#include <linux/linkage.h>
#include <linux/mmzone.h>
#include <linux/list.h>
+#include <linux/memcontrol.h>
#include <linux/sched.h>
+#include <linux/node.h>
#include <asm/atomic.h>
#include <asm/page.h>
enum {
SWP_USED = (1 << 0), /* is slot in swap_info[] used? */
SWP_WRITEOK = (1 << 1), /* ok to write to this swap? */
- SWP_ACTIVE = (SWP_USED | SWP_WRITEOK),
+ SWP_DISCARDABLE = (1 << 2), /* blkdev supports discard */
+ SWP_DISCARDING = (1 << 3), /* now discarding a free cluster */
+ SWP_SOLIDSTATE = (1 << 4), /* blkdev seeks are cheap */
/* add others here before... */
SWP_SCANNING = (1 << 8), /* refcount in scan_swap_map */
};
* The in-memory structure used to track swap areas.
*/
struct swap_info_struct {
- unsigned int flags;
+ unsigned long flags;
int prio; /* swap priority */
+ int next; /* next entry on swap list */
struct file *swap_file;
struct block_device *bdev;
struct list_head extent_list;
struct swap_extent *curr_swap_extent;
- unsigned old_block_size;
- unsigned short * swap_map;
+ unsigned short *swap_map;
unsigned int lowest_bit;
unsigned int highest_bit;
+ unsigned int lowest_alloc; /* while preparing discard cluster */
+ unsigned int highest_alloc; /* while preparing discard cluster */
unsigned int cluster_next;
unsigned int cluster_nr;
unsigned int pages;
unsigned int max;
unsigned int inuse_pages;
- int next; /* next entry on swap list */
+ unsigned int old_block_size;
};
struct swap_list_t {
/* Swap 50% full? Release swapcache more aggressively.. */
#define vm_swap_full() (nr_swap_pages*2 < total_swap_pages)
-/* linux/mm/oom_kill.c */
-extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order);
-extern int register_oom_notifier(struct notifier_block *nb);
-extern int unregister_oom_notifier(struct notifier_block *nb);
-
-/* linux/mm/memory.c */
-extern void swapin_readahead(swp_entry_t, unsigned long, struct vm_area_struct *);
-
/* linux/mm/page_alloc.c */
extern unsigned long totalram_pages;
extern unsigned long totalreserve_pages;
-extern long nr_swap_pages;
-extern unsigned int nr_free_pages(void);
-extern unsigned int nr_free_pages_pgdat(pg_data_t *pgdat);
extern unsigned int nr_free_buffer_pages(void);
extern unsigned int nr_free_pagecache_pages(void);
+/* Definition of global_page_state not available yet */
+#define nr_free_pages() global_page_state(NR_FREE_PAGES)
+
+
/* linux/mm/swap.c */
-extern void FASTCALL(lru_cache_add(struct page *));
-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_cache_add(struct page *, enum lru_list lru);
+extern void lru_cache_add_lru(struct page *, enum lru_list lru);
+extern void activate_page(struct page *);
+extern void 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 rotate_reclaimable_page(struct page *page);
extern void swap_setup(void);
+extern void add_page_to_unevictable_list(struct page *page);
+
+/**
+ * lru_cache_add: add a page to the page lists
+ * @page: the page to add
+ */
+static inline void lru_cache_add_anon(struct page *page)
+{
+ __lru_cache_add(page, LRU_INACTIVE_ANON);
+}
+
+static inline void lru_cache_add_active_anon(struct page *page)
+{
+ __lru_cache_add(page, LRU_ACTIVE_ANON);
+}
+
+static inline void lru_cache_add_file(struct page *page)
+{
+ __lru_cache_add(page, LRU_INACTIVE_FILE);
+}
+
+static inline void lru_cache_add_active_file(struct page *page)
+{
+ __lru_cache_add(page, LRU_ACTIVE_FILE);
+}
+
/* linux/mm/vmscan.c */
-extern unsigned long try_to_free_pages(struct zone **, gfp_t);
+extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
+ gfp_t gfp_mask, nodemask_t *mask);
+extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem,
+ gfp_t gfp_mask, bool noswap,
+ unsigned int swappiness);
+extern int __isolate_lru_page(struct page *page, int mode, int file);
extern unsigned long shrink_all_memory(unsigned long nr_pages);
extern int vm_swappiness;
extern int remove_mapping(struct address_space *mapping, struct page *page);
}
#endif
+#ifdef CONFIG_UNEVICTABLE_LRU
+extern int page_evictable(struct page *page, struct vm_area_struct *vma);
+extern void scan_mapping_unevictable_pages(struct address_space *);
+
+extern unsigned long scan_unevictable_pages;
+extern int scan_unevictable_handler(struct ctl_table *, int, struct file *,
+ void __user *, size_t *, loff_t *);
+extern int scan_unevictable_register_node(struct node *node);
+extern void scan_unevictable_unregister_node(struct node *node);
+#else
+static inline int page_evictable(struct page *page,
+ struct vm_area_struct *vma)
+{
+ return 1;
+}
+
+static inline void scan_mapping_unevictable_pages(struct address_space *mapping)
+{
+}
+
+static inline int scan_unevictable_register_node(struct node *node)
+{
+ return 0;
+}
+
+static inline void scan_unevictable_unregister_node(struct node *node) { }
+#endif
+
extern int kswapd_run(int nid);
#ifdef CONFIG_MMU
/* linux/mm/page_io.c */
extern int swap_readpage(struct file *, struct page *);
extern int swap_writepage(struct page *page, struct writeback_control *wbc);
-extern int rw_swap_page_sync(int rw, swp_entry_t entry, struct page *page,
- struct bio **bio_chain);
-extern int end_swap_bio_read(struct bio *bio, unsigned int bytes_done, int err);
+extern void end_swap_bio_read(struct bio *bio, int err);
/* linux/mm/swap_state.c */
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 *, gfp_t);
+extern int add_to_swap(struct page *);
+extern int add_to_swap_cache(struct page *, swp_entry_t, 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);
-extern int move_from_swap_cache(struct page *, unsigned long,
- struct address_space *);
extern void free_page_and_swap_cache(struct page *);
extern void free_pages_and_swap_cache(struct page **, int);
-extern struct page * lookup_swap_cache(swp_entry_t);
-extern struct page * read_swap_cache_async(swp_entry_t, struct vm_area_struct *vma,
- unsigned long addr);
+extern struct page *lookup_swap_cache(swp_entry_t);
+extern struct page *read_swap_cache_async(swp_entry_t, gfp_t,
+ struct vm_area_struct *vma, unsigned long addr);
+extern struct page *swapin_readahead(swp_entry_t, gfp_t,
+ struct vm_area_struct *vma, unsigned long addr);
+
/* linux/mm/swapfile.c */
+extern long nr_swap_pages;
extern long total_swap_pages;
-extern unsigned int nr_swapfiles;
extern void si_swapinfo(struct sysinfo *);
extern swp_entry_t get_swap_page(void);
extern swp_entry_t get_swap_page_of_type(int);
extern int swap_duplicate(swp_entry_t);
extern int valid_swaphandles(swp_entry_t, unsigned long *);
extern void swap_free(swp_entry_t);
-extern void free_swap_and_cache(swp_entry_t);
-extern int swap_type_of(dev_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_page(struct swap_info_struct *, pgoff_t);
+extern sector_t swapdev_block(int, pgoff_t);
extern struct swap_info_struct *get_swap_info_struct(unsigned);
-extern int can_share_swap_page(struct page *);
-extern int remove_exclusive_swap_page(struct page *);
+extern int reuse_swap_page(struct page *);
+extern int try_to_free_swap(struct page *);
struct backing_dev_info;
-extern spinlock_t swap_lock;
-
/* linux/mm/thrash.c */
extern struct mm_struct * swap_token_mm;
extern void grab_swap_token(void);
put_swap_token(swap_token_mm);
}
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR
+extern void mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent);
+#else
+static inline void
+mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent)
+{
+}
+#endif
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
+extern void mem_cgroup_uncharge_swap(swp_entry_t ent);
+#else
+static inline void mem_cgroup_uncharge_swap(swp_entry_t ent)
+{
+}
+#endif
+
#else /* CONFIG_SWAP */
-#define total_swap_pages 0
+#define nr_swap_pages 0L
+#define total_swap_pages 0L
#define total_swapcache_pages 0UL
#define si_swapinfo(val) \
{
}
-static inline void free_swap_and_cache(swp_entry_t swp)
-{
-}
-
-static inline int swap_duplicate(swp_entry_t swp)
-{
- return 0;
-}
+#define free_swap_and_cache(swp) is_migration_entry(swp)
+#define swap_duplicate(swp) is_migration_entry(swp)
static inline void swap_free(swp_entry_t swp)
{
}
-static inline struct page *read_swap_cache_async(swp_entry_t swp,
+static inline struct page *swapin_readahead(swp_entry_t swp, gfp_t gfp_mask,
struct vm_area_struct *vma, unsigned long addr)
{
return NULL;
return NULL;
}
-static inline int valid_swaphandles(swp_entry_t entry, unsigned long *offset)
+static inline int add_to_swap(struct page *page)
{
return 0;
}
-#define can_share_swap_page(p) (page_mapcount(p) == 1)
-
-static inline int move_to_swap_cache(struct page *page, swp_entry_t entry)
-{
- return 1;
-}
-
-static inline int move_from_swap_cache(struct page *page, unsigned long index,
- struct address_space *mapping)
+static inline int add_to_swap_cache(struct page *page, swp_entry_t entry,
+ gfp_t gfp_mask)
{
- return 1;
+ return -1;
}
static inline void __delete_from_swap_cache(struct page *page)
{
}
-#define swap_token_default_timeout 0
+#define reuse_swap_page(page) (page_mapcount(page) == 1)
-static inline int remove_exclusive_swap_page(struct page *p)
+static inline int try_to_free_swap(struct page *page)
{
return 0;
}
#define has_swap_token(x) 0
#define disable_swap_token() do { } while(0)
+static inline int mem_cgroup_cache_charge_swapin(struct page *page,
+ struct mm_struct *mm, gfp_t mask, bool locked)
+{
+ return 0;
+}
+
#endif /* CONFIG_SWAP */
#endif /* __KERNEL__*/
#endif /* _LINUX_SWAP_H */
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