swapfile.c File Reference

#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/mman.h>
#include <linux/slab.h>
#include <linux/kernel_stat.h>
#include <linux/swap.h>
#include <linux/vmalloc.h>
#include <linux/pagemap.h>
#include <linux/namei.h>
#include <linux/shmem_fs.h>
#include <linux/blkdev.h>
#include <linux/random.h>
#include <linux/writeback.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/ksm.h>
#include <linux/rmap.h>
#include <linux/security.h>
#include <linux/backing-dev.h>
#include <linux/mutex.h>
#include <linux/capability.h>
#include <linux/syscalls.h>
#include <linux/memcontrol.h>
#include <linux/poll.h>
#include <linux/oom.h>
#include <linux/frontswap.h>
#include <linux/swapfile.h>
#include <linux/export.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <linux/swapops.h>
#include <linux/page_cgroup.h>

Go to the source code of this file.

Macros
#define	SWAPFILE_CLUSTER   256
#define	LATENCY_LIMIT   256

Functions
	DEFINE_SPINLOCK (swap_lock)
swp_entry_t	get_swap_page (void)
swp_entry_t	get_swap_page_of_type (int type)
void	swap_free (swp_entry_t entry)
void	swapcache_free (swp_entry_t entry, struct page *page)
int	page_swapcount (struct page *page)
int	reuse_swap_page (struct page *page)
int	try_to_free_swap (struct page *page)
int	free_swap_and_cache (swp_entry_t entry)
int	try_to_unuse (unsigned int type, bool frontswap, unsigned long pages_to_unuse)
sector_t	map_swap_page (struct page *page, struct block_device **bdev)
int	add_swap_extent (struct swap_info_struct *sis, unsigned long start_page, unsigned long nr_pages, sector_t start_block)
	SYSCALL_DEFINE1 (swapoff, const char __user *, specialfile)
	SYSCALL_DEFINE2 (swapon, const char __user *, specialfile, int, swap_flags)
void	si_swapinfo (struct sysinfo *val)
void	swap_shmem_alloc (swp_entry_t entry)
int	swap_duplicate (swp_entry_t entry)
int	swapcache_prepare (swp_entry_t entry)
struct swap_info_struct *	page_swap_info (struct page *page)
struct address_space *	__page_file_mapping (struct page *page)
	EXPORT_SYMBOL_GPL (__page_file_mapping)
pgoff_t	__page_file_index (struct page *page)
	EXPORT_SYMBOL_GPL (__page_file_index)
int	add_swap_count_continuation (swp_entry_t entry, gfp_t gfp_mask)

Variables
long	nr_swap_pages
long	total_swap_pages
struct swap_list_t	swap_list = {-1, -1}
struct swap_info_struct *	swap_info [MAX_SWAPFILES]

Macro Definition Documentation

#define LATENCY_LIMIT   256

Definition at line 183 of file swapfile.c.

#define SWAPFILE_CLUSTER   256

Definition at line 182 of file swapfile.c.

Function Documentation

pgoff_t __page_file_index

(

struct page *

page

)

Definition at line 2244 of file swapfile.c.

struct address_space* __page_file_mapping ( struct page *  page )

read

Definition at line 2237 of file swapfile.c.

int add_swap_count_continuation	(	swp_entry_t	entry,
		gfp_t	gfp_mask
	)

Definition at line 2267 of file swapfile.c.

int add_swap_extent	(	struct swap_info_struct *	sis,
		unsigned long	start_page,
		unsigned long	nr_pages,
		sector_t	start_block
	)

Definition at line 1350 of file swapfile.c.

DEFINE_SPINLOCK

(

swap_lock

)

EXPORT_SYMBOL_GPL

(

__page_file_mapping

)

EXPORT_SYMBOL_GPL

(

__page_file_index

)

int free_swap_and_cache

(

swp_entry_t

entry

)

Definition at line 691 of file swapfile.c.

swp_entry_t get_swap_page

(

void

)

Definition at line 414 of file swapfile.c.

swp_entry_t get_swap_page_of_type

(

int

type

)

Definition at line 457 of file swapfile.c.

sector_t map_swap_page	(	struct page *	page,
		struct block_device **	bdev
	)

Definition at line 1313 of file swapfile.c.

struct swap_info_struct* page_swap_info ( struct page *  page )

read

Definition at line 2227 of file swapfile.c.

int page_swapcount

(

struct page *

page

)

Definition at line 610 of file swapfile.c.

int reuse_swap_page

(

struct page *

page

)

Definition at line 631 of file swapfile.c.

void si_swapinfo

(

struct sysinfo *

val

)

Definition at line 2100 of file swapfile.c.

int swap_duplicate

(

swp_entry_t

entry

)

Definition at line 2205 of file swapfile.c.

void swap_free

(

swp_entry_t

entry

)

Definition at line 577 of file swapfile.c.

void swap_shmem_alloc

(

swp_entry_t

entry

)

Definition at line 2193 of file swapfile.c.

void swapcache_free	(	swp_entry_t	entry,
		struct page *	page
	)

Definition at line 591 of file swapfile.c.

int swapcache_prepare

(

swp_entry_t

entry

)

Definition at line 2222 of file swapfile.c.

SYSCALL_DEFINE1	(	swapoff	,
		const char __user *	,
		specialfile
	)

Definition at line 1479 of file swapfile.c.

SYSCALL_DEFINE2	(	swapon	,
		const char __user *	,
		specialfile	,
		int	,
		swap_flags
	)

Definition at line 1935 of file swapfile.c.

int try_to_free_swap

(

struct page *

page

)

Definition at line 653 of file swapfile.c.

int try_to_unuse	(	unsigned int	type,
		bool	frontswap,
		unsigned long	pages_to_unuse
	)

Definition at line 1045 of file swapfile.c.

Variable Documentation

long nr_swap_pages

Definition at line 50 of file swapfile.c.

struct swap_info_struct* swap_info[MAX_SWAPFILES]

Definition at line 61 of file swapfile.c.

struct swap_list_t swap_list = {-1, -1}

Definition at line 59 of file swapfile.c.

long total_swap_pages

Definition at line 51 of file swapfile.c.