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RE: [Xen-devel] jumbo frames
| To: | "Kip Macy" <kip.macy@xxxxxxxxx>, "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-devel] jumbo frames |
| From: | "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx> |
| Date: | Wed, 11 May 2005 19:11:00 +0100 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Kip Macy <kmacy@xxxxxxxxxx> |
| Delivery-date: | Wed, 11 May 2005 18:10:35 +0000 |
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| Thread-index: | AcVWQGV2bFKTRLJ4T5SaGpbu3brPywAEKPwQ |
| Thread-topic: | [Xen-devel] jumbo frames |
> > > 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 > > Is it anywhere on the roadmap? Post 3.0. Having it working in dom0 is good enough for iSCSI. Unfortunately, many of the drivers use pci_map_page even for jumbo frames, which is defined as dma_map_page which uses page_to_phys and assumes that only a single page is being mapped. I think we'll need to create another cache for jumbo frames and bless them with xen_contig_memory in the ctor function. Hmm, I'm not sure that ctor functions can return failure, though... Ian _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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