On Thu, Jul 11, 2019 at 07:05:53AM -0700, Sean Christopherson wrote:
> Ensuring the first hlt lands in an interrupt shadow should prevent getting
> into a halted state after the timer has been disabled, e.g.:
>
> irq_disable();
> test_tsc_deadline_timer();
>
> do {
> safe_halt();
> } while (!hitmax && table_idx < size);
Yes seems better, thanks for the suggestion (though I'll probably also
need to remove the hidden sti in start_tsc_deadline_timer).
Is safe_halt() really safe? I mean, IRQ handler could still run
before HLT right after STI right? Though no matter what I think it's
fine for this test case because we'll skip the first IRQ after all.
Just curious.
Thanks,
--
Peter Xu
