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Diffstat (limited to 'include/linux/backing-dev.h')
-rw-r--r--include/linux/backing-dev.h23
1 files changed, 11 insertions, 12 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index e9aec0d099df..7628219e5386 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -45,22 +45,21 @@ enum bdi_stat_item {
#define BDI_STAT_BATCH (8*(1+ilog2(nr_cpu_ids)))
struct bdi_writeback {
- struct list_head list; /* hangs off the bdi */
-
- struct backing_dev_info *bdi; /* our parent bdi */
+ struct backing_dev_info *bdi; /* our parent bdi */
unsigned int nr;
- unsigned long last_old_flush; /* last old data flush */
+ unsigned long last_old_flush; /* last old data flush */
+ unsigned long last_active; /* last time bdi thread was active */
- struct task_struct *task; /* writeback task */
- struct list_head b_dirty; /* dirty inodes */
- struct list_head b_io; /* parked for writeback */
- struct list_head b_more_io; /* parked for more writeback */
+ struct task_struct *task; /* writeback thread */
+ struct timer_list wakeup_timer; /* used for delayed bdi thread wakeup */
+ struct list_head b_dirty; /* dirty inodes */
+ struct list_head b_io; /* parked for writeback */
+ struct list_head b_more_io; /* parked for more writeback */
};
struct backing_dev_info {
struct list_head bdi_list;
- struct rcu_head rcu_head;
unsigned long ra_pages; /* max readahead in PAGE_CACHE_SIZE units */
unsigned long state; /* Always use atomic bitops on this */
unsigned int capabilities; /* Device capabilities */
@@ -80,8 +79,7 @@ struct backing_dev_info {
unsigned int max_ratio, max_prop_frac;
struct bdi_writeback wb; /* default writeback info for this bdi */
- spinlock_t wb_lock; /* protects update side of wb_list */
- struct list_head wb_list; /* the flusher threads hanging off this bdi */
+ spinlock_t wb_lock; /* protects work_list */
struct list_head work_list;
@@ -105,9 +103,10 @@ void bdi_unregister(struct backing_dev_info *bdi);
int bdi_setup_and_register(struct backing_dev_info *, char *, unsigned int);
void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages);
void bdi_start_background_writeback(struct backing_dev_info *bdi);
-int bdi_writeback_task(struct bdi_writeback *wb);
+int bdi_writeback_thread(void *data);
int bdi_has_dirty_io(struct backing_dev_info *bdi);
void bdi_arm_supers_timer(void);
+void bdi_wakeup_thread_delayed(struct backing_dev_info *bdi);
extern spinlock_t bdi_lock;
extern struct list_head bdi_list;