Hi Julian,

On Thu, Nov 27, 2014 at 7:02 AM, Julian Elischer <jul...@freebsd.org> 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?

Is this readily reproducible?

Can you share the host and guest revision numbers?

best
Neel

>
> julian
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