Big error with 2.6.32-19-pve on HP server

Could you try do the following:
In /etc/default/grub change GRUB_CMDLINE_LINUX_DEFAULT="quiet " to
GRUB_CMDLINE_LINUX_DEFAULT="quiet iommu=off "

Then run:
update-grub
update-initramfs -u

Finally reboot the server.

If this prevents your server from crashing you can try fine tuning iommu. Read more here:
http://www.mjmwired.net/kernel/Docum...ptions.txt#208