Bug#638172: BUG: soft lockup - CPU#0 stuck for 61s! [qemu-dm:3205]

[Giuseppe Sacco <giuseppe@eppesuigoccas.homedns.org>]

Il giorno lun, 22/08/2011 alle 10.00 +0100, Ian Campbell ha scritto:
[...]
> @Giuseppe:
> 
> Can you confirm the versions of the xen and qemu-dm packages which you
> have got installed please.

$ COLUMNS=120 dpkg -l \*linux-image\* \*qemu-\*  | grep ^ii
ii  linux-image-2.6.32-5-xen 2.6.32-35                Linux 2.6.32 for modern PCs, Xen dom0 support
ii  linux-image-xen-686      2.6.32+29                Linux for modern PCs (meta-package), Xen dom0 support
ii  qemu-keymaps             0.12.5+dfsg-3squeeze1    QEMU keyboard maps
ii  qemu-system              0.12.5+dfsg-3squeeze1    QEMU full system emulation binaries
ii  qemu-utils               0.12.5+dfsg-3squeeze1    QEMU utilities
ii  xen-qemu-dm-4.0          4.0.1-2                  Xen Qemu Device Model virtual machine hardware emulator

> Also I think it would be useful to see the guest configuration file and
> details of the storage (filesystems, SCSI controllers etc) backing the
> guest storage which you have got configured.

I do host two VM:

1.
kernel = "/usr/lib/xen-default/boot/hvmloader"
builder='hvm'
memory = 1024
shadow_memory = 8
name = "piero"
#vif = [ 'mac=00:16:3e:6f:81:0a, type=ioemu, bridge=dummy0' ]
vif = [ 'type=ioemu, bridge=dummy0' ]
disk = [ 'phy:mapper/rootvg-piero--disk,hda,w' ]
device_model = '/usr/' + arch_libdir + '/xen-default/bin/qemu-dm'

2.
kernel = "/usr/lib/xen-default/boot/hvmloader"
builder='hvm'
memory = 512
shadow_memory = 8
name = "suse"
vif = [ 'mac=00:16:3e:6f:81:0a, type=ioemu, bridge=dummy0' ]
disk = [ 'phy:mapper/rootvg-suse32--disk,hda,w' ]
device_model = '/usr/' + arch_libdir + '/xen-default/bin/qemu-dm'

Xen is really version 4:

$ ls -ld /usr/lib/xen-* /etc/alternatives/xen-default
lrwxrwxrwx 1 root root   16  4 gen  2011 /etc/alternatives/xen-default -> /usr/lib/xen-4.0
drwxr-xr-x 5 root root 4096  3 gen  2011 /usr/lib/xen-4.0
drwxr-xr-x 3 root root 4096  9 dic  2010 /usr/lib/xen-common
lrwxrwxrwx 1 root root   29  4 gen  2011 /usr/lib/xen-default -> /etc/alternatives/xen-default

storage for both machines is on LVM: two volumes on the same volume
group rootvg. rootvg have one physical volume: a raid1 md0 built with
two SATA disks connected to the same controller.

centrum:~# vgs
  VG     #PV #LV #SN Attr   VSize   VFree  
  rootvg   1  13   0 wz--n- 370,35g 121,07g
centrum:~# pvs
  PV         VG     Fmt  Attr PSize   PFree  
  /dev/md2   rootvg lvm2 a-   370,35g 121,07g
centrum:~# cat /proc/mdstat 
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] 
md2 : active raid1 sda3[0] sdb3[1]
      388339136 blocks [2/2] [UU]
      
md1 : active raid1 sda2[0] sdb2[1]
      264960 blocks [2/2] [UU]
      
md0 : active raid1 sda1[0] sdb1[1]
      2102464 blocks [2/2] [UU]
      
unused devices: <none>
centrum:~# cat /sys/devices/pci0000:00/0000:00:12.0/host4/target4:0:0/4:0:0:0/model
SAMSUNG HD403LJ 
centrum:~# cat /sys/devices/pci0000:00/0000:00:12.0/host2/target2:0:0/2:0:0:0/model
SAMSUNG HD403LJ 

Bye,
Giuseppe