Dan Hecht wrote:
> Right. But that is only because Xen decides to allocate the page from
> the (machine) physical space, rather than from the pseudo-physical
> space. My question is: why doesn't Xen allocate shared_info from the
> pseudo-physical space?
Historical reasons ...
> If it had, then this page wouldn't need to be
> treated specially. I'm not sure, but I seem to remember on 64-bit
> Xen/XenLinux allocated shared_info from pseudo-physical space already...
Yep, the ia64 port which came later handles some things differently,
specifically some "magic" pages are allocated more clever ;)
Changing that for x86 would break existing guests though.
cheers,
Gerd
--
Gerd Hoffmann <[email protected]>
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