diff mbox series

[RESEND,v3,09/13] blk-mq: Add blk_mq_tag_update_sched_shared_sbitmap()

Message ID 1631545950-56586-10-git-send-email-john.garry@huawei.com
State New
Headers show
Series blk-mq: Reduce static requests memory footprint for shared sbitmap | expand

Commit Message

John Garry Sept. 13, 2021, 3:12 p.m. UTC 
Put the functionality to update the sched shared sbitmap size in a common
function.

Since the same formula is always used to resize, and it can be got from
the request queue argument, so just pass the request queue pointer.

Signed-off-by: John Garry <john.garry@huawei.com>

Reviewed-by: Ming Lei <ming.lei@redhat.com>

---
 block/blk-mq-sched.c | 3 +--
 block/blk-mq-tag.c   | 6 ++++++
 block/blk-mq-tag.h   | 1 +
 block/blk-mq.c       | 3 +--
 4 files changed, 9 insertions(+), 4 deletions(-)

-- 
2.26.2

Comments

Hannes Reinecke Sept. 14, 2021, 5:46 a.m. UTC | #1 
On 9/13/21 5:12 PM, John Garry wrote:
> Put the functionality to update the sched shared sbitmap size in a common

> function.

> 

> Since the same formula is always used to resize, and it can be got from

> the request queue argument, so just pass the request queue pointer.

> 

> Signed-off-by: John Garry <john.garry@huawei.com>

> Reviewed-by: Ming Lei <ming.lei@redhat.com>

> ---

>   block/blk-mq-sched.c | 3 +--

>   block/blk-mq-tag.c   | 6 ++++++

>   block/blk-mq-tag.h   | 1 +

>   block/blk-mq.c       | 3 +--

>   4 files changed, 9 insertions(+), 4 deletions(-)

> Reviewed-by: Hannes Reinecke <hare@suse.de>


Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@suse.de                              +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
diff mbox series

Patch

diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index 3ab26154f0ea..a3b5a5399bc8 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -575,8 +575,7 @@  static int blk_mq_init_sched_shared_sbitmap(struct request_queue *queue)
 					&queue->sched_breserved_tags;
 	}
 
-	sbitmap_queue_resize(&queue->sched_bitmap_tags,
-			     queue->nr_requests - set->reserved_tags);
+	blk_mq_tag_update_sched_shared_sbitmap(queue);
 
 	return 0;
 }
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index 86f87346232a..5f06ad6efc8f 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -634,6 +634,12 @@  void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set, unsigned int s
 	sbitmap_queue_resize(&set->__bitmap_tags, size - set->reserved_tags);
 }
 
+void blk_mq_tag_update_sched_shared_sbitmap(struct request_queue *q)
+{
+	sbitmap_queue_resize(&q->sched_bitmap_tags,
+			     q->nr_requests - q->tag_set->reserved_tags);
+}
+
 /**
  * blk_mq_unique_tag() - return a tag that is unique queue-wide
  * @rq: request for which to compute a unique tag
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index 8ed55af08427..88f3c6485543 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -48,6 +48,7 @@  extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
 					unsigned int depth, bool can_grow);
 extern void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set,
 					     unsigned int size);
+extern void blk_mq_tag_update_sched_shared_sbitmap(struct request_queue *q);
 
 extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
 void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 5229c5420b85..5fec444d6399 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3641,8 +3641,7 @@  int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr)
 		q->nr_requests = nr;
 		if (blk_mq_is_sbitmap_shared(set->flags)) {
 			if (q->elevator)
-				sbitmap_queue_resize(&q->sched_bitmap_tags,
-						     nr - set->reserved_tags);
+				blk_mq_tag_update_sched_shared_sbitmap(q);
 			else
 				blk_mq_tag_resize_shared_sbitmap(set, nr);
 		}