[Xen-devel] SR-IOV, Paravirt Guest fails to obtain IRQ after first boot

["Robert Dunkley" <Robert@xxxxxxxxx>]

Hi Everyone,



I was wondering if there is a known fix for this issue? HVMs are fine.

I'm using the IGB driver and after guest reboot and xm destroy and
create I get the following error:
msix entry 0 for dev 05:10:0 are
not freed before acquire again.
msix entry 1 for dev 05:10:0 are
not freed before acquire again.
msix entry 2 for dev 05:10:0 are
not freed before acquire again.
msix entry 0 for dev 09:10:0 are
not freed before acquire again.
msix entry 1 for dev 09:10:0 are
not freed before acquire again.
msix entry 2 for dev 09:10:0 are
not freed before acquire again.

I was wondering if this is related to the first RHEL kernel note here:
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.6_Te
chnical_Notes/Known_Issues-kernel-xen.html

"A virtual function NIC might fail to get an IP address after several
iterations of creating and destroying a guest. To work around this
issue, diable interrupt remapping in the system BIOS for kernel-xen."

I don't have a bios setting for that and setting iommu=no-intremap in
Dom0 doesn't help either. Has anyone seen this problem before? Or know
how to fix it?



Thanks in advance,


Rob

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