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[v9,02/17] block: Only use write locking if necessary

Message ID 20230816195447.3703954-3-bvanassche@acm.org
State Superseded
Headers show
Series Improve performance for zoned UFS devices | expand

Commit Message

Bart Van Assche Aug. 16, 2023, 7:53 p.m. UTC 
Make blk_req_needs_zone_write_lock() return false if
q->limits.use_zone_write_lock is false. Inline this function because it
is short and because it is called from the hot path of the mq-deadline
I/O scheduler.

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

diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 112620985bff..d8a80cce832f 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -53,11 +53,16 @@  const char *blk_zone_cond_str(enum blk_zone_cond zone_cond)
 EXPORT_SYMBOL_GPL(blk_zone_cond_str);
 
 /*
- * Return true if a request is a write requests that needs zone write locking.
+ * Return true if a request is a write request that needs zone write locking.
  */
 bool blk_req_needs_zone_write_lock(struct request *rq)
 {
-	if (!rq->q->disk->seq_zones_wlock)
+	struct request_queue *q = rq->q;
+
+	if (!q->limits.use_zone_write_lock)
+		return false;
+
+	if (!q->disk->seq_zones_wlock)
 		return false;
 
 	return blk_rq_is_seq_zoned_write(rq);