Re: [Engine-devel] host cpu feature
----- Original Message -----
From: "Yaniv Kaul" <ykaul(a)redhat.com>
To: "Laszlo Hornyak" <lhornyak(a)redhat.com>
Cc: "engine-devel" <engine-devel(a)ovirt.org>
Sent: Wednesday, December 5, 2012 12:23:47 PM
Subject: Re: [Engine-devel] host cpu feature
On 12/05/2012 12:32 PM, Laszlo Hornyak wrote:
> Hi,
>
> CPU-Host support allows the virtual machines to see and utilize the
> host's CPU flags, this enables better performance in VM's, at the
> price of worse portablity.
>
> http://www.ovirt.org/Features/Cpu-host_Support
>
> Your feedback is welcome!
>
> Thank you,
> Laszlo
> _______________________________________________
> Engine-devel mailing list
> Engine-devel(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/engine-devel
- I assume that when you allow migration, you'd use host-model? This
is
not clear from the design. It seems like we VDSM developers can
choose
to use either this or passthrough, while in practice we should
support both.
If AllowMigrateCPUHost is set to true (in case you have the same cpu model everywhere in
your DC) migration of such hsots will be enabled. Otherwise it will not be enabled.
- I'm still convinced and commented on both relevat oVirt and libvirt
BZs that we need to add x2apic support to the CPU, regardless of what
the host CPU exposes.
AFAIK, the KVM developers agree with me.
Not quite sure how is this related... could you send some URL's for the bugreports?
Y.