On Fri, Nov 10, 2006 at 12:00:56AM +0100, Manuel Bouyer wrote: > > Is it something that can be influenced by the ELF headers of the dom0 > > kernel? I know there were some changes recently (as part of the 3.0.3 > > support) to load addresses and other possibly promising parameters.. > > Actually putting a limit on dom0 memory may not be enough; a network buffer > from a domU can end up in the DMA descriptor of the network adapter Hm, I suppose so. Normally this would be a good thing. :-) Would it matter if the traffic was being bridged vs routed? Probably not. > > Any other clues? > > How does the driver deal with this limitation ? Does it work with a plain > i386 kernel ? It doesn't. There have been some unsucessful attempts at a bounce-buffer style solution in the driver, and some discussion of adding various kinds of more general "dma constraints" properties, but at present the driver just fails if used with >1G native. Both of these ideas would probably get even more complicated under Xen. -- Dan.
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