From owner-freebsd-bugs@FreeBSD.ORG Thu May 24 10:50:04 2012 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 6C3D8106566B for ; Thu, 24 May 2012 10:50:04 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 26BEB8FC14 for ; Thu, 24 May 2012 10:50:04 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id q4OAo4qE035349 for ; Thu, 24 May 2012 10:50:04 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.5/8.14.5/Submit) id q4OAo3CO035344; Thu, 24 May 2012 10:50:03 GMT (envelope-from gnats) Resent-Date: Thu, 24 May 2012 10:50:03 GMT Resent-Message-Id: <201205241050.q4OAo3CO035344@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Pete French Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 0DC49106566B for ; Thu, 24 May 2012 10:43:48 +0000 (UTC) (envelope-from petefrench@ingresso.co.uk) Received: from constantine.ingresso.co.uk (constantine.ingresso.co.uk [IPv6:2a02:b90:3002:e550::3]) by mx1.freebsd.org (Postfix) with ESMTP id 9A5198FC14 for ; Thu, 24 May 2012 10:43:47 +0000 (UTC) Received: from dilbert.london-internal.ingresso.co.uk ([10.64.50.6] helo=dilbert.ingresso.co.uk) by constantine.ingresso.co.uk with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76 (FreeBSD)) (envelope-from ) id 1SXVWE-0003Ry-Ed for FreeBSD-gnats-submit@freebsd.org; Thu, 24 May 2012 11:43:46 +0100 Received: from petefrench by dilbert.ingresso.co.uk with local (Exim 4.77 (FreeBSD)) (envelope-from ) id 1SXVWE-000GPM-Dx for FreeBSD-gnats-submit@freebsd.org; Thu, 24 May 2012 11:43:46 +0100 Message-Id: Date: Thu, 24 May 2012 11:43:46 +0100 From: Pete French To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Cc: Subject: kern/168298: VirtualBox using AIO on a zvol crashes X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Pete French List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 May 2012 10:50:04 -0000 >Number: 168298 >Category: kern >Synopsis: VirtualBox using AIO on a zvol crashes >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu May 24 10:50:03 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Pete French >Release: FreeBSD 8.3-STABLE amd64 >Organization: Ingresso Group Ltd >Environment: System: FreeBSD dilbert.london-internal.ingresso.co.uk 8.3-STABLE FreeBSD 8.3-STABLE #0: Sun May 6 14:15:46 BST 2012 petefrench@dilbert.london-internal.ingresso.co.uk:/usr/obj/usr/src/sys/GENERIC amd64 virtualbox-ose-kmod-4.1.14 >Description: With AIO loaded ViryialBox will use this to access files. Running VirtualBox on to of a zvol as the raw disc crashes. This may be a bug in zvol+aio, hence the classification above. VirtualBox prduces an error message in it's logs about AIO before crashing. >How-To-Repeat: Running VirtualBox over a zvol with AIO and then doing heavy disc write activity will provoke the problem in a few minutes. I made a posting to stable regarding this here: http://lists.freebsd.org/pipermail/freebsd-stable/2012-May/067648.html The zvol has compression enabled. >Fix: Do not load the AIO kernel module. VirtualBox is stable if AIO is not being used. >Release-Note: >Audit-Trail: >Unformatted: