Date: Thu, 24 May 2012 11:43:46 +0100 From: Pete French <petefrench@ingresso.co.uk> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/168298: VirtualBox using AIO on a zvol crashes Message-ID: <E1SXVWE-000GPM-Dx@dilbert.ingresso.co.uk> Resent-Message-ID: <201205241050.q4OAo3CO035344@freefall.freebsd.org>
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>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:
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