diff options
| author | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-28 08:53:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-28 08:53:49 -0700 |
| commit | 28d721e24c88496ff8e9c4a0959bdc1415c0658e (patch) | |
| tree | 0652161bbbcbfddf47c7ddb25d2db8ecd4cbec89 /include/linux/blkdev.h | |
| parent | 0ee40c6628434f0535da31deeacc28b61e80d810 (diff) | |
| parent | cb19833dccb32f97cacbfff834b53523915f13f6 (diff) | |
Merge branch 'generic-dispatch' of git://brick.kernel.dk/data/git/linux-2.6-block
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 1afbdb2d752..fffe163316a 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -203,6 +203,7 @@ struct request { enum rq_flag_bits { __REQ_RW, /* not set, read. set, write */ __REQ_FAILFAST, /* no low level driver retries */ + __REQ_SORTED, /* elevator knows about this request */ __REQ_SOFTBARRIER, /* may not be passed by ioscheduler */ __REQ_HARDBARRIER, /* may not be passed by drive either */ __REQ_CMD, /* is a regular fs rw request */ @@ -235,6 +236,7 @@ enum rq_flag_bits { #define REQ_RW (1 << __REQ_RW) #define REQ_FAILFAST (1 << __REQ_FAILFAST) +#define REQ_SORTED (1 << __REQ_SORTED) #define REQ_SOFTBARRIER (1 << __REQ_SOFTBARRIER) #define REQ_HARDBARRIER (1 << __REQ_HARDBARRIER) #define REQ_CMD (1 << __REQ_CMD) @@ -333,6 +335,12 @@ struct request_queue end_flush_fn *end_flush_fn; /* + * Dispatch queue sorting + */ + sector_t end_sector; + struct request *boundary_rq; + + /* * Auto-unplugging state */ struct timer_list unplug_timer; @@ -454,6 +462,7 @@ enum { #define blk_pm_request(rq) \ ((rq)->flags & (REQ_PM_SUSPEND | REQ_PM_RESUME)) +#define blk_sorted_rq(rq) ((rq)->flags & REQ_SORTED) #define blk_barrier_rq(rq) ((rq)->flags & REQ_HARDBARRIER) #define blk_barrier_preflush(rq) ((rq)->flags & REQ_BAR_PREFLUSH) #define blk_barrier_postflush(rq) ((rq)->flags & REQ_BAR_POSTFLUSH) @@ -611,12 +620,21 @@ extern void end_request(struct request *req, int uptodate); static inline void blkdev_dequeue_request(struct request *req) { - BUG_ON(list_empty(&req->queuelist)); + elv_dequeue_request(req->q, req); +} - list_del_init(&req->queuelist); +/* + * This should be in elevator.h, but that requires pulling in rq and q + */ +static inline void elv_dispatch_add_tail(struct request_queue *q, + struct request *rq) +{ + if (q->last_merge == rq) + q->last_merge = NULL; - if (req->rl) - elv_remove_request(req->q, req); + q->end_sector = rq_end_sector(rq); + q->boundary_rq = rq; + list_add_tail(&rq->queuelist, &q->queue_head); } /* |