pci-passthrough in pvops causing offline raid

[Mark Adams <mark@campbell-lange.net>]

Hi All,

Running xen 4.0.1-rc6, debian squeeze 2.6.32-21.

In a voip setup, where I have forwarded the onboard NIC interfaces
through to domU using the following grub config:

module  /vmlinuz-2.6.32-5-xen-amd64 placeholder root=UUID=25c3ac79-6850-498d-afcf-ea42970e94fd ro  quiet xen-pciback.permissive xen-pciback.hide=(02:00.0)(03:00.0) pci=resource_alignment=02:00.0;03:00.0

I'm having a serious issue where the raid card goes offline after an
indefinate period of time. Sometimes runs fine for a week, other times 1
day before I get "offline device" errors. Rebooting the machine fixes it
straight away, and everything is back online.

What in the Xen pciback is causing the raid card to go offline? The
only devices hidden are the 2 onboard NIC's.

I know that this issue is with Xen, as I had this running on a different
server (same xen setup) and it had the same issues, which I initially
thought were to do with the raid card.

Is there known issues in this kernel and xen version with pciback? I'm
going to update to the current package versions this evening (4.0.1-1
and 2.6.32-27) however would appreciate if anyone has any other insight
into this issue, or even just a note to say it is a bug that has been
fixed in current versions!

Thanks,
Mark