> I'd be especially interested to know how we'd solve this for the
> network stuff, which currently relies on physically contiguous packets
> in memory. This is a *HUGE* change I think (larger than any we'd
> make to the VM system).
It's already fixed in the network stack for at least the most important
protocols. The 2.4 stack supports iovecs of pages in skbs and also linked
lists of skbs for a single packet. The biggest killer used to be
defragmentation; that will just pass around a linked list now. There are
cases where defragmentation-into-a-big-buffer is still needed (e.g. for
most of netfilter), but fixing that is just small incremental change.
-Andi
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