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Re: [Qemu-devel] live migration fails after host kernel upgrade (3.12 =>

From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] live migration fails after host kernel upgrade (3.12 => 3.18)
Date: Mon, 23 Mar 2015 11:54:30 +0000
User-agent: Mutt/1.5.23 (2014-03-12)

On Sun, Mar 15, 2015 at 09:59:25AM +0100, Stefan Priebe wrote:
> after upgrading the host kernel from 3.12 to 3.18 live migration fails with
> the following qemu output (guest running on a host with 3.12 => host with
> 3.18):
> kvm: Features 0x30afffe3 unsupported. Allowed features: 0x79bfbbe7
> qemu: warning: error while loading state for instance 0x0 of device
> '0000:00:12.0/virtio-net'
> kvm: load of migration failed: Operation not permitted
> But i can't

Hi Stefan,
I haven't checked the exact feature bits but it might be the UFO feature
problem.  The tun driver was changed to drop a feature, this broke live

Take a look at


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