diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/writeback.h')
-rw-r--r-- | ANDROID_3.4.5/include/linux/writeback.h | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/ANDROID_3.4.5/include/linux/writeback.h b/ANDROID_3.4.5/include/linux/writeback.h deleted file mode 100644 index a2b84f59..00000000 --- a/ANDROID_3.4.5/include/linux/writeback.h +++ /dev/null @@ -1,201 +0,0 @@ -/* - * include/linux/writeback.h - */ -#ifndef WRITEBACK_H -#define WRITEBACK_H - -#include <linux/sched.h> -#include <linux/fs.h> - -DECLARE_PER_CPU(int, dirty_throttle_leaks); - -/* - * The 1/4 region under the global dirty thresh is for smooth dirty throttling: - * - * (thresh - thresh/DIRTY_FULL_SCOPE, thresh) - * - * Further beyond, all dirtier tasks will enter a loop waiting (possibly long - * time) for the dirty pages to drop, unless written enough pages. - * - * The global dirty threshold is normally equal to the global dirty limit, - * except when the system suddenly allocates a lot of anonymous memory and - * knocks down the global dirty threshold quickly, in which case the global - * dirty limit will follow down slowly to prevent livelocking all dirtier tasks. - */ -#define DIRTY_SCOPE 8 -#define DIRTY_FULL_SCOPE (DIRTY_SCOPE / 2) - -struct backing_dev_info; - -/* - * fs/fs-writeback.c - */ -enum writeback_sync_modes { - WB_SYNC_NONE, /* Don't wait on anything */ - WB_SYNC_ALL, /* Wait on every mapping */ -}; - -/* - * why some writeback work was initiated - */ -enum wb_reason { - WB_REASON_BACKGROUND, - WB_REASON_TRY_TO_FREE_PAGES, - WB_REASON_SYNC, - WB_REASON_PERIODIC, - WB_REASON_LAPTOP_TIMER, - WB_REASON_FREE_MORE_MEM, - WB_REASON_FS_FREE_SPACE, - WB_REASON_FORKER_THREAD, - - WB_REASON_MAX, -}; -extern const char *wb_reason_name[]; - -/* - * A control structure which tells the writeback code what to do. These are - * always on the stack, and hence need no locking. They are always initialised - * in a manner such that unspecified fields are set to zero. - */ -struct writeback_control { - enum writeback_sync_modes sync_mode; - long nr_to_write; /* Write this many pages, and decrement - this for each page written */ - long pages_skipped; /* Pages which were not written */ - - /* - * For a_ops->writepages(): if start or end are non-zero then this is - * a hint that the filesystem need only write out the pages inside that - * byterange. The byte at `end' is included in the writeout request. - */ - loff_t range_start; - loff_t range_end; - - unsigned for_kupdate:1; /* A kupdate writeback */ - unsigned for_background:1; /* A background writeback */ - unsigned tagged_writepages:1; /* tag-and-write to avoid livelock */ - unsigned for_reclaim:1; /* Invoked from the page allocator */ - unsigned range_cyclic:1; /* range_start is cyclic */ -}; - -/* - * fs/fs-writeback.c - */ -struct bdi_writeback; -int inode_wait(void *); -void writeback_inodes_sb(struct super_block *, enum wb_reason reason); -void writeback_inodes_sb_nr(struct super_block *, unsigned long nr, - enum wb_reason reason); -int writeback_inodes_sb_if_idle(struct super_block *, enum wb_reason reason); -int writeback_inodes_sb_nr_if_idle(struct super_block *, unsigned long nr, - enum wb_reason reason); -void sync_inodes_sb(struct super_block *); -long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages, - enum wb_reason reason); -long wb_do_writeback(struct bdi_writeback *wb, int force_wait); -void wakeup_flusher_threads(long nr_pages, enum wb_reason reason); - -/* writeback.h requires fs.h; it, too, is not included from here. */ -static inline void wait_on_inode(struct inode *inode) -{ - might_sleep(); - wait_on_bit(&inode->i_state, __I_NEW, inode_wait, TASK_UNINTERRUPTIBLE); -} -static inline void inode_sync_wait(struct inode *inode) -{ - might_sleep(); - wait_on_bit(&inode->i_state, __I_SYNC, inode_wait, - TASK_UNINTERRUPTIBLE); -} - - -/* - * mm/page-writeback.c - */ -#ifdef CONFIG_BLOCK -void laptop_io_completion(struct backing_dev_info *info); -void laptop_sync_completion(void); -void laptop_mode_sync(struct work_struct *work); -void laptop_mode_timer_fn(unsigned long data); -#else -static inline void laptop_sync_completion(void) { } -#endif -void throttle_vm_writeout(gfp_t gfp_mask); -bool zone_dirty_ok(struct zone *zone); - -extern unsigned long global_dirty_limit; - -/* These are exported to sysctl. */ -extern int dirty_background_ratio; -extern unsigned long dirty_background_bytes; -extern int vm_dirty_ratio; -extern unsigned long vm_dirty_bytes; -extern unsigned int dirty_writeback_interval; -extern unsigned int dirty_expire_interval; -extern int vm_highmem_is_dirtyable; -extern int block_dump; -extern int laptop_mode; - -extern int dirty_background_ratio_handler(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, - loff_t *ppos); -extern int dirty_background_bytes_handler(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, - loff_t *ppos); -extern int dirty_ratio_handler(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, - loff_t *ppos); -extern int dirty_bytes_handler(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, - loff_t *ppos); - -struct ctl_table; -int dirty_writeback_centisecs_handler(struct ctl_table *, int, - void __user *, size_t *, loff_t *); - -void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty); -unsigned long bdi_dirty_limit(struct backing_dev_info *bdi, - unsigned long dirty); - -void __bdi_update_bandwidth(struct backing_dev_info *bdi, - unsigned long thresh, - unsigned long bg_thresh, - unsigned long dirty, - unsigned long bdi_thresh, - unsigned long bdi_dirty, - unsigned long start_time); - -void page_writeback_init(void); -void balance_dirty_pages_ratelimited_nr(struct address_space *mapping, - unsigned long nr_pages_dirtied); - -static inline void -balance_dirty_pages_ratelimited(struct address_space *mapping) -{ - balance_dirty_pages_ratelimited_nr(mapping, 1); -} - -typedef int (*writepage_t)(struct page *page, struct writeback_control *wbc, - void *data); - -int generic_writepages(struct address_space *mapping, - struct writeback_control *wbc); -void tag_pages_for_writeback(struct address_space *mapping, - pgoff_t start, pgoff_t end); -int write_cache_pages(struct address_space *mapping, - struct writeback_control *wbc, writepage_t writepage, - void *data); -int do_writepages(struct address_space *mapping, struct writeback_control *wbc); -void set_page_dirty_balance(struct page *page, int page_mkwrite); -void writeback_set_ratelimit(void); -void tag_pages_for_writeback(struct address_space *mapping, - pgoff_t start, pgoff_t end); - -void account_page_redirty(struct page *page); - -/* pdflush.c */ -extern int nr_pdflush_threads; /* Global so it can be exported to sysctl - read-only. */ - - -#endif /* WRITEBACK_H */ |