[Xen-devel] Xen 4.1 interrupts not delievered.

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

Hey folks,

The last month there was a flurry of emails about PCI passthrough devices and
some that in which a high load is put on machine and interrupts are
not being delivered (to Dom0 it looks that way) - and even the cases where
there are no PCI passthrough enabled.

Three things that pop up is that:
 1). Xen 3.4.4-rc1-pre does not have this problem (this is Mr. Christopher
     email about 3Ware 9690SA).
 2). Moving all Domains from physical cpu 0 makes the problem go away
     (this is Mr. Sander email about High cpu load for events/0).
 3). No fixes yet.

A couple of that might fix the problems are:

 1). Ian's fix to the event channels:
http://xenbits.xen.org/gitweb?p=people/ianc/linux-2.6.git;a=commit;h=5d30cb2a85912ffb5f6556d55472c26801eef2ea
 2). Disable IRQ balancing in Xen (and also in Linux kernel). "noirqbalance"
 3). Pin domains, but nothing to Domain 0.

But it might be worth trying them out?

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