shmem_fs.h File Reference

#include <linux/swap.h>
#include <linux/mempolicy.h>
#include <linux/pagemap.h>
#include <linux/percpu_counter.h>
#include <linux/xattr.h>

Go to the source code of this file.

Data Structures
struct	shmem_inode_info
struct	shmem_sb_info

Functions
int	shmem_init (void)
int	shmem_fill_super (struct super_block *sb, void *data, int silent)
struct file *	shmem_file_setup (const char *name, loff_t size, unsigned long flags)
int	shmem_zero_setup (struct vm_area_struct *)
int	shmem_lock (struct file *file, int lock, struct user_struct *user)
void	shmem_unlock_mapping (struct address_space *mapping)
struct page *	shmem_read_mapping_page_gfp (struct address_space *mapping, pgoff_t index, gfp_t gfp_mask)
void	shmem_truncate_range (struct inode *inode, loff_t start, loff_t end)
int	shmem_unuse (swp_entry_t entry, struct page *page)

Function Documentation

struct file* shmem_file_setup ( const char *  name, loff_t  size, unsigned long  flags  )

read

Definition at line 2784 of file shmem.c.

int shmem_fill_super	(	struct super_block *	sb,
		void *	data,
		int	silent
	)

int shmem_init

(

void

)

Definition at line 2738 of file shmem.c.

int shmem_lock	(	struct file *	file,
		int	lock,
		struct user_struct *	user
	)

Definition at line 2753 of file shmem.c.

struct page* shmem_read_mapping_page_gfp ( struct address_space *  mapping, pgoff_t  index, gfp_t  gfp  )

read

shmem_read_mapping_page_gfp - read into page cache, using specified page allocation flags. : the page's address_space : the page index : the page allocator flags to use if allocating

This behaves as a tmpfs "read_cache_page_gfp(mapping, index, gfp)", with any new page allocations done using the specified allocation flags. But read_cache_page_gfp() uses the ->readpage() method: which does not suit tmpfs, since it may have pages in swapcache, and needs to find those for itself; although drivers/gpu/drm i915 and ttm rely upon this support.

i915_gem_object_get_pages_gtt() mixes __GFP_NORETRY | __GFP_NOWARN in with the mapping_gfp_mask(), to avoid OOMing the machine unnecessarily.

Definition at line 2877 of file shmem.c.

void shmem_truncate_range	(	struct inode *	inode,
		loff_t	start,
		loff_t	end
	)

Definition at line 2762 of file shmem.c.

void shmem_unlock_mapping

(

struct address_space *

mapping

)

Definition at line 2758 of file shmem.c.

int shmem_unuse	(	swp_entry_t	entry,
		struct page *	page
	)

Definition at line 2748 of file shmem.c.

int shmem_zero_setup

(

struct vm_area_struct *

vma

)

shmem_zero_setup - setup a shared anonymous mapping : the vma to be mmapped is prepared by do_mmap_pgoff

Definition at line 2846 of file shmem.c.