[Xen-devel] Re: [patch 06/26] Xen-paravirt_ops: paravirt_ops: allocate a fixmap slot

[Ingo Molnar <mingo@xxxxxxx>]

* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:

> Allocate a fixmap slot for use by a paravirt_ops implementation.  Xen 
> uses this to map the hypervisor's shared info page, which doesn't have 
> a pseudo-physical page number, and therefore can't be mapped 
> ordinarily.

why not vmalloc it on the guest side? fixmaps are bad for this purpose 
for a general paravirt implementation, it limits the size of the shared 
info page, etc.

        Ingo

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