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Re: [Qemu-devel] Hang on reboot in FreeBSD guest on Linux KVM host


From: Paolo Bonzini
Subject: Re: [Qemu-devel] Hang on reboot in FreeBSD guest on Linux KVM host
Date: Tue, 17 Jun 2014 06:21:23 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

Il 16/06/2014 18:47, John Nielsen ha scritto:
On Jun 16, 2014, at 10:39 AM, Paolo Bonzini <address@hidden> wrote:

Il 16/06/2014 18:09, John Nielsen ha scritto:
The only substantial difference on the hardware side is the CPU.
The hosts where the problem occurs use "Intel(R) Xeon(R) CPU
E5-2650 v2 @ 2.60GHz", while the hosts that don't show the
problem use the prior revision, "Intel(R) Xeon(R) CPU E5-2650 0 @
2.00GHz".

Can you do "grep . /sys/module/kvm_intel/parameters/*" on both hosts please?

No differences that I can see. Output below.

Not really:

Working host:
Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz
# grep . /sys/module/kvm_intel/parameters/*
/sys/module/kvm_intel/parameters/enable_apicv:N

Problem host:
Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz
# grep . /sys/module/kvm_intel/parameters/*
/sys/module/kvm_intel/parameters/enable_apicv:Y

So we have a clue. Let me study the code more, I'll try to get back with a suggestion.

In the meanwhile, I'm CCing the KVM list and BCCing QEMU, so that follow-ups come to the KVM list.

Paolo



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