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Re: [Xen-devel] [PATCH] xen: add persistent grants to xbd_xenbus

To: Roger Pau Monné <roger.pau@xxxxxxxxxx>
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Mon, 12 Nov 2012 15:34:00 +0000
Cc: Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx>, "port-xen@xxxxxxxxxx" <port-xen@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
Delivery-date: Mon, 12 Nov 2012 15:34:43 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On Mon, 2012-11-12 at 09:30 +0000, Roger Pau MonnÃ wrote:
> 
> I will try to perform a similar test with a NetBSD Dom0, but with the
> patch it will probably be a little bit slower than without it (because
> we have to perform the memcpy in the frontend, 

Doesn't the frontend fallback to the same old code as always if the b/e
doesn't advertise the new feature?

Ian.


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