From owner-freebsd-fs@FreeBSD.ORG Sun Jun 26 18:20:36 2005 Return-Path: X-Original-To: fs@freebsd.org Delivered-To: freebsd-fs@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 03DA516A41C for ; Sun, 26 Jun 2005 18:20:36 +0000 (GMT) (envelope-from skylar@cs.earlham.edu) Received: from quark.cs.earlham.edu (cs.earlham.edu [159.28.230.3]) by mx1.FreeBSD.org (Postfix) with ESMTP id A8D6843D1F for ; Sun, 26 Jun 2005 18:20:35 +0000 (GMT) (envelope-from skylar@cs.earlham.edu) Received: from quark.cs.earlham.edu (localhost [127.0.0.1]) by quark.cs.earlham.edu (8.13.4/8.13.3) with ESMTP id j5QIKVmr005401 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 26 Jun 2005 13:20:31 -0500 (EST) (envelope-from skylar@cs.earlham.edu) Received: (from skylar@localhost) by quark.cs.earlham.edu (8.13.4/8.13.3/Submit) id j5QIKV1o005400 for fs@freebsd.org; Sun, 26 Jun 2005 13:20:31 -0500 (EST) (envelope-from skylar@cs.earlham.edu) X-Authentication-Warning: quark.cs.earlham.edu: skylar set sender to skylar@quark.cs.earlham.edu using -f Date: Sun, 26 Jun 2005 13:20:31 -0500 From: Skylar Thompson To: fs@freebsd.org Message-ID: <20050626182031.GA5268@quark.cs.earlham.edu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="7AUc2qLy4jB3hD7Z" Content-Disposition: inline User-Agent: Mutt/1.4.2.1i X-Sender: "Skylar Thompson" X-Accept-Primary-Language: en X-Accept-Secondary-Language: es SMTP-Mailing-Host: quark.cs.earlham.edu X-Operating-System: FreeBSD 5.4-RELEASE-p1 X-Uptime: 1:17PM up 20 days, 19:04, 16 users, load averages: 0.29, 0.19, 0.17 X-Editor: VIM - Vi IMproved 6.3 (2004 June 7, compiled May 14 2005 15:15:17) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-1.6 (quark.cs.earlham.edu [127.0.0.1]); Sun, 26 Jun 2005 13:20:32 -0500 (EST) X-Virus-Scanned: ClamAV 0.85.1/957/Fri Jun 24 20:17:57 2005 on quark.cs.earlham.edu X-Virus-Status: Clean X-Sanitizer: This message has passed the MIMEDefang sanitizer. X-Sanitizer-URL: http://www.cs.earlham.edu/applied-groups/admin/ X-Sanitizer-Version: MIMEDefang/ECSanitizer $Revision: 1.18 $ X-Sanitizer-Config-Version: $Revision: 1.180 $ X-Scanned-By: MIMEDefang 2.51 on 192.168.0.3 X-Spam-Status: No, score=-2.8 required=8.0 tests=ALL_TRUSTED autolearn=failed version=3.0.3 X-Spam-Checker-Version: SpamAssassin 3.0.3 (2005-04-27) on quark.cs.earlham.edu Cc: Subject: Snapshot problems X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Skylar Thompson List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Jun 2005 18:20:36 -0000 --7AUc2qLy4jB3hD7Z Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable I've discovered a repeatable problem with FreeBSD's UFS2 snapshots. If I create several snapshots, and then do heavy disk I/O on the original filesystem (deletions, creations, simple touches, etc.) I can cause the I/O system to crash. There is no kernel panic, and the machine still answers pings, but no disk I/O occurs. I can replicate this on a dual-processor beige-box system with a Mylex RAID controller and a RAID-5 set, and also on a dual-processor Dell Poweredge 2650 with a PERC 3/i RAID controller and a RAID-5 set and RAID-1 set. FreeBSD 5.4-RELEASE is installed on both systems, and SMP is enabled as well, with HTT disabled on the Poweredge. I have DDB compiled in, so I can get debug information but I don't know what to look for. --=20 -- Skylar Thompson (skylar@cs.earlham.edu) -- http://www.cs.earlham.edu/~skylar/ --7AUc2qLy4jB3hD7Z Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCvvHvsc4yyULgN4YRAp9YAKCpPZsj14OGuuvinJgbKnN7H6EDcQCfWEWZ 5kmdDFdtkqlqLrE9VIzCiP4= =eauT -----END PGP SIGNATURE----- --7AUc2qLy4jB3hD7Z--