X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=mm%2Fmempolicy.c;h=83c69f8a64c29dd0878050b3912e5f0c2b1af3ac;hb=74ff305b05b0974b30022a48145075e6d9a7fb2b;hp=c1592a94582f8c2950a6a4cf34711f02a35066c6;hpb=1212663fba7c5e003e05d24f043d5ed57eb18b24;p=cascardo%2Flinux.git

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index c1592a94582f..83c69f8a64c2 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -722,12 +722,29 @@ out:
 
 }
 
+/*
+ * Allocate a new page for page migration based on vma policy.
+ * Start assuming that page is mapped by vma pointed to by @private.
+ * Search forward from there, if not.  N.B., this assumes that the
+ * list of pages handed to migrate_pages()--which is how we get here--
+ * is in virtual address order.
+ */
 static struct page *new_vma_page(struct page *page, unsigned long private, int **x)
 {
 	struct vm_area_struct *vma = (struct vm_area_struct *)private;
+	unsigned long uninitialized_var(address);
 
-	return alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma,
-					page_address_in_vma(page, vma));
+	while (vma) {
+		address = page_address_in_vma(page, vma);
+		if (address != -EFAULT)
+			break;
+		vma = vma->vm_next;
+	}
+
+	/*
+	 * if !vma, alloc_page_vma() will use task or system default policy
+	 */
+	return alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, address);
 }
 #else