Yang, Sheng wrote:
After check host shared interrupts situation, I got a question here:
If I understand correctly, current solution don't block host shared irq, just
come with the performance pentry. The penalty come with host disabled irq
line for a period. We have to wait guest to write EOI. But I fail to see the
correctness problem here (except a lot of spurious interrupt in the guest).
I've checked mail, but can't find clue about that. Can you explain the
situation?
If the guest fails to disable interrupts on a device that shares an
interrupt line with the host, the host will experience an interrupt
flood. Eventually the host will disable the host device as well.
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I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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