Public bug reported:
Binary package hint: qemu-kvm
Since the 31st May I've been seeing random crashes in the virtual
machines that we run on an AMD processor based system in our office. We
run Ubuntu 10.04 on this server, which is a Dell T105 and I keep it
patched with all the updates. The virtual machines we run are all very
similar - they're our own build of Linux based around a 2.6.31 kernel.
On 31st of May, from looking at dpkg files, I see that I upgraded the
system's kernel to linux-image-2.6.32-32-server.
The crashes occur most commonly when these machines are doing lots of
processing, with libpoppler, ghostscript and our own software using most
of the cpu time.
I found that if I downgrade the kernel from linux-image-2.6.32-32-server
to linux-image-2.6.32-31-server on the Dell T105, then the system is
stable.
I tried upgrading the kernel to a prerelease linux-
image-2.6.32-33-server but still saw the freezes.
I tried the same virtual machines on two Dell T105 servers (1 dual-core
AMD Opteron 1214 processor) and on a Dell R210 server, running an Intel
Xeon processor. The crashes can be reliably caused on both of the AMD
based machines, but it seems that on the Intel based machine, linux-
image-2.6.32-32-server will happily run KVM virtual machines without
crashes.
Looks like one of changes in the kernel between 2.6.32-31 and 2.6.32-32
is the cause of this problem.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: qemu-kvm 0.12.3+noroms-0ubuntu9.9
ProcVersionSignature: Ubuntu 2.6.32-32.62-generic 2.6.32.38+drm33.16
Uname: Linux 2.6.32-32-generic x86_64
Architecture: amd64
Date: Sat Jun 18 15:52:52 2011
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
KvmCmdLine:
UID PID PPID C SZ RSS PSR STIME TTY TIME CMD
root 1934 1 5 178312 201544 0 15:49 ? 00:00:12 /usr/bin/kvm
-S -M pc-0.11 -enable-kvm -m 498 -smp 1 -name vpa5900 -uuid
770320e2-2d12-92cf-e5a9-97da88c3fd27 -chardev
socket,id=monitor,path=/var/lib/libvirt/qemu/vpa5900.monitor,server,nowait
-monitor chardev:monitor -boot c -drive
file=/var/vm/vpa5900/sda.qcow2,if=scsi,index=0,boot=on,format=qcow2,cache=none
-net nic,macaddr=52:54:00:61:36:00,vlan=0,model=virtio,name=virtio.0 -net
tap,fd=35,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0
-parallel none -usb -vnc 192.168.0.18:0 -vga std
root 1986 1 5 179013 204496 0 15:49 ? 00:00:13 /usr/bin/kvm
-S -M pc-0.11 -enable-kvm -m 498 -smp 1 -name vpa5901 -uuid
57cff0db-ab19-01fe-a2ea-3e127473c0e2 -chardev
socket,id=monitor,path=/var/lib/libvirt/qemu/vpa5901.monitor,server,nowait
-monitor chardev:monitor -boot c -drive
file=/var/vm/vpa5901/sda.qcow2,if=scsi,index=0,boot=on,format=qcow2,cache=none
-net nic,macaddr=52:54:00:4e:3e:33,vlan=0,model=virtio,name=virtio.0 -net
tap,fd=36,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0
-parallel none -usb -vnc 192.168.0.18:1 -vga std
root 2117 1 82 182383 337276 0 15:49 ? 00:02:48 /usr/bin/kvm
-S -M pc-0.11 -enable-kvm -m 512 -smp 1 -name vpa11000 -uuid
7fd6b400-6ef4-20f4-b1e3-1ecc413ecdf7 -chardev
socket,id=monitor,path=/var/lib/libvirt/qemu/vpa11000.monitor,server,nowait
-monitor chardev:monitor -boot c -drive
file=/var/vm/vpa11000/sda.qcow2,if=scsi,index=0,boot=on,format=qcow2,cache=none
-net nic,macaddr=52:54:00:03:72:ac,vlan=0,model=virtio,name=virtio.0 -net
tap,fd=39,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0
-parallel none -usb -vnc 192.168.0.18:5100 -vga std
Lsusb:
Bus 002 Device 003: ID 413c:2003 Dell Computer Corp. Keyboard
Bus 002 Device 002: ID 093a:2510 Pixart Imaging, Inc. Hama Optical Mouse
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. PowerEdge T105
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-32-generic
root=UUID=a5f141c2-ffe1-4084-aea8-0a071c334561 ro quiet splash
ProcEnviron:
LANG=en_GB.utf8
SHELL=/bin/bash
SourcePackage: qemu-kvm
dmi.bios.date: 02/01/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.1.0
dmi.board.name: 0RR825
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 7
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.1.0:bd02/01/2008:svnDellInc.:pnPowerEdgeT105:pvr(none):rvnDellInc.:rn0RR825:rvrA00:cvnDellInc.:ct7:cvr:
dmi.product.name: PowerEdge T105
dmi.product.version: (none)
dmi.sys.vendor: Dell Inc.
** Affects: qemu-kvm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug lucid
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You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to qemu-kvm in Ubuntu.
https://bugs.launchpad.net/bugs/799166
Title:
KVM virtual machines crash with host on linux-image-2.6.32-32-server
on AMD processor
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