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Date:      Sun, 11 Dec 2016 09:11:18 -0800
From:      Peter Grehan <grehan@freebsd.org>
To:        Rajil Saraswat <rajil.s@gmail.com>
Cc:        freebsd-virtualization@FreeBSD.org
Subject:   Re: Debian 8 CPU stall
Message-ID:  <131518ab-c3fc-6509-ba24-08b5c32cddd5@freebsd.org>
In-Reply-To: <abc9aca0-ce64-a9d9-213a-957e0a599284@gmail.com>
References:  <b011b080-5637-2da5-8a8a-819b7b1fabd3@gmail.com> <9c9e83a5-16c6-0ab5-0ac4-af0a54430706@freebsd.org> <6cff5bf2-9654-8627-83c4-6ab48ee763b5@gmail.com> <56863fec-d8f8-2601-811f-511cd199e82f@freebsd.org> <abc9aca0-ce64-a9d9-213a-957e0a599284@gmail.com>

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Hi Rajil,

> I don't seem to have that sysctl on my system. Should i create one?

  It's there:

> # sysctl -a |grep vmm
...
> hw.vmm.vmx.cap.posted_interrupts: 1
> hw.vmm.vmx.cap.virtual_interrupt_delivery: 1

  The easiest way to disable APIC virtualization is to add this line to 
/boot/loader.conf and reboot

hw.vmm.vmx.use_apic_vid="0"

(I got that wrong in the previous email; should have been zero)

  On a reboot, the above sysctl leaves should be set to 0.

later,

Peter.



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