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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-04-07 20:40:09 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-04-07 20:40:09 +0200 |
| commit | 6d8c6c0f97ad8a3517c42b179c1dc8e77397d0e2 (patch) | |
| tree | 9400809275952c263a8512447cf625b3c490fa61 /block/blk-mq-sched.h | |
| parent | dm rq: Avoid that request processing stalls sporadically (diff) | |
| download | linux-6d8c6c0f97ad8a3517c42b179c1dc8e77397d0e2.tar.xz linux-6d8c6c0f97ad8a3517c42b179c1dc8e77397d0e2.zip | |
blk-mq: Restart a single queue if tag sets are shared
To improve scalability, if hardware queues are shared, restart
a single hardware queue in round-robin fashion. Rename
blk_mq_sched_restart_queues() to reflect the new semantics.
Remove blk_mq_sched_mark_restart_queue() because this function
has no callers. Remove flag QUEUE_FLAG_RESTART because this
patch removes the code that uses this flag.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-sched.h')
| -rw-r--r-- | block/blk-mq-sched.h | 16 |
1 files changed, 1 insertions, 15 deletions
diff --git a/block/blk-mq-sched.h b/block/blk-mq-sched.h index e704956e0862..3a9e6e40558b 100644 --- a/block/blk-mq-sched.h +++ b/block/blk-mq-sched.h @@ -19,7 +19,7 @@ bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, struct request **merged_request); bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio); bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq); -void blk_mq_sched_restart_queues(struct blk_mq_hw_ctx *hctx); +void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx); void blk_mq_sched_insert_request(struct request *rq, bool at_head, bool run_queue, bool async, bool can_block); @@ -136,20 +136,6 @@ static inline void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx) set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); } -/* - * Mark a hardware queue and the request queue it belongs to as needing a - * restart. - */ -static inline void blk_mq_sched_mark_restart_queue(struct blk_mq_hw_ctx *hctx) -{ - struct request_queue *q = hctx->queue; - - if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) - set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); - if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags)) - set_bit(QUEUE_FLAG_RESTART, &q->queue_flags); -} - static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx) { return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); |