On 01/04/2015 13:49, Radim Krčmář wrote: > 2015-03-31 21:23+0300, Andrey Korolyov: >> On Tue, Mar 31, 2015 at 9:04 PM, Bandan Das <bsd@xxxxxxxxxx> wrote: >>> Bandan Das <bsd@xxxxxxxxxx> writes: >>>> Andrey Korolyov <andrey@xxxxxxx> writes: >>>> ... >>>>> http://xdel.ru/downloads/kvm-e5v2-issue/another-tracepoint-fail-with-apicv.dat.gz >>>>> >>>>> Something a bit more interesting, but the mess is happening just >>>>> *after* NMI firing. >>>> >>>> What happens if NMI is turned off on the host ? >>> >>> Sorry, I meant the watchdog.. >> >> Thanks, everything goes well (as it probably should go there): >> http://xdel.ru/downloads/kvm-e5v2-issue/apicv-enabled-nmi-disabled.dat.gz > > Nice revelation! Yes, pretty random but good to know. Can you try again with the nmi/nmi_handler tracepoint also? Paolo > KVM doesn't expect host's NMIs to look like this so it doesn't pass them > to the host. What was the watchdog that casually sent NMIs? > (It worked after "nmi_watchdog=0" on the host?) > > (Guest's NMI should have a different result as well. NMI_EXCEPTION is > an expected exit reason for guest's hard exceptions, they are then > differentiated by intr_info and nothing hinted that this was a NMI.) > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
