> We have recorded retransmitted IPI's on some boards (notably the
> infamous BP6). They do happen. Early 2.4 had a fix for handling the
> replay case too, but someone lost it and BP6 boards no longer work as
> reliably.
Ok, all non broken hardware.
>
> An IPI can be retried and the retry for dual PII at least seems to hit
> all the CPUs. Even on a 2 CPU box this has been observed - I assume
> because the error was raised by the IO APIC when it got a garbled IPI.
I don't believe it. It would cause an immediate hang because the goto out
does not ack the IPI. Surely such hangs would have been reported?
-Andi
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