diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/blk_types.h | 2 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 25 | ||||
| -rw-r--r-- | include/linux/elevator.h | 1 |
3 files changed, 18 insertions, 10 deletions
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 46ad5197537a..dddedfc0af81 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -148,6 +148,7 @@ enum rq_flag_bits { __REQ_ALLOCED, /* request came from our alloc pool */ __REQ_COPY_USER, /* contains copies of user pages */ __REQ_FLUSH, /* request for cache flush */ + __REQ_FLUSH_SEQ, /* request for flush sequence */ __REQ_IO_STAT, /* account I/O stat */ __REQ_MIXED_MERGE, /* merge of different types, fail separately */ __REQ_SECURE, /* secure discard (used with __REQ_DISCARD) */ @@ -188,6 +189,7 @@ enum rq_flag_bits { #define REQ_ALLOCED (1 << __REQ_ALLOCED) #define REQ_COPY_USER (1 << __REQ_COPY_USER) #define REQ_FLUSH (1 << __REQ_FLUSH) +#define REQ_FLUSH_SEQ (1 << __REQ_FLUSH_SEQ) #define REQ_IO_STAT (1 << __REQ_IO_STAT) #define REQ_MIXED_MERGE (1 << __REQ_MIXED_MERGE) #define REQ_SECURE (1 << __REQ_SECURE) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index d5063e1b5555..13b75ca62181 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -108,11 +108,17 @@ struct request { /* * Three pointers are available for the IO schedulers, if they need - * more they have to dynamically allocate it. + * more they have to dynamically allocate it. Flush requests are + * never put on the IO scheduler. So let the flush fields share + * space with the three elevator_private pointers. */ - void *elevator_private; - void *elevator_private2; - void *elevator_private3; + union { + void *elevator_private[3]; + struct { + unsigned int seq; + struct list_head list; + } flush; + }; struct gendisk *rq_disk; struct hd_struct *part; @@ -363,11 +369,12 @@ struct request_queue * for flush operations */ unsigned int flush_flags; - unsigned int flush_seq; - int flush_err; + unsigned int flush_pending_idx:1; + unsigned int flush_running_idx:1; + unsigned long flush_pending_since; + struct list_head flush_queue[2]; + struct list_head flush_data_in_flight; struct request flush_rq; - struct request *orig_flush_rq; - struct list_head pending_flushes; struct mutex sysfs_lock; @@ -1135,7 +1142,6 @@ static inline uint64_t rq_io_start_time_ns(struct request *req) extern int blk_throtl_init(struct request_queue *q); extern void blk_throtl_exit(struct request_queue *q); extern int blk_throtl_bio(struct request_queue *q, struct bio **bio); -extern void throtl_shutdown_timer_wq(struct request_queue *q); #else /* CONFIG_BLK_DEV_THROTTLING */ static inline int blk_throtl_bio(struct request_queue *q, struct bio **bio) { @@ -1144,7 +1150,6 @@ static inline int blk_throtl_bio(struct request_queue *q, struct bio **bio) static inline int blk_throtl_init(struct request_queue *q) { return 0; } static inline int blk_throtl_exit(struct request_queue *q) { return 0; } -static inline void throtl_shutdown_timer_wq(struct request_queue *q) {} #endif /* CONFIG_BLK_DEV_THROTTLING */ #define MODULE_ALIAS_BLOCKDEV(major,minor) \ diff --git a/include/linux/elevator.h b/include/linux/elevator.h index 4d857973d2c9..39b68edb388d 100644 --- a/include/linux/elevator.h +++ b/include/linux/elevator.h @@ -167,6 +167,7 @@ extern struct request *elv_rb_find(struct rb_root *, sector_t); #define ELEVATOR_INSERT_BACK 2 #define ELEVATOR_INSERT_SORT 3 #define ELEVATOR_INSERT_REQUEUE 4 +#define ELEVATOR_INSERT_FLUSH 5 /* * return values from elevator_may_queue_fn |
