mm: migrate: Account a transhuge page properly when rate limiting

[deliverable/linux.git] / include / linux / mm.h

diff --git a/include/linux/mm.h b/include/linux/mm.h
index d04c2f0aab363bb988f0d8fb64bfe6402f604583..d87f9ec4a145aedd4bc119a25ac998be3b8f6d7e 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -693,6 +693,36 @@ static inline int page_to_nid(const struct page *page)
 }
 #endif
 
+#ifdef CONFIG_NUMA_BALANCING
+static inline int page_xchg_last_nid(struct page *page, int nid)
+{
+       return xchg(&page->_last_nid, nid);
+}
+
+static inline int page_last_nid(struct page *page)
+{
+       return page->_last_nid;
+}
+static inline void reset_page_last_nid(struct page *page)
+{
+       page->_last_nid = -1;
+}
+#else
+static inline int page_xchg_last_nid(struct page *page, int nid)
+{
+       return page_to_nid(page);
+}
+
+static inline int page_last_nid(struct page *page)
+{
+       return page_to_nid(page);
+}
+
+static inline void reset_page_last_nid(struct page *page)
+{
+}
+#endif
+
 static inline struct zone *page_zone(const struct page *page)
 {
        return &NODE_DATA(page_to_nid(page))->node_zones[page_zonenum(page)];