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dd6216bb16
In case of q->elevator, passthrough request can still be marked as RQF_ELV, so some elevator callbacks will be called for them. Fix this by splitting RQF_SCHED_TAGS, which is set for all requests that are issued on a queue that uses an I/O scheduler, and RQF_USE_SCHED for non-flush, non-passthrough requests on such a queue. Roughly based on two different patches from Ming Lei <ming.lei@redhat.com>. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20230518053101.760632-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef BLK_MQ_SCHED_H
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#define BLK_MQ_SCHED_H
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#include "elevator.h"
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#include "blk-mq.h"
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#define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ)
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bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
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unsigned int nr_segs, struct request **merged_request);
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bool blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
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unsigned int nr_segs);
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bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq,
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struct list_head *free);
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void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
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void __blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
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void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
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int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
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void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
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void blk_mq_sched_free_rqs(struct request_queue *q);
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static inline void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
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{
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if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
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__blk_mq_sched_restart(hctx);
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}
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static inline bool bio_mergeable(struct bio *bio)
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{
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return !(bio->bi_opf & REQ_NOMERGE_FLAGS);
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}
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static inline bool
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blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
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struct bio *bio)
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{
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if (rq->rq_flags & RQF_USE_SCHED) {
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struct elevator_queue *e = q->elevator;
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if (e->type->ops.allow_merge)
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return e->type->ops.allow_merge(q, rq, bio);
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}
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return true;
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}
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static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
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{
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if (rq->rq_flags & RQF_USE_SCHED) {
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struct elevator_queue *e = rq->q->elevator;
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if (e->type->ops.completed_request)
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e->type->ops.completed_request(rq, now);
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}
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}
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static inline void blk_mq_sched_requeue_request(struct request *rq)
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{
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if (rq->rq_flags & RQF_USE_SCHED) {
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struct request_queue *q = rq->q;
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struct elevator_queue *e = q->elevator;
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if (e->type->ops.requeue_request)
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e->type->ops.requeue_request(rq);
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}
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}
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static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
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{
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struct elevator_queue *e = hctx->queue->elevator;
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if (e && e->type->ops.has_work)
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return e->type->ops.has_work(hctx);
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return false;
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}
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static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
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{
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return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
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}
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#endif
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