Ok. So I added the following patch:
---
include/linux/mmu_notifier.h | 1 +
mm/mmu_notifier.c | 12 ++++++++++++
2 files changed, 13 insertions(+)
Index: linux-2.6/include/linux/mmu_notifier.h
===================================================================
--- linux-2.6.orig/include/linux/mmu_notifier.h 2008-01-30 11:09:06.000000000
-0800
+++ linux-2.6/include/linux/mmu_notifier.h 2008-01-30 11:10:38.000000000
-0800
@@ -146,6 +146,7 @@ static inline void mmu_notifier_head_ini
extern void mmu_rmap_notifier_register(struct mmu_rmap_notifier *mrn);
extern void mmu_rmap_notifier_unregister(struct mmu_rmap_notifier *mrn);
+extern void mmu_rmap_export_page(struct page *page);
extern struct hlist_head mmu_rmap_notifier_list;
Index: linux-2.6/mm/mmu_notifier.c
===================================================================
--- linux-2.6.orig/mm/mmu_notifier.c 2008-01-30 11:09:01.000000000 -0800
+++ linux-2.6/mm/mmu_notifier.c 2008-01-30 11:12:10.000000000 -0800
@@ -99,3 +99,15 @@ void mmu_rmap_notifier_unregister(struct
}
EXPORT_SYMBOL(mmu_rmap_notifier_unregister);
+/*
+ * Export a page.
+ *
+ * Pagelock must be held.
+ * Must be called before a page is put on an external rmap.
+ */
+void mmu_rmap_export_page(struct page *page)
+{
+ BUG_ON(!PageLocked(page));
+ SetPageExternalRmap(page);
+}
+EXPORT_SYMBOL(mmu_rmap_export_page);
--
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