linux-kernel - [PATCH v4 02/13] block: Rename BLKDEV_MAX_RQ -> BLKDEV_DEFAULT

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Date:   Fri, 24 Sep 2021 16:28:19 +0800
From:   John Garry <john.garry@...wei.com>
To:     <axboe@...nel.dk>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-scsi@...r.kernel.org>, <ming.lei@...hat.com>,
        <hare@...e.de>, "John Garry" <john.garry@...wei.com>
Subject: [PATCH v4 02/13] block: Rename BLKDEV_MAX_RQ -> BLKDEV_DEFAULT_RQ

It is a bit confusing that there is BLKDEV_MAX_RQ and MAX_SCHED_RQ, as
the name BLKDEV_MAX_RQ would imply the max requests always, which it is
not.

Rename to BLKDEV_MAX_RQ to BLKDEV_DEFAULT_RQ, matching it's usage - that being
the default number of requests assigned when allocating a request queue.

Signed-off-by: John Garry <john.garry@...wei.com>
Reviewed-by: Ming Lei <ming.lei@...hat.com>
Reviewed-by: Hannes Reinecke <hare@...e.de>
---
 block/blk-core.c       | 2 +-
 block/blk-mq-sched.c   | 2 +-
 block/blk-mq-sched.h   | 2 +-
 drivers/block/rbd.c    | 2 +-
 include/linux/blkdev.h | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index 5454db2fa263..5d7137bec48e 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -568,7 +568,7 @@ struct request_queue *blk_alloc_queue(int node_id)
 
 	blk_queue_dma_alignment(q, 511);
 	blk_set_default_limits(&q->limits);
-	q->nr_requests = BLKDEV_MAX_RQ;
+	q->nr_requests = BLKDEV_DEFAULT_RQ;
 
 	return q;
 
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index 0f006cabfd91..2231fb0d4c35 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -606,7 +606,7 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e)
 	 * Additionally, this is a per-hw queue depth.
 	 */
 	q->nr_requests = 2 * min_t(unsigned int, q->tag_set->queue_depth,
-				   BLKDEV_MAX_RQ);
+				   BLKDEV_DEFAULT_RQ);
 
 	queue_for_each_hw_ctx(q, hctx, i) {
 		ret = blk_mq_sched_alloc_tags(q, hctx, i);
diff --git a/block/blk-mq-sched.h b/block/blk-mq-sched.h
index 5246ae040704..1e46be6c5178 100644
--- a/block/blk-mq-sched.h
+++ b/block/blk-mq-sched.h
@@ -5,7 +5,7 @@
 #include "blk-mq.h"
 #include "blk-mq-tag.h"
 
-#define MAX_SCHED_RQ (16 * BLKDEV_MAX_RQ)
+#define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ)
 
 void blk_mq_sched_assign_ioc(struct request *rq);
 
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index e65c9d706f6f..bf60aebd0cfb 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -836,7 +836,7 @@ struct rbd_options {
 	u32 alloc_hint_flags;  /* CEPH_OSD_OP_ALLOC_HINT_FLAG_* */
 };
 
-#define RBD_QUEUE_DEPTH_DEFAULT	BLKDEV_MAX_RQ
+#define RBD_QUEUE_DEPTH_DEFAULT	BLKDEV_DEFAULT_RQ
 #define RBD_ALLOC_SIZE_DEFAULT	(64 * 1024)
 #define RBD_LOCK_TIMEOUT_DEFAULT 0  /* no timeout */
 #define RBD_READ_ONLY_DEFAULT	false
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 12b9dbcc980e..4baf9435232d 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -40,7 +40,7 @@ struct blk_stat_callback;
 struct blk_keyslot_manager;
 
 #define BLKDEV_MIN_RQ	4
-#define BLKDEV_MAX_RQ	128	/* Default maximum */
+#define BLKDEV_DEFAULT_RQ	128
 
 /* Must be consistent with blk_mq_poll_stats_bkt() */
 #define BLK_MQ_POLL_STATS_BKTS 16
-- 
2.26.2