File 24586-x86-mm_Properly_account_for_paged_out_pag... of Package xen

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File 24586-x86-mm_Properly_account_for_paged_out_pages.patch of Package xen (Revision db46a29eba58b7202aa1204a97e352dc)

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changeset:   24586:7a28b8b2d3ea
user:        Andres Lagar-Cavilla <andres@lagarcavilla.org>
date:        Thu Jan 26 13:21:27 2012 +0000
files:       xen/arch/x86/mm/p2m.c
description:
x86/mm: Properly account for paged out pages

If we hit the page after nominate but before paging it out, don't decrement the
domain count of paged out pages.

Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Tim Deegan <tim@xen.org>

---
 xen/arch/x86/mm/p2m.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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
@@ -3154,7 +3154,8 @@ int p2m_mem_paging_prep(struct p2m_domai
     set_p2m_entry(p2m, gfn, mfn, 0, p2m_ram_paging_in, a);
     audit_p2m(p2m, 1);
 
-    atomic_dec(&p2m->domain->paged_pages);
+    if ( !page_extant )
+        atomic_dec(&p2m->domain->paged_pages);
 
     ret = 0;
  out:

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File 24586-x86-mm_Properly_account_for_paged_out_pages.patch of Package xen (Revision db46a29eba58b7202aa1204a97e352dc)

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