[dm-devel] [PATCH v3 6/7] dm: Inline __dm_mq_kick_requeue_list()

[dm-devel] [PATCH v3 6/7] dm: Inline __dm_mq_kick_requeue_list()

[Bart Van Assche]

Since commit 52d7f1b5c2f3 ("blk-mq: Avoid that requeueing starts stopped
queues") the function __dm_mq_kick_requeue_list() is too short to keep it
as a separate function. Hence, inline this function.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/md/dm-rq.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index f7e9a3632eb3..bbe1e2ea0aa4 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -168,21 +168,16 @@ static void dm_end_request(struct request *clone, blk_status_t error)
 	rq_completed(md);
 }
 
-static void __dm_mq_kick_requeue_list(struct request_queue *q, unsigned long msecs)
-{
-	blk_mq_delay_kick_requeue_list(q, msecs);
-}
-
 void dm_mq_kick_requeue_list(struct mapped_device *md)
 {
-	__dm_mq_kick_requeue_list(md->queue, 0);
+	blk_mq_kick_requeue_list(md->queue);
 }
 EXPORT_SYMBOL(dm_mq_kick_requeue_list);
 
 static void dm_mq_delay_requeue_request(struct request *rq, unsigned long msecs)
 {
 	blk_mq_requeue_request(rq, false);
-	__dm_mq_kick_requeue_list(rq->q, msecs);
+	blk_mq_delay_kick_requeue_list(rq->q, msecs);
 }
 
 static void dm_requeue_original_request(struct dm_rq_target_io *tio, bool delay_requeue)

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[dm-devel] [PATCH v3 7/7] block: Inline blk_mq_{, delay_}kick_requeue_list()

[Bart Van Assche]

Patch "block: Preserve the order of requeued requests" changed
blk_mq_kick_requeue_list() and blk_mq_delay_kick_requeue_list() into
blk_mq_run_hw_queues() and blk_mq_delay_run_hw_queues() calls
respectively. Inline blk_mq_{,delay_}kick_requeue_list() because these
functions are now too short to keep these as separate functions.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 block/blk-flush.c            |  4 ++--
 block/blk-mq-debugfs.c       |  2 +-
 block/blk-mq.c               | 16 +---------------
 drivers/block/ublk_drv.c     |  6 +++---
 drivers/block/xen-blkfront.c |  1 -
 drivers/md/dm-rq.c           |  6 +++---
 drivers/nvme/host/core.c     |  2 +-
 drivers/s390/block/scm_blk.c |  2 +-
 drivers/scsi/scsi_lib.c      |  2 +-
 include/linux/blk-mq.h       |  2 --
 10 files changed, 13 insertions(+), 30 deletions(-)

diff --git a/block/blk-flush.c b/block/blk-flush.c
index dba392cf22be..22170036ddcb 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -191,7 +191,7 @@ static void blk_flush_complete_seq(struct request *rq,
 		spin_lock(&q->requeue_lock);
 		list_add_tail(&rq->queuelist, &q->flush_list);
 		spin_unlock(&q->requeue_lock);
-		blk_mq_kick_requeue_list(q);
+		blk_mq_run_hw_queues(q, true);
 		break;
 
 	case REQ_FSEQ_DONE:
@@ -352,7 +352,7 @@ static void blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq,
 	list_add_tail(&flush_rq->queuelist, &q->flush_list);
 	spin_unlock(&q->requeue_lock);
 
-	blk_mq_kick_requeue_list(q);
+	blk_mq_run_hw_queues(q, true);
 }
 
 static enum rq_end_io_ret mq_flush_data_end_io(struct request *rq,
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 68165a50951b..869cc62ed50f 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -145,7 +145,7 @@ static ssize_t queue_state_write(void *data, const char __user *buf,
 	} else if (strcmp(op, "start") == 0) {
 		blk_mq_start_stopped_hw_queues(q, true);
 	} else if (strcmp(op, "kick") == 0) {
-		blk_mq_kick_requeue_list(q);
+		blk_mq_run_hw_queues(q, true);
 	} else {
 		pr_err("%s: unsupported operation '%s'\n", __func__, op);
 inval:
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 52dffdc70480..34dcfc84d902 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1430,7 +1430,7 @@ void blk_mq_requeue_request(struct request *rq, bool kick_requeue_list)
 	spin_unlock_irqrestore(&q->requeue_lock, flags);
 
 	if (kick_requeue_list)
-		blk_mq_kick_requeue_list(q);
+		blk_mq_run_hw_queues(q, true);
 }
 EXPORT_SYMBOL(blk_mq_requeue_request);
 
@@ -1470,19 +1470,6 @@ static void blk_mq_process_requeue_list(struct blk_mq_hw_ctx *hctx)
 		blk_mq_insert_request(rq, 0);
 }
 
-void blk_mq_kick_requeue_list(struct request_queue *q)
-{
-	blk_mq_run_hw_queues(q, true);
-}
-EXPORT_SYMBOL(blk_mq_kick_requeue_list);
-
-void blk_mq_delay_kick_requeue_list(struct request_queue *q,
-				    unsigned long msecs)
-{
-	blk_mq_delay_run_hw_queues(q, msecs);
-}
-EXPORT_SYMBOL(blk_mq_delay_kick_requeue_list);
-
 static bool blk_mq_rq_inflight(struct request *rq, void *priv)
 {
 	/*
@@ -3537,7 +3524,6 @@ static int blk_mq_hctx_notify_dead(unsigned int cpu, struct hlist_node *node)
 
 	list_for_each_entry_safe(rq, next, &tmp, queuelist)
 		blk_mq_requeue_request(rq, false);
-	blk_mq_kick_requeue_list(hctx->queue);
 
 	blk_mq_run_hw_queue(hctx, true);
 	return 0;
diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 539eada32861..4a3d579a25b5 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -900,7 +900,7 @@ static inline void __ublk_rq_task_work(struct request *req,
 		 */
 		if (unlikely(!mapped_bytes)) {
 			blk_mq_requeue_request(req, false);
-			blk_mq_delay_kick_requeue_list(req->q,
+			blk_mq_delay_run_hw_queues(req->q,
 					UBLK_REQUEUE_DELAY_MS);
 			return;
 		}
@@ -1290,7 +1290,7 @@ static void ublk_unquiesce_dev(struct ublk_device *ub)
 
 	blk_mq_unquiesce_queue(ub->ub_disk->queue);
 	/* We may have requeued some rqs in ublk_quiesce_queue() */
-	blk_mq_kick_requeue_list(ub->ub_disk->queue);
+	blk_mq_run_hw_queues(ub->ub_disk->queue, true);
 }
 
 static void ublk_stop_dev(struct ublk_device *ub)
@@ -2334,7 +2334,7 @@ static int ublk_ctrl_end_recovery(struct ublk_device *ub,
 	blk_mq_unquiesce_queue(ub->ub_disk->queue);
 	pr_devel("%s: queue unquiesced, dev id %d.\n",
 			__func__, header->dev_id);
-	blk_mq_kick_requeue_list(ub->ub_disk->queue);
+	blk_mq_run_hw_queues(ub->ub_disk->queue, true);
 	ub->dev_info.state = UBLK_S_DEV_LIVE;
 	schedule_delayed_work(&ub->monitor_work, UBLK_DAEMON_MONITOR_PERIOD);
 	ret = 0;
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 23ed258b57f0..6b37a134dd3a 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -2040,7 +2040,6 @@ static int blkif_recover(struct blkfront_info *info)
 		blk_mq_requeue_request(req, false);
 	}
 	blk_mq_start_stopped_hw_queues(info->rq, true);
-	blk_mq_kick_requeue_list(info->rq);
 
 	while ((bio = bio_list_pop(&info->bio_list)) != NULL) {
 		/* Traverse the list of pending bios and re-queue them */
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index bbe1e2ea0aa4..6421cc2c9852 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -64,7 +64,7 @@ int dm_request_based(struct mapped_device *md)
 void dm_start_queue(struct request_queue *q)
 {
 	blk_mq_unquiesce_queue(q);
-	blk_mq_kick_requeue_list(q);
+	blk_mq_run_hw_queues(q, true);
 }
 
 void dm_stop_queue(struct request_queue *q)
@@ -170,14 +170,14 @@ static void dm_end_request(struct request *clone, blk_status_t error)
 
 void dm_mq_kick_requeue_list(struct mapped_device *md)
 {
-	blk_mq_kick_requeue_list(md->queue);
+	blk_mq_run_hw_queues(md->queue, true);
 }
 EXPORT_SYMBOL(dm_mq_kick_requeue_list);
 
 static void dm_mq_delay_requeue_request(struct request *rq, unsigned long msecs)
 {
 	blk_mq_requeue_request(rq, false);
-	blk_mq_delay_kick_requeue_list(rq->q, msecs);
+	blk_mq_delay_run_hw_queues(rq->q, msecs);
 }
 
 static void dm_requeue_original_request(struct dm_rq_target_io *tio, bool delay_requeue)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index ccb6eb1282f8..9d3e4de23787 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -303,7 +303,7 @@ static void nvme_retry_req(struct request *req)
 
 	nvme_req(req)->retries++;
 	blk_mq_requeue_request(req, false);
-	blk_mq_delay_kick_requeue_list(req->q, delay);
+	blk_mq_delay_run_hw_queues(req->q, delay);
 }
 
 static void nvme_log_error(struct request *req)
diff --git a/drivers/s390/block/scm_blk.c b/drivers/s390/block/scm_blk.c
index 0c1df1d5f1ac..fe5937d28fdc 100644
--- a/drivers/s390/block/scm_blk.c
+++ b/drivers/s390/block/scm_blk.c
@@ -243,7 +243,7 @@ static void scm_request_requeue(struct scm_request *scmrq)
 
 	atomic_dec(&bdev->queued_reqs);
 	scm_request_done(scmrq);
-	blk_mq_kick_requeue_list(bdev->rq);
+	blk_mq_run_hw_queues(bdev->rq, true);
 }
 
 static void scm_request_finish(struct scm_request *scmrq)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index b7c569a42aa4..d74903221638 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -124,7 +124,7 @@ static void scsi_mq_requeue_cmd(struct scsi_cmnd *cmd, unsigned long msecs)
 
 	if (msecs) {
 		blk_mq_requeue_request(rq, false);
-		blk_mq_delay_kick_requeue_list(rq->q, msecs);
+		blk_mq_delay_run_hw_queues(rq->q, msecs);
 	} else
 		blk_mq_requeue_request(rq, true);
 }
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 363894aea0e8..79b67664ace7 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -867,8 +867,6 @@ static inline bool blk_mq_add_to_batch(struct request *req,
 }
 
 void blk_mq_requeue_request(struct request *rq, bool kick_requeue_list);
-void blk_mq_kick_requeue_list(struct request_queue *q);
-void blk_mq_delay_kick_requeue_list(struct request_queue *q, unsigned long msecs);
 void blk_mq_complete_request(struct request *rq);
 bool blk_mq_complete_request_remote(struct request *rq);
 void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx);

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Re: [dm-devel] [PATCH v3 6/7] dm: Inline __dm_mq_kick_requeue_list()

[Christoph Hellwig]

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>

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Re: [dm-devel] [PATCH v3 7/7] block: Inline blk_mq_{, delay_}kick_requeue_list()

[Vineeth Vijayan]

On 5/22/23 20:38, Bart Van Assche wrote:
> Patch "block: Preserve the order of requeued requests" changed
> blk_mq_kick_requeue_list() and blk_mq_delay_kick_requeue_list() into
> blk_mq_run_hw_queues() and blk_mq_delay_run_hw_queues() calls
> respectively. Inline blk_mq_{,delay_}kick_requeue_list() because these
> functions are now too short to keep these as separate functions.
>
> Cc: Christoph Hellwig <hch@lst.de>
> Cc: Damien Le Moal <dlemoal@kernel.org>
> Cc: Ming Lei <ming.lei@redhat.com>
> Cc: Mike Snitzer <snitzer@kernel.org>
> Signed-off-by: Bart Van Assche <bvanassche@acm.org>
> ---
>   block/blk-flush.c            |  4 ++--
>   block/blk-mq-debugfs.c       |  2 +-
>   block/blk-mq.c               | 16 +---------------
>   drivers/block/ublk_drv.c     |  6 +++---
>   drivers/block/xen-blkfront.c |  1 -
>   drivers/md/dm-rq.c           |  6 +++---
>   drivers/nvme/host/core.c     |  2 +-
>   drivers/s390/block/scm_blk.c |  2 +-
>   drivers/scsi/scsi_lib.c      |  2 +-
>   include/linux/blk-mq.h       |  2 --
>   10 files changed, 13 insertions(+), 30 deletions(-)
The scm_blk.c changes looks good to me. thanks.

Acked-by: Vineeth Vijayan <vneethv@linux.ibm.com>

...

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