Date: Sun, 30 Sep 2012 18:38:23 +0200 (CEST) From: Przemyslaw Frasunek <venglin@freebsd.lublin.pl> To: FreeBSD-gnats-submit@FreeBSD.org Subject: ports/172183: Severe filesystem corruption when running as KVM guest with VirtIO enabled Message-ID: <20120930163823.5AEDA47A381@lagoon.freebsd.lublin.pl> Resent-Message-ID: <201209301640.q8UGe10Z099313@freefall.freebsd.org>
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>Number: 172183
>Category: ports
>Synopsis: Severe filesystem corruption when running as KVM guest with VirtIO enabled
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-ports-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Sep 30 16:40:00 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Przemyslaw Frasunek
>Release: FreeBSD 9.0-RELEASE i386
>Organization:
nette.pl
>Environment:
FreeBSD 9.0-RELEASE running as KVM guest on Ubuntu 12.04 LTS host.
virtio-kmod compiled from ports on 26 Sep 2012.
Libvirt XML domain file on host:
<domain type='kvm'>
<name>lagoon-9.0</name>
<uuid>74b2fef0-bd43-11e1-9876-002219d6b4d6</uuid>
<memory>2097152</memory>
<currentMemory>2097152</currentMemory>
<vcpu>1</vcpu>
<os>
<type arch='x86_64' machine='pc-0.11'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none'/>
<source dev='/dev/mapper/vm-vm_lagoon--root'/>
<target dev='vda' bus='virtio'/>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none'/>
<source dev='/dev/mapper/vm-vm_lagoon--home'/>
<target dev='vdb' bus='virtio'/>
</disk>
<controller type='scsi' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</controller>
<controller type='ide' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<interface type='bridge'>
<mac address='54:52:00:2a:c5:6b'/>
<source bridge='br0'/>
<model type='virtio'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/>
<video>
<model type='cirrus' vram='9216' heads='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</memballoon>
</devices>
</domain>
>Description:
The VM was running stable for about three months with
emulated IDE block device. Few hours after migrating to VirtIO,
first panic occured:
ufs_dirbad: /home: bad dir ino 12294148 at offset 147456: mangled entry
After reboot & fsck, multiple other inodes were corrupted and
panic occurred every few minutes. After restoring VM image from
backup and switching back to emulated IDE, problem was resolved.
>How-To-Repeat:
Unknown.
>Fix:
Unknown.
>Release-Note:
>Audit-Trail:
>Unformatted:
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