File 23906-xenpaging_remove_confusing_comment_from_p... of Package xen

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File 23906-xenpaging_remove_confusing_comment_from_p2m_mem_paging_populate.patch of Package xen (Revision 43b25d1f7f5589dd235134f645453186)

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changeset:   23906:7bf85c3fd9f0
user:        Olaf Hering <olaf@aepfle.de>
date:        Thu Oct 06 12:33:17 2011 +0100
files:       xen/arch/x86/mm/p2m.c
description:
xenpaging: remove confusing comment from p2m_mem_paging_populate

Currently there is no way to avoid the double check of the p2mt
because p2m_mem_paging_populate() is called from many places without
the p2m_lock held. Upcoming changes will move the function into
gfn_to_mfn(), so its interface could be changed and the extra
p2m_lock/get_entry can be removed.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Tim Deegan <tim@xen.org>

---
 xen/arch/x86/mm/p2m.c |    2 --
 1 file changed, 2 deletions(-)

Index: xen-4.1.2-testing/xen/arch/x86/mm/p2m.c
===================================================================
--- xen-4.1.2-testing.orig/xen/arch/x86/mm/p2m.c
+++ xen-4.1.2-testing/xen/arch/x86/mm/p2m.c
@@ -2961,8 +2961,6 @@ void p2m_mem_paging_populate(struct p2m_
     req.type = MEM_EVENT_TYPE_PAGING;
 
     /* Fix p2m mapping */
-    /* XXX: It seems inefficient to have this here, as it's only needed
-     *      in one case (ept guest accessing paging out page) */
     p2m_lock(p2m);
     p2m->get_entry(p2m, gfn, &p2mt, &a, p2m_query);
     if ( p2mt == p2m_ram_paged )

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File 23906-xenpaging_remove_confusing_comment_from_p2m_mem_paging_populate.patch of Package xen (Revision 43b25d1f7f5589dd235134f645453186)

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