Re: [Xen-ia64-devel] [PATCH] fix the ia64 p2m semantic

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

forgot to attach the patch.

On Fri, Mar 23, 2007 at 11:38:34AM +0900, Isaku Yamahata wrote:
> Make the semantic same as the x86 one.
> So far the ia64 p2m has the semantic similar to
> (the x86 p2m) + (page reference count).
> But the differece from the x86 p2m have caused the breakage and work around.
> This patch make the ia64 p2m semantic same as x86 to solve it.
> - get_page() only for grant table page mapping and foreign domain page
>   mapping.
> - put_page() only for those pages.
> - guest_physmap_remove_page() doesn't touch PGC_allocated bit.
> 
> 
> I have to admit this patch is ugly.
> There's much room for clean up, especially get_page() right before put_page().
> But they aren't on performance critical path (memory exchange and
> decrease reservation).
> I'm rushing because I want to push this into 3.0.5.
> 
> Tsunehisa.
> I haven't tested arch_memory_op(). Could you verify it?
> 
> -- 
> yamahata
> 
> _______________________________________________
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> http://lists.xensource.com/xen-ia64-devel
> 

-- 
yamahata

Attachment: 14514_d1bd4110c3b1_fix_p2m_semantic.patch
Description: Text Data

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