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Diffstat (limited to 'include/linux/swap.h')
-rw-r--r--include/linux/swap.h88
1 files changed, 53 insertions, 35 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h
index f2eb1893e..d18b65c53 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -287,9 +287,7 @@ static inline void workingset_node_shadows_dec(struct radix_tree_node *node)
/* linux/mm/page_alloc.c */
extern unsigned long totalram_pages;
extern unsigned long totalreserve_pages;
-extern unsigned long dirty_balance_reserve;
extern unsigned long nr_free_buffer_pages(void);
-extern unsigned long nr_unallocated_buffer_pages(void);
extern unsigned long nr_free_pagecache_pages(void);
/* Definition of global_page_state not available yet */
@@ -309,6 +307,7 @@ extern void lru_add_drain_cpu(int cpu);
extern void lru_add_drain_all(void);
extern void rotate_reclaimable_page(struct page *page);
extern void deactivate_file_page(struct page *page);
+extern void deactivate_page(struct page *page);
extern void swap_setup(void);
extern void add_page_to_unevictable_list(struct page *page);
@@ -329,8 +328,6 @@ extern unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
struct zone *zone,
unsigned long *nr_scanned);
extern unsigned long shrink_all_memory(unsigned long nr_pages);
-extern unsigned long shrink_memory_mask(unsigned long nr_to_reclaim,
- gfp_t mask);
extern int vm_swappiness;
extern int remove_mapping(struct address_space *mapping, struct page *page);
extern unsigned long vm_total_pages;
@@ -353,33 +350,7 @@ extern void check_move_unevictable_pages(struct page **, int nr_pages);
extern int kswapd_run(int nid);
extern void kswapd_stop(int nid);
-#ifdef CONFIG_MEMCG
-static inline int mem_cgroup_swappiness(struct mem_cgroup *memcg)
-{
- /* root ? */
- if (mem_cgroup_disabled() || !memcg->css.parent)
- return vm_swappiness;
-
- return memcg->swappiness;
-}
-#else
-static inline int mem_cgroup_swappiness(struct mem_cgroup *mem)
-{
- return vm_swappiness;
-}
-#endif
-#ifdef CONFIG_MEMCG_SWAP
-extern void mem_cgroup_swapout(struct page *page, swp_entry_t entry);
-extern void mem_cgroup_uncharge_swap(swp_entry_t entry);
-#else
-static inline void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
-{
-}
-static inline void mem_cgroup_uncharge_swap(swp_entry_t entry)
-{
-}
-#endif
#ifdef CONFIG_SWAP
/* linux/mm/page_io.c */
extern int swap_readpage(struct page *);
@@ -442,18 +413,14 @@ extern void swapcache_free(swp_entry_t);
extern int free_swap_and_cache(swp_entry_t);
extern int swap_type_of(dev_t, sector_t, struct block_device **);
extern unsigned int count_swap_pages(int, int);
-extern sector_t map_swap_entry(swp_entry_t entry, struct block_device **);
extern sector_t map_swap_page(struct page *, struct block_device **);
extern sector_t swapdev_block(int, pgoff_t);
-extern struct swap_info_struct *get_swap_info_struct(unsigned);
extern int page_swapcount(struct page *);
extern int swp_swapcount(swp_entry_t entry);
extern struct swap_info_struct *page_swap_info(struct page *);
extern int reuse_swap_page(struct page *);
extern int try_to_free_swap(struct page *);
struct backing_dev_info;
-extern void get_swap_range_of_type(int type, swp_entry_t *start,
- swp_entry_t *end, unsigned int limit);
#else /* CONFIG_SWAP */
@@ -546,7 +513,8 @@ static inline int swp_swapcount(swp_entry_t entry)
return 0;
}
-#define reuse_swap_page(page) (page_mapcount(page) == 1)
+#define reuse_swap_page(page) \
+ (!PageTransCompound(page) && page_mapcount(page) == 1)
static inline int try_to_free_swap(struct page *page)
{
@@ -561,5 +529,55 @@ static inline swp_entry_t get_swap_page(void)
}
#endif /* CONFIG_SWAP */
+
+#ifdef CONFIG_MEMCG
+static inline int mem_cgroup_swappiness(struct mem_cgroup *memcg)
+{
+ /* root ? */
+ if (mem_cgroup_disabled() || !memcg->css.parent)
+ return vm_swappiness;
+
+ return memcg->swappiness;
+}
+
+#else
+static inline int mem_cgroup_swappiness(struct mem_cgroup *mem)
+{
+ return vm_swappiness;
+}
+#endif
+
+#ifdef CONFIG_MEMCG_SWAP
+extern void mem_cgroup_swapout(struct page *page, swp_entry_t entry);
+extern int mem_cgroup_try_charge_swap(struct page *page, swp_entry_t entry);
+extern void mem_cgroup_uncharge_swap(swp_entry_t entry);
+extern long mem_cgroup_get_nr_swap_pages(struct mem_cgroup *memcg);
+extern bool mem_cgroup_swap_full(struct page *page);
+#else
+static inline void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
+{
+}
+
+static inline int mem_cgroup_try_charge_swap(struct page *page,
+ swp_entry_t entry)
+{
+ return 0;
+}
+
+static inline void mem_cgroup_uncharge_swap(swp_entry_t entry)
+{
+}
+
+static inline long mem_cgroup_get_nr_swap_pages(struct mem_cgroup *memcg)
+{
+ return get_nr_swap_pages();
+}
+
+static inline bool mem_cgroup_swap_full(struct page *page)
+{
+ return vm_swap_full();
+}
+#endif
+
#endif /* __KERNEL__*/
#endif /* _LINUX_SWAP_H */