* Guenter Roeck <[email protected]> wrote:
> > I _think_ most such callers calling an SMP function call for
> > offline or out of range CPUs are at minimum racy.
>
> Not really; at least the online cpu part is an absolutely normal use
> case for qemu-arm.
The problem is that an IPI is attempted to be sent to a non-existent
CPU AFAICS, right?
> Sure, you can argue that "this isn't the real system", and that
> qemu-arm should be "fixed", but there are reasons - the emulation is
> (much) slower if the number of CPUs is set to 4, and not everyone
> who wants to use qemu has a system with as many CPUs as the emulated
> system would normally have.
That's all fine and good, but why is an IPI sent to a non-existent
CPU? It's not like we don't know which CPU is up and down.
Thanks,
Ingo
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