From owner-freebsd-virtualization@freebsd.org  Tue Jul 14 13:56:30 2015
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Date: Tue, 14 Jul 2015 16:55:29 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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To: "freebsd-virtualization@freebsd.org" <freebsd-virtualization@FreeBSD.org>
Subject: Re: bhyve: centos 7.1 with multiple virtual processors
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On 23/06/2015 11:05, Andriy Gapon wrote:
> On 23/06/2015 10:26, Neel Natu wrote:
[snip]
>> Does this ever happen with a single vcpu guest?
> 
> Never seen the problem with a single CPU so far.
> Also, never had that problem with FreeBSD guests.
> 
>> The other mystery is the NMIs the host is receiving. I (re)verified to
>> make sure that bhyve/vmm.ko do not assert NMIs so it has to be
>> something else on the host that's doing it ...
> 
> But the correlation with the multi-CPU non-FreeBSD guests seems to be significant.

Today I've got another NMI with a Linux guest, but a few things were different:
- the host was fresh after a reboot
- the guest was single CPU
- the NMI happened during boot up of the very first VM

kernel: NMI ISA 2c, EISA ff
kernel: NMI ... going to debugger

Not what causes those NMIs but when they happen they always happen during a
bhyve guest boot...

-- 
Andriy Gapon