XEN kernel fault (soft lockup) on domU hardy

[Vigh Zoltán]

Hi, i have a problem with my production system running ubuntu hardy: I 
run 3 xen servers where i have one hardy guest for mysql and one hardy 
guest for apache-php-lighttpd-squid. The webserver farm gets its data 
from a ocfs2 partition. My webserver guests are dying with kernel page 
faults, i heard of a kernel problem with the hardy xen kernel, so i 
thought of changing kernels, but the Intrepid kernel has OCFS2 1.5.0 
modules, the hardy 1.3.3, and i have 2 other servers who talk to the 
OCFS2 partition, where i cannot afford a distupgrade. I also saw on 
launchpad 1-2 long unresolved soft lockup related bug. Any ideas to 
this? Currently we are thinking to abandon XEN, and virtualization (KVM 
is not an option , because the hardware doesnt support it).

os: ubuntu 8.04.2
kernel: 2.6.24-19-xen (we currently try -23)

thx,

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Vigh Zoltán
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