[Xen-users] CentOS domU hangs from time to time

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Subject:	[Xen-users] CentOS domU hangs from time to time
From:	Nathan Eisenberg <nathan@xxxxxxxxxxxxxxxx>
Date:	Fri, 9 Apr 2010 12:13:28 -0700
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Thread-topic:	CentOS domU hangs from time to time

I have a CentOS DomU that is hanging every 24-120 hours.  There's nothing in 
the logs that would indicate why.  The xm console for the DomU becomes 
nonresponsive, the DomU status goes to 'b', and an xm destroy/xm create is 
required to bring it back to life.

http://216.243.10.44/nathan/load.png
http://216.243.10.44/nathan/ram-cache.png
http://216.243.10.44/nathan/ram-free.png
http://216.243.10.44/nathan/swap-free.png
http://216.243.10.44/nathan/tmp-space.png

===DomU===

root@domu-xxx:~# uname -a
Linux domu-xxx 2.6.26-bpo.1-xen-amd64 #1 SMP Mon Nov 10 11:06:41 UTC 2008 
x86_64 x86_64 x86_64 GNU/Linux

root@domu-xxx:~# cat /etc/redhat-release
CentOS release 5.4 (Final)

===Dom0===

root@dom0-xxx:~# cat /etc/debian_version
5.0.4

root@dom0-xxx:~# uname -a
Linux dom0-xxx 2.6.26-bpo.1-xen-amd64 #1 SMP Mon Nov 10 11:06:41 UTC 2008 
x86_64 GNU/Linux

root@dom0-xxx:~# cat /etc/xen/xxx.cfg
#
# Configuration file for the Xen instance xxx, created
# by xen-tools 3.9 on Thu Apr 16 11:46:46 2009.
#

#
#  Kernel + memory size
#
kernel      = '/boot/vmlinuz-2.6.26-bpo.1-xen-amd64'
ramdisk     = '/boot/initrd.img-2.6.26-bpo.1-xen-amd64'
memory      = '3000'
vcpus       = '3'
cpus="^0"
extra = 'xencons=tty'

#
#  Disk device(s).
#
root        = '/dev/sda2 ro'
disk        = [
                  'phy:/dev/vg00/xxx-swap,sda1,w',
                  'phy:/dev/vg00/xxx-disk,sda2,w',
              ]
#
#  Hostname
#
name        = 'xxx'

#
#  Networking
#
vif         = [ 'ip=xxx,mac=xxx' ]

#
#  Behaviour
#
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'
extra = 'console=hvc0 xencons=tty'


Nathan Eisenberg


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[Xen-users] CentOS domU hangs from time to time