Hi Julian, On Fri, Nov 28, 2014 at 7:36 AM, Julian Elischer <[email protected]> wrote: > On 11/28/14, 3:12 AM, Neel Natu wrote: >> >> Hi Julian, >> >> On Thu, Nov 27, 2014 at 7:02 AM, Julian Elischer <[email protected]> >> wrote: >>> >>> I added WITNESS to a kernel I've been running and during boot I got this >>> result: >>> >>> vm exit[0] >>> reason VMX >>> rip 0xffffffff8078c1a7 >>> inst_length 7 >>> status 0 >>> exit_reason 2 >> >> That's a triple fault (from sys/amd64/vmm/intel/vmcs.h) >> >> #define EXIT_REASON_TRIPLE_FAULT 2 >> >> >>> qualification 0x0000000000000000 >>> inst_type 0 >>> inst_error 0 >>> Abort trap (core dumped) >>> >>> anyone have a decoder ring? >>> >> A few questions to narrow this down: >> >> Did you add WITNESS to the guest kernel or the host kernel when this >> happened? > > yes I added it to the guest kernel.. I suspect it ay be related to this, > especially since there was a kernel module loaded that was not recompiled. > I'm trying to ascertain now whether a withness kernel requires special > handling for its modules. > > >> >> Is this readily reproducible? > > don't know yet. >
Its interesting that the guest went all the way to a triple fault instead of stopping at the double fault handler. I'll be happy to track this down if there is a reliably repro case (guest binaries would be sufficient). best Neel >> >> Can you share the host and guest revision numbers? > > > guest is custom sources based on stable-10 on the same day as 10.0 was > released.basically whatever svn revision# was on 10.0 but on the stable > branch. > host is > FreeBSD 10.1-BETA1 #0 r271671: Tue Sep 16 09:31:23 PDT 2014 > > > > >> >> best >> Neel >> >>> julian >>> _______________________________________________ >>> [email protected] mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization >>> To unsubscribe, send any mail to >>> "[email protected]" > > _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "[email protected]"
