/*
- * include/linux/writeback.h.
+ * include/linux/writeback.h
*/
#ifndef WRITEBACK_H
#define WRITEBACK_H
+#include <linux/sched.h>
+#include <linux/fs.h>
+
struct backing_dev_info;
extern spinlock_t inode_lock;
* 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 start;
- loff_t end;
-
- unsigned nonblocking:1; /* Don't get stuck on request queues */
- unsigned encountered_congestion:1; /* An output: a queue is full */
- unsigned for_kupdate:1; /* A kupdate writeback */
- unsigned for_reclaim:1; /* Invoked from the page allocator */
+ loff_t range_start;
+ loff_t range_end;
+
+ unsigned nonblocking:1; /* Don't get stuck on request queues */
+ unsigned encountered_congestion:1; /* An output: a queue is full */
+ unsigned for_kupdate:1; /* A kupdate writeback */
+ unsigned for_reclaim:1; /* Invoked from the page allocator */
+ unsigned for_writepages:1; /* This is a writepages() call */
+ unsigned range_cyclic:1; /* range_start is cyclic */
+ unsigned more_io:1; /* more io to be dispatched */
};
/*
- * ->writepage() return values (make these much larger than a pagesize, in
- * case some fs is returning number-of-bytes-written from writepage)
- */
-#define WRITEPAGE_ACTIVATE 0x80000 /* IO was not started: activate page */
-
-/*
* fs/fs-writeback.c
*/
void writeback_inodes(struct writeback_control *wbc);
-void wake_up_inode(struct inode *inode);
int inode_wait(void *);
void sync_inodes_sb(struct super_block *, int wait);
void sync_inodes(int wait);
wait_on_bit(&inode->i_state, __I_LOCK, 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
int wakeup_pdflush(long nr_pages);
void laptop_io_completion(void);
void laptop_sync_completion(void);
-void throttle_vm_writeout(void);
+void throttle_vm_writeout(gfp_t gfp_mask);
/* These are exported to sysctl. */
extern int dirty_background_ratio;
extern int vm_dirty_ratio;
-extern int dirty_writeback_centisecs;
-extern int dirty_expire_centisecs;
+extern int dirty_writeback_interval;
+extern int dirty_expire_interval;
+extern int vm_highmem_is_dirtyable;
extern int block_dump;
extern int laptop_mode;
+extern int dirty_ratio_handler(struct ctl_table *table, int write,
+ struct file *filp, void __user *buffer, size_t *lenp,
+ loff_t *ppos);
+
struct ctl_table;
struct file;
int dirty_writeback_centisecs_handler(struct ctl_table *, int, struct file *,
void __user *, size_t *, loff_t *);
void page_writeback_init(void);
-void balance_dirty_pages_ratelimited(struct address_space *mapping);
+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 pdflush_operation(void (*fn)(unsigned long), unsigned long arg0);
+int generic_writepages(struct address_space *mapping,
+ struct writeback_control *wbc);
+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);
int sync_page_range(struct inode *inode, struct address_space *mapping,
- loff_t pos, size_t count);
-int sync_page_range_nolock(struct inode *inode, struct address_space
- *mapping, loff_t pos, size_t count);
+ loff_t pos, loff_t count);
+int sync_page_range_nolock(struct inode *inode, struct address_space *mapping,
+ loff_t pos, loff_t count);
+void set_page_dirty_balance(struct page *page, int page_mkwrite);
+void writeback_set_ratelimit(void);
/* pdflush.c */
extern int nr_pdflush_threads; /* Global so it can be exported to sysctl