Re: [Xen-devel] Virtio on Xen

["Peter X. Gao" <peterxianggao@xxxxxxxxx>]

Hi Konrad,

     Just to make sure I understand everything. So I need to set up
2MB hugepage in Dom0 and use a module to share it with a HVM guest.
How could I compile the module?
     Inside the DomU, how could I see the shared 2MB hugepages? Do I
need another frontend driver? Many thanks.

Regards
Peter

On Wed, Mar 5, 2014 at 10:02 AM, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:
> On Tue, Feb 11, 2014 at 01:01:40PM +0000, Ian Campbell wrote:
>> On Mon, 2014-02-10 at 10:07 -0800, Peter X. Gao wrote:
>> > Thanks for your reply. I am now using virtio-net and it seems working.
>> > However, Intel DPDK also requires hugepage. When a DPDK application is
>> > initiating hugepage, I got the following error. Do I need to config
>> > something in Xen to support hugepage?
>>
>> I'm not sure about the status of superpage support in mainline kernels
>> for PV Xen guests. IIRC there was a requirement to add a Xen command
>> line flag to enable it at the level.
>>
>> Or you could just use an HVM guest, since no special support is needed
>> for hugepages there.
>>
>> But maybe I'm confused because I think your use of virtio-net would
>> necessarily require that you be using an HVM not PV guest.
>>
>> But then looking at your logs I see Xen PV block and net but no sign of
>> virtio -- so I suspect you are actually doing PV and not using
>> virtio-net at all.
>
> DPDK 1.6 is out - and you can do Xen. You need to use HVM guests and
> a special module in dom0 to setup 2MB contingous pages that
> is shared with the guest.
>
> The protocol that DPDK uses is VirtIO.
>
> See:
> http://dpdk.org/browse/dpdk/commit/?id=47bd46112b710dc59b1becfb67e18da319c5debe
> http://dpdk.org/browse/dpdk/commit/?id=148f963fb5323c1c6b6d5cea95084deb25cc73f8
>
>>
>> Ian.
>>
>>
>>
>> _______________________________________________
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>> Xen-devel@xxxxxxxxxxxxx
>> http://lists.xen.org/xen-devel

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