diff options
Diffstat (limited to 'include/linux/writeback.h')
| -rw-r--r-- | include/linux/writeback.h | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h index a06b0f116ebd..af3ec94cb2ad 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -24,18 +24,22 @@ static inline int current_is_pdflush(void) /* * fs/fs-writeback.c */ -#define WB_SYNC_NONE 0 /* Don't wait on anything */ -#define WB_SYNC_LAST 1 /* Wait on the last-written mapping */ -#define WB_SYNC_ALL 2 /* Wait on every mapping */ -#define WB_SYNC_HOLD 3 /* Hold the inode on sb_dirty for sys_sync() */ +enum writeback_sync_modes { + WB_SYNC_NONE = 0, /* Don't wait on anything */ + WB_SYNC_LAST = 1, /* Wait on the last-written mapping */ + WB_SYNC_ALL = 2, /* Wait on every mapping */ + WB_SYNC_HOLD = 3, /* Hold the inode on sb_dirty for sys_sync() */ +}; -void writeback_unlocked_inodes(int *nr_to_write, int sync_mode, - unsigned long *older_than_this); +void writeback_unlocked_inodes(int *nr_to_write, + enum writeback_sync_modes sync_mode, + unsigned long *older_than_this); void wake_up_inode(struct inode *inode); void __wait_on_inode(struct inode * inode); void sync_inodes_sb(struct super_block *, int wait); void sync_inodes(int wait); +/* writeback.h requires fs.h; it, too, is not included from here. */ static inline void wait_on_inode(struct inode *inode) { if (inode->i_state & I_LOCK) @@ -45,15 +49,22 @@ static inline void wait_on_inode(struct inode *inode) /* * mm/page-writeback.c */ +/* These 5 are exported to sysctl. */ extern int dirty_background_ratio; extern int dirty_async_ratio; extern int dirty_sync_ratio; extern int dirty_writeback_centisecs; extern int dirty_expire_centisecs; + void balance_dirty_pages(struct address_space *mapping); void balance_dirty_pages_ratelimited(struct address_space *mapping); int pdflush_operation(void (*fn)(unsigned long), unsigned long arg0); int do_writepages(struct address_space *mapping, int *nr_to_write); +/* pdflush.c */ +extern int nr_pdflush_threads; /* Global so it can be exported to sysctl + read-only. */ + + #endif /* WRITEBACK_H */ |