Re: [Xen-users] PVH for debian guest

[Roger Pau Monnà <roger.pau@xxxxxxxxxx>]

El 18/01/16 a les 12.44, George Dunlap ha escrit:
> On Sun, Jan 17, 2016 at 4:40 PM, ÃliÃs TamÃs <et@xxxxxxx> wrote:
>> Hi.
>>
>> I wouldlike to receive the list's opinion about XEN PVH mode for LINUX
>> guests. The dom0 is a linux (running dom0pvh) and the guests are also
>> linux machines.
>>
>> Up to these days I had the opnion that there is nothing that can be
>> faster then PV, But on the net I found somany articles and benchmarks,
>> but none of them says anything about PVH-based linux guest.
>>
>>
>> Some time ago on this list I read, that someone has tried it and
>> suprisingly he got better results with hw assisted virtualized system
>> calls, then the native PV ones. Could someone enlighten me?
>>
>> Is it worth setting the
>> "pvh=1" parameter for linux guests? (I tried, practically this is the
>> only change I need to make to utilize this new mode). So it seems to be
>> an easy win. But is it a win for linux guests? Sould oi stay with PV or
>> go to PVH?
> 
> You should also be aware that PVH is still marked "experimental", and
> is actually going through an architectural overhaul at the moment.
> Until it's marked as "supported":
> 1. PVH may not be stable or have optimal performance
> 2. It may break and / or require a kernel upgrade when you do a Xen upgrade.
3. There's no security support for PVH guests in Xen.

Roger.


_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users