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Re: [Xen-devel] jumbo frames

On 11 May 2005, at 07:27, Kip Macy wrote:

What is the status of jumbo frame support in dom0 and domU? Unless
something has changed I know it isn't supported in domU, but shouldn't
it just work in dom0?

I think it'll just work, but it's untested. If the jumbo area spans
multiple memory pages then it needs to be allocated with something like
dma_alloc_coherent, or be represented by a fragmented skbuff. (i.e.,
hopefully the network stack and drivers don't assume that kmalloc()
always return physically contiguous memory extents).

What all would need to change to support it for domUs?

We need scatter-gather support on the device channel, and the frontend and backend both need to know how to queue and dequeue fragmented network buffers.

 -- Keir

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