[pve-devel] Qemu / virtio-rng-pci

Stefan Priebe - Profihost AG s.priebe at profihost.ag
Mon Jun 1 14:58:16 CEST 2015

Am 01.06.2015 um 14:51 schrieb Alexandre DERUMIER:
> I just send a patch.

Oh great.

> can you test it ?

Sure. I'm just thinking about the check regarding Qemu 2.3. I would also
like to use it for older qemu versions / installations.

Is there no other way to support it and not to break live migration?

> (I'm using /dev/random, not sure we want to add support for hardware entropy devices ?)

I think not right now. Intel already implemented a CPU Feature flag, so
that you do not need entropy devices at all. So i think they get
replaced anyway.

See: http://en.wikipedia.org/wiki/RdRand


> ----- Mail original -----
> De: "Stefan Priebe" <s.priebe at profihost.ag>
> À: "pve-devel" <pve-devel at pve.proxmox.com>
> Envoyé: Lundi 1 Juin 2015 12:41:56
> Objet: [pve-devel] Qemu / virtio-rng-pci
> Hi, 
> while i had not enough entropy in some virtual machines i was wondering 
> why we don't use virtio-rng-pci as default which is available since qemu 
> 1.3? 
> Here is a red hat article on it: 
> http://rhelblog.redhat.com/2015/03/09/red-hat-enterprise-linux-virtual-machines-access-to-random-numbers-made-easy/ 
> Stefan 
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