[PATCH] page migration reorg

[linux-2.6] / include / linux / swap.h

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 117add066f00d186ce7435167526ef8877245a23..12415dd94451cef5caf8efcdb39bb458bb05f921 100644 (file)
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -147,7 +147,7 @@ struct swap_list_t {
 #define vm_swap_full() (nr_swap_pages*2 < total_swap_pages)
 
 /* linux/mm/oom_kill.c */
-extern void out_of_memory(gfp_t gfp_mask, int order);
+extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order);
 
 /* linux/mm/memory.c */
 extern void swapin_readahead(swp_entry_t, unsigned long, struct vm_area_struct *);
@@ -167,19 +167,40 @@ extern void FASTCALL(lru_cache_add_active(struct page *));
 extern void FASTCALL(activate_page(struct page *));
 extern void FASTCALL(mark_page_accessed(struct page *));
 extern void lru_add_drain(void);
+extern int lru_add_drain_all(void);
 extern int rotate_reclaimable_page(struct page *page);
 extern void swap_setup(void);
 
 /* linux/mm/vmscan.c */
-extern int try_to_free_pages(struct zone **, gfp_t);
-extern int shrink_all_memory(int);
+extern unsigned long try_to_free_pages(struct zone **, gfp_t);
+extern unsigned long shrink_all_memory(unsigned long nr_pages);
 extern int vm_swappiness;
-
-extern int isolate_lru_page(struct page *p);
-extern int putback_lru_pages(struct list_head *l);
-
-#ifdef CONFIG_MIGRATION
-extern int migrate_pages(struct list_head *l, struct list_head *t);
+extern int remove_mapping(struct address_space *mapping, struct page *page);
+
+/* possible outcome of pageout() */
+typedef enum {
+       /* failed to write page out, page is locked */
+       PAGE_KEEP,
+       /* move page to the active list, page is locked */
+       PAGE_ACTIVATE,
+       /* page has been sent to the disk successfully, page is unlocked */
+       PAGE_SUCCESS,
+       /* page is clean and locked */
+       PAGE_CLEAN,
+} pageout_t;
+
+extern pageout_t pageout(struct page *page, struct address_space *mapping);
+
+#ifdef CONFIG_NUMA
+extern int zone_reclaim_mode;
+extern int zone_reclaim_interval;
+extern int zone_reclaim(struct zone *, gfp_t, unsigned int);
+#else
+#define zone_reclaim_mode 0
+static inline int zone_reclaim(struct zone *z, gfp_t mask, unsigned int order)
+{
+       return 0;
+}
 #endif
 
 #ifdef CONFIG_MMU
@@ -199,7 +220,7 @@ extern int rw_swap_page_sync(int, swp_entry_t, struct page *);
 extern struct address_space swapper_space;
 #define total_swapcache_pages  swapper_space.nrpages
 extern void show_swap_cache_info(void);
-extern int add_to_swap(struct page *);
+extern int add_to_swap(struct page *, gfp_t);
 extern void __delete_from_swap_cache(struct page *);
 extern void delete_from_swap_cache(struct page *);
 extern int move_to_swap_cache(struct page *, swp_entry_t);
@@ -228,6 +249,7 @@ extern int remove_exclusive_swap_page(struct page *);
 struct backing_dev_info;
 
 extern spinlock_t swap_lock;
+extern int remove_vma_swap(struct vm_area_struct *vma, struct page *page);
 
 /* linux/mm/thrash.c */
 extern struct mm_struct * swap_token_mm;