* Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > On Wed, 2010-06-09 at 12:41 +0300, Avi Kivity wrote: > > > > >> Disabling the watchdog is unfortunate. Why is it necessary? > > >> > > > perf always uses NMI, so we disable the nmi_watchdog when a perf_event is > > > set up in case they might have impact. > > > > > > > Ok. Is that the case for the hardware pmus as well? If so it might be > > done in common code. > > The x86 hardware pmu implementation disables the lapic watchdog too, but > recent kernels come with a watchdog implementation on top of perf, the old > lapic one will be depricated. Note, that code is in -tip, queued for v2.6.36. Ingo -- 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
