RE: [Xen-devel] TPR write optimization (even improves 2003 sp2)

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> On 08/01/2009 00:40, "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
wrote:
> 
> > I just quickly implemented this as a 'proof of concept' by adding a
> > XENMAPSPACE_vlapic_regs function to XENMEM_add_to_physmap, and it
works,
> > but only after I removed regs_page from the vlapic struct and used
> > alloc_xenheap_page instead of alloc_domheap_page and then
> > share_xen_page_with_guest. Can I do it with alloc_domheap_page? It
> > didn't 'just work' when I did it that way... (and I had to comment
out
> > the use of regs_page in the vmx code to get it to compile, so as it
> > stands it probably wouldn't work on Intel).
> 
> Using alloc_xenheap_page would be okay.

Is it possible to map a page allocated with alloc_domheap_page into the
domain? The semantics must be different as it didn't work the way I
expected it to...

James


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