Re: [Xen-devel] spurious interrupts

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

>>> Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> 12.04.06 19:21:44 >>>
>This happens definitely immediately after writing to the IO-APIC? There 
>is an ack_APIC_irq() not many instructions after that, and it would 
>make much more sense for the IRR flag to be set after that. :-)

Yes, definitely there. I added (long) delays before masking and after masking 
(and also after ack-ing). The delay
routine spins on reading the (expected) other redir entry, and the first 
iteration of it after the masking sees the ill
irr bit turned on.

Jan

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