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Re: [Xen-devel] address mapping between domains

On Tue, 8 Mar 2005, Mark Williamson wrote:

> The domain that's controlling the real device (usually dom0) maps the domU's 
> memory before putting data into it (either directly or using PIO).

Surely this could be optimised by (on a 64 bit system) mapping
all of physical memory into dom0 kernel virtual memory, so it
doesn't need to bother mapping and unmapping pages that IO is
being done to ?

"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it." - Brian W. Kernighan

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