ffs_blkfree: freeing free block 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: Thu, 08 Nov 2007 18:57:22 -0000 On Wed, Nov 07, 2007 at 12:36:59PM -0500, Ken Smith wrote: > On Tue, 2007-10-23 at 11:35 +0200, Arjan van Leeuwen wrote: > > 2007/10/19, Tim Bishop : > > > > > > On Thu, Oct 18, 2007 at 06:40:04PM +0200, Arjan van Leeuwen wrote: > > > > > are softupdates on ? > > > > > > > > > > Yes. Turning them off seems to fix the problem (fingers crossed - I > > > only > > > > > turned it off this morning, didn't have a panic yet) > > > > > > > > After working for a whole day without softupdates, I can say that > > > turning > > > > them off at least causes less panics to happen than with them turned on, > > > > maybe they even don't happen at all without softupdates; I haven't had a > > > > panic all day, while I have one every few hours with softupdates turned > > > on. > > > > > > I've been running for the best part of a day now with softupdates turned > > > off and so far no panics. I'm running tinderbox on the host, and it > > > would quite reliably crash it before. > > > > > > Of course it's hard to say if this has fixed the problem... maybe it > > > doesn't happen as often, or maybe my data is being slowly chewed up > > > instead ;-) > > > > It looks like on the same system, I'm able to reliably panic zfs as well, > > under the exact same conditions (i.e. linking a particularly big piece of > > software). Maybe this is not a problem in the filesystem at all. I've not > > been able to get a coredump yet from the zfs panic. > > This is in 7.0-PRERELEASE, btw (I switched to RELENG_7 when the branching > > happened). > > Is anyone who had been able to trigger this panic still having problems > with recent kernels (and soft updates turned on)? I've checked with a > few people who had been experiencing the panic and they can no longer > trigger it. > > It's at least a tiny bit possible some of the VM fixes that have gone in > addressed this problem. We'd like to find out if anyone can still > trigger this. > I have been hunting this problem for a while, but not been able to reproduce it lately. -- Peter Holm