[Xen-devel] [PATCH 4 of 4] xenpaging: handle paged pages in p2m_pod_decrease_reservation

[Olaf Hering <olaf@xxxxxxxxx>]

# HG changeset patch
# User Olaf Hering <olaf@xxxxxxxxx>
# Date 1317652812 -7200
# Node ID b05ede64aaf5f5090fdb844c3a58f1f92d9b3588
# Parent  13872c432c3807e0f977d9c1311801179807ece2
xenpaging: handle paged pages in p2m_pod_decrease_reservation

As suggested by <hongkaixing@xxxxxxxxxx>, handle paged pages in PoD code.

Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>

diff -r 13872c432c38 -r b05ede64aaf5 xen/arch/x86/mm/p2m-pod.c
--- a/xen/arch/x86/mm/p2m-pod.c
+++ b/xen/arch/x86/mm/p2m-pod.c
@@ -567,6 +567,21 @@ p2m_pod_decrease_reservation(struct doma
             BUG_ON(p2m->pod.entry_count < 0);
             pod--;
         }
+        else if ( steal_for_cache && p2m_is_paging(t) )
+        {
+            struct page_info *page;
+            /* alloc a new page to compensate the pod list */
+            page = alloc_domheap_page(d, 0);
+            if ( !page )
+                goto out_entry_check;
+            set_p2m_entry(p2m, gpfn + i, _mfn(INVALID_MFN), 0, p2m_invalid, 
p2m->default_access);
+            p2m_mem_paging_drop_page(d, gpfn+i);
+            p2m_pod_cache_add(p2m, page, 0);
+            steal_for_cache =  ( p2m->pod.entry_count > p2m->pod.count );
+            nonpod--;
+            ram--;
+        }
+        /* for other ram types */
         else if ( steal_for_cache && p2m_is_ram(t) )
         {
             struct page_info *page;

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