BUG: soft lockup – CPU#0 stuck for 60s!

C

charon

Renowned Member
Nov 30, 2008
120
1
83
Hi,

today I faced this problem during installation of a Ubuntu 10.04.3 KVM VM. I first thought that this was a BIOS or RAID Controller misconfiguration.
I was using latest proxmox-ve-2.6.35 kernel, to have KSM support. When I changed to proxmox-ve-2.6.32, the problem disappeared.
I found several similar thread, but at first glance, no solution yet.

If it is appreciated, I can help debugging, otherwise I'll stick to the 2.6.32 Kernel.

regards
 
pls post more details.
  • your hardware (mainboard, cpu)
  • post the output of 'pveversion -v' and 'cat /etc/qemu-server/VMID.conf'
  • which Ubuntu ISO do you use, Desktop or Server, amd64 or i386?
 
Hi Tom,

here we go:

# lspci
00:00.0 Host bridge: Intel Corporation 5520 I/O Hub to ESI Port (rev 13)
00:01.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 1 (rev 13)
00:03.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 3 (rev 13)
00:07.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 7 (rev 13)
00:09.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 9 (rev 13)
00:14.0 PIC: Intel Corporation 5520/5500/X58 I/O Hub System Management Registers (rev 13)
00:14.1 PIC: Intel Corporation 5520/5500/X58 I/O Hub GPIO and Scratch Pad Registers (rev 13)
00:14.2 PIC: Intel Corporation 5520/5500/X58 I/O Hub Control Status and RAS Registers (rev 13)
00:1a.0 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #4
00:1a.7 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #2
00:1c.0 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Root Port 1
00:1c.4 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Root Port 5
00:1d.0 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #1
00:1d.1 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #2
00:1d.2 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #3
00:1d.7 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #1
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 90)
00:1f.0 ISA bridge: Intel Corporation 82801JIR (ICH10R) LPC Interface Controller
00:1f.2 SATA controller: Intel Corporation 82801JI (ICH10 Family) SATA AHCI Controller
02:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02)
06:00.0 RAID bus controller: Hewlett-Packard Company Smart Array G6 controllers (rev 01)
07:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01)
07:00.1 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01)


CPU is a Intel(R) Xeon(R) CPU E5520 with HT and VT enabled.

processor : 7
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Xeon(R) CPU E5520 @ 2.27GHz
stepping : 5
cpu MHz : 2266.468
cache size : 8192 KB
physical id : 1
siblings : 8
core id : 3
cpu cores : 4
apicid : 23
initial apicid : 23
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips : 4533.33
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:

pveversion:

pve-manager: 1.8-18 (pve-manager/1.8/6070)
running kernel: 2.6.32-4-pve
proxmox-ve-2.6.32: 1.8-33
pve-kernel-2.6.32-4-pve: 2.6.32-33
qemu-server: 1.1-30
pve-firmware: 1.0-11
libpve-storage-perl: 1.0-17
vncterm: 0.9-2
vzctl: 3.0.28-1pve1
vzdump: 1.2-14
vzprocps: 2.0.11-2
vzquota: 3.0.11-1
pve-qemu-kvm: 0.14.1-1
ksm-control-daemon: 1.0-6

# cat /etc/qemu-server/103.conf
name: srv1
ide2: local:iso/ubuntu-10.04.3-server-amd64.iso,media=cdrom
virtio0: local:103/vm-103-disk-1.raw
vlan1: virtio=CA:C0:85:D6:56:B5
ostype: l26
memory: 4000
sockets: 1
vlan2: virtio=8E:B6:1A:89:D1:59
boot: cd
freeze: 0
cpuunits: 1000
acpi: 1
kvm: 1
onboot: 0
cores: 2
bootdisk: virtio0

It was a ubuntu-10.04.3-server-amd64.iso Image.
 
Yes, i simply have to boot into the latest 2.6.35 and start the Ubuntu VM.
 
do you also see this with Debian Squeeze VM?
 
The Server is not rolled out yet, but I am using it.
I can switch kernels and test it now, if it helps.
Just wait a couple of minutes.
 
It happened again. What can I do to help?

I am already installing debian squeeze!

edit: debian-testing-amd64-netinst.iso seems to run smoothly after installation.


A vanilla ubuntu 10.04.3 does not work..
Windows7 x64 also has problems.
 
Last edited:
For now I suggest you go for 2.6.32 (upcoming 2.6.32 kernels should have working KSM).
 
Hello,

Just to confirm that i have the same bug on my platform with the Kernel 2.6.35.

bye
 
2.6.35 has issues as I confirmed this bug along with CPU/IO on VMDK file format.
 
macday said:
hi tom, which 2.6.32 kernel has ksm now? pvetest ? thx macday
Click to expand...

we did not release one yet, still internal testing (but works well so far)
 
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