Rusty Russell wrote:
These helper routines supply most of the virtqueue_ops for hypervisors which want to use a ring for virtio. Unlike the previous lguest implementation: 3) The page numbers are always 64 bit (PAE anyone?)
32 bits of page numbers give 44 bits of physical address on x86. That's 16TB per guest. Admittedly it's smaller on a VAX.
I don't like the chaining and would prefer the descriptor to refer to an array of page descriptors. However I can't complain since this isn't common code.
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