Messages in this thread | | | Date | Wed, 14 Feb 2007 09:43:49 +0100 | From | Gerd Hoffmann <> | Subject | Re: [patch 05/21] Xen-paravirt: paravirt_ops: allocate a fixmap slot |
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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 <kraxel@suse.de> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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