RE: [Xen-users] Setting up a "dumb" network for domU's

["Ulrich Windl" <ulrich.windl@xxxxxxxxxxxxxxxxxxxx>]

On 6 Dec 2006 at 12:47, Petersson, Mats wrote:

> > The remaining question is: Why are there only three bridged 
> > supported in XEN (docs 
> > say so). Where is that limit, and can it be raised?
> 
> Because each page (4K) can hold 3 x 1536 bytes of network packets -
> which means that the buffer(s) for the network devices can all be fitted
> into a single page. 

Ah, that explains why there are not virtual jumbo frames ;-)
Still I wonder why different bridged must share a page. Traffic should be quite 
idependent on each bridge.

> 
> It can be raised, but it's non-trivial, as far as I understand it. 

Regards,
Ulrich


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