Paolo Bonzini <pbonz...@redhat.com> writes: > Il 18/06/2014 18:43, Bandan Das ha scritto: >>> > mwait and monitor are currently handled as nop. Considering this >>> > behavior, they >>> > should still be handled correctly, i.e., check execution conditions and >>> > generate >>> > exceptions when required. mwait and monitor may also be executed in >>> > real-mode >> Is this necessary ? They are NOPs and kvm prints that out (correctly so) to >> dmesg. >> Implementing them correctly is a different thing, but adding extra checks >> for NOPs >> just seems like adding extra cycles. > > Raising the correct exception is a good thing, though. The guest is > going to busy wait anyway, it doesn't matter how fast it does that. :)
Thanks, makes sense. I was also thinking why to advertise it at all, but it's probably more common than I think it is. > Paolo > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
