On Wed, Apr 1, 2015 at 4:19 PM, Paolo Bonzini <pbonz...@redhat.com> wrote: > > > On 01/04/2015 14:26, Andrey Korolyov wrote: >> Yes, I disabled host watchdog during runtime. Indeed guest-induced NMI >> would look different and they had no reasons to be fired at this stage >> inside guest. I`d suspect a hypervisor hardware misbehavior there but >> have a very little idea on how APICv behavior (which is completely >> microcode-dependent and CPU-dependent but decoupled from peripheral >> hardware) may vary at this point, I am using 1.20140913.1 ucode >> version from debian if this can matter. Will send trace suggested by >> Paolo in a next couple of hours. Also it would be awesome to ask >> hardware folks from Intel who can prove or disprove my abovementioned >> statement (as I was unable to catch the problem on 2603v2 so far, this >> hypothesis has some chance to be real). > > Yes, the interaction with the NMI watchdog is unexpected and makes a > processor erratum somewhat more likely. > > Paolo
http://xdel.ru/downloads/kvm-e5v2-issue/trace-nmi-apicv-fail-at-reboot.dat.gz err, no NMI entries nearby failure event, though capture should be correct: /sys/kernel/debug/tracing/events/kvm*/filter /sys/kernel/debug/tracing/events/*/kvm*/filter /sys/kernel/debug/tracing/events/nmi*/filter /sys/kernel/debug/tracing/events/*/nmi*/filter
