#ifndef _LINUX_SWAP_H
#define _LINUX_SWAP_H
-#include <linux/config.h>
#include <linux/spinlock.h>
#include <linux/linkage.h>
#include <linux/mmzone.h>
#include <linux/list.h>
#include <linux/sched.h>
+
#include <asm/atomic.h>
#include <asm/page.h>
+struct notifier_block;
+
+struct bio;
+
#define SWAP_FLAG_PREFER 0x8000 /* set if swap priority specified */
#define SWAP_FLAG_PRIO_MASK 0x7fff
#define SWAP_FLAG_PRIO_SHIFT 0
* the type/offset into the pte as 5/27 as well.
*/
#define MAX_SWAPFILES_SHIFT 5
+#ifndef CONFIG_MIGRATION
#define MAX_SWAPFILES (1 << MAX_SWAPFILES_SHIFT)
+#else
+/* Use last two entries for page migration swap entries */
+#define MAX_SWAPFILES ((1 << MAX_SWAPFILES_SHIFT)-2)
+#define SWP_MIGRATION_READ MAX_SWAPFILES
+#define SWP_MIGRATION_WRITE (MAX_SWAPFILES + 1)
+#endif
/*
* Magic header for a swap area. The first part of the union is
char magic[10]; /* SWAP-SPACE or SWAPSPACE2 */
} magic;
struct {
- char bootbits[1024]; /* Space for disklabel etc. */
- unsigned int version;
- unsigned int last_page;
- unsigned int nr_badpages;
- unsigned int padding[125];
- unsigned int badpages[1];
+ char bootbits[1024]; /* Space for disklabel etc. */
+ __u32 version;
+ __u32 last_page;
+ __u32 nr_badpages;
+ unsigned char sws_uuid[16];
+ unsigned char sws_volume[16];
+ __u32 padding[117];
+ __u32 badpages[1];
} info;
};
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),
+ /* add others here before... */
+ SWP_SCANNING = (1 << 8), /* refcount in scan_swap_map */
};
#define SWAP_CLUSTER_MAX 32
/*
* The in-memory structure used to track swap areas.
- * extent_list.prev points at the lowest-index extent. That list is
- * sorted.
*/
struct swap_info_struct {
unsigned int flags;
- spinlock_t sdev_lock;
+ int prio; /* swap priority */
struct file *swap_file;
struct block_device *bdev;
struct list_head extent_list;
- int nr_extents;
struct swap_extent *curr_swap_extent;
unsigned old_block_size;
unsigned short * swap_map;
unsigned int highest_bit;
unsigned int cluster_next;
unsigned int cluster_nr;
- int prio; /* swap priority */
- int pages;
- unsigned long max;
- unsigned long inuse_pages;
+ unsigned int pages;
+ unsigned int max;
+ unsigned int inuse_pages;
int next; /* next entry on swap list */
};
#define vm_swap_full() (nr_swap_pages*2 < total_swap_pages)
/* linux/mm/oom_kill.c */
-extern void out_of_memory(int gfp_mask);
+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 totalhigh_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 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 **, unsigned int, unsigned int);
-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 remove_mapping(struct address_space *mapping, struct page *page);
+extern long vm_total_pages;
+
+#ifdef CONFIG_NUMA
+extern int zone_reclaim_mode;
+extern int sysctl_min_unmapped_ratio;
+extern int sysctl_min_slab_ratio;
+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
+
+extern int kswapd_run(int nid);
#ifdef CONFIG_MMU
/* linux/mm/shmem.c */
/* 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, swp_entry_t, struct page *);
+extern int end_swap_bio_read(struct bio *bio, unsigned int bytes_done, 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 *);
+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);
/* linux/mm/swapfile.c */
extern long total_swap_pages;
extern unsigned int nr_swapfiles;
-extern struct swap_info_struct swap_info[];
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, 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 *);
struct backing_dev_info;
-extern struct swap_list_t swap_list;
-extern spinlock_t swaplock;
-
-#define swap_list_lock() spin_lock(&swaplock)
-#define swap_list_unlock() spin_unlock(&swaplock)
-#define swap_device_lock(p) spin_lock(&p->sdev_lock)
-#define swap_device_unlock(p) spin_unlock(&p->sdev_lock)
+extern spinlock_t swap_lock;
/* linux/mm/thrash.c */
extern struct mm_struct * swap_token_mm;
__put_swap_token(mm);
}
+static inline void disable_swap_token(void)
+{
+ put_swap_token(swap_token_mm);
+}
+
#else /* CONFIG_SWAP */
#define total_swap_pages 0
#define si_swapinfo(val) \
do { (val)->freeswap = (val)->totalswap = 0; } while (0)
+/* only sparc can not include linux/pagemap.h in this file
+ * so leave page_cache_release and release_pages undeclared... */
#define free_page_and_swap_cache(page) \
page_cache_release(page)
#define free_pages_and_swap_cache(pages, nr) \
release_pages((pages), (nr), 0);
-#define show_swap_cache_info() /*NOTHING*/
-#define free_swap_and_cache(swp) /*NOTHING*/
-#define swap_duplicate(swp) /*NOTHING*/
-#define swap_free(swp) /*NOTHING*/
-#define read_swap_cache_async(swp,vma,addr) NULL
-#define lookup_swap_cache(swp) NULL
-#define valid_swaphandles(swp, off) 0
-#define can_share_swap_page(p) 0
-#define move_to_swap_cache(p, swp) 1
-#define move_from_swap_cache(p, i, m) 1
-#define __delete_from_swap_cache(p) /*NOTHING*/
-#define delete_from_swap_cache(p) /*NOTHING*/
+static inline void show_swap_cache_info(void)
+{
+}
+
+static inline void free_swap_and_cache(swp_entry_t swp)
+{
+}
+
+static inline int swap_duplicate(swp_entry_t swp)
+{
+ return 0;
+}
+
+static inline void swap_free(swp_entry_t swp)
+{
+}
+
+static inline struct page *read_swap_cache_async(swp_entry_t swp,
+ struct vm_area_struct *vma, unsigned long addr)
+{
+ return NULL;
+}
+
+static inline struct page *lookup_swap_cache(swp_entry_t swp)
+{
+ return NULL;
+}
+
+static inline int valid_swaphandles(swp_entry_t entry, unsigned long *offset)
+{
+ 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)
+{
+ return 1;
+}
+
+static inline void __delete_from_swap_cache(struct page *page)
+{
+}
+
+static inline void delete_from_swap_cache(struct page *page)
+{
+}
+
+#define swap_token_default_timeout 0
static inline int remove_exclusive_swap_page(struct page *p)
{
#define put_swap_token(x) do { } while(0)
#define grab_swap_token() do { } while(0)
#define has_swap_token(x) 0
+#define disable_swap_token() do { } while(0)
#endif /* CONFIG_SWAP */
#endif /* __KERNEL__*/
git://git.onelab.eu / linux-2.6.git / blobdiff