---

yaml
---
r: 54245
b: refs/heads/master
c: 906e0be
h: refs/heads/master
i:
  54243: a10ed6b
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4ab688c51226188f2d4ad4f789032c107944ef89
+refs/heads/master: 906e0be197232c219197d058ef5095baa7764cd4

trunk/include/linux/migrate.h

@@ -2,18 +2,29 @@
 #define _LINUX_MIGRATE_H
 
 #include <linux/mm.h>
+#include <linux/mempolicy.h>
+#include <linux/pagemap.h>
 
 typedef struct page *new_page_t(struct page *, unsigned long private, int **);
 
+#ifdef CONFIG_MIGRATION
 /* Check if a vma is migratable */
 static inline int vma_migratable(struct vm_area_struct *vma)
 {
 	if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED))
 		return 0;
+	/*
+	 * Migration allocates pages in the highest zone. If we cannot
+	 * do so then migration (at least from node to node) is not
+	 * possible.
+	 */
+	if (vma->vm_file &&
+		gfp_zone(mapping_gfp_mask(vma->vm_file->f_mapping))
+								< policy_zone)
+			return 0;
 	return 1;
 }
 
-#ifdef CONFIG_MIGRATION
 extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
 extern int putback_lru_pages(struct list_head *l);
 extern int migrate_page(struct address_space *,
@@ -28,6 +39,8 @@ extern int migrate_vmas(struct mm_struct *mm,
 		const nodemask_t *from, const nodemask_t *to,
 		unsigned long flags);
 #else
+static inline int vma_migratable(struct vm_area_struct *vma)
+					{ return 0; }
 
 static inline int isolate_lru_page(struct page *p, struct list_head *list)
 					{ return -ENOSYS; }