linux-kernel - [PATCH 11/20] block, bfq: remove unnecessary "wr" part of wr_or_deserves

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Date:   Tue, 1 Nov 2022 17:34:08 +0800
From:   Kemeng Shi <shikemeng@...wei.com>
To:     <paolo.valente@...aro.org>, <axboe@...nel.dk>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <shikemeng@...wei.com>
Subject: [PATCH 11/20] block, bfq: remove unnecessary "wr" part of wr_or_deserves_wr

Before commit 96a291c38c3299 ("block, bfq: preempt lower-weight or
lower-priority queues"), wr_or_deserves_wr is used to check if
preempt is wanted. Currently, wr_or_deserves_wr is only used in
bfq_update_bfqq_wr_on_rq_arrival to check if weight raising is
needed, so the "wr" part of wr_or_deserves_wr is not needed
anymore. Rename wr_or_deserves_wr to deserves_wr and remove
unnecessary bfqq->wr_coeff > 1 for original wr_or_deserves_wr.

Signed-off-by: Kemeng Shi <shikemeng@...wei.com>
---
 block/bfq-iosched.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 0ecb3640d715..261ba2d63925 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -1681,12 +1681,12 @@ static unsigned long bfq_smallest_from_now(void)
 static void bfq_update_bfqq_wr_on_rq_arrival(struct bfq_data *bfqd,
 					     struct bfq_queue *bfqq,
 					     unsigned int old_wr_coeff,
-					     bool wr_or_deserves_wr,
+					     bool deserves_wr,
 					     bool interactive,
 					     bool in_burst,
 					     bool soft_rt)
 {
-	if (old_wr_coeff == 1 && wr_or_deserves_wr) {
+	if (old_wr_coeff == 1 && deserves_wr) {
 		/* start a weight-raising period */
 		if (interactive) {
 			bfqq->service_from_wr = 0;
@@ -1866,7 +1866,7 @@ static void bfq_bfqq_handle_idle_busy_switch(struct bfq_data *bfqd,
 	bfq_clear_bfqq_just_created(bfqq);
 
 	if (bfqd->low_latency) {
-		bool soft_rt, in_burst,	wr_or_deserves_wr;
+		bool soft_rt, in_burst,	deserves_wr;
 		/*
 		 * bfqq deserves to be weight-raised if:
 		 * - it is sync,
@@ -1905,14 +1905,13 @@ static void bfq_bfqq_handle_idle_busy_switch(struct bfq_data *bfqd,
 			 * processes. So let also stably-merged queued enjoy weight
 			 * raising.
 			 */
-			wr_or_deserves_wr = (bfqq->wr_coeff > 1 ||
-					(bfq_bfqq_sync(bfqq) &&
+			deserves_wr = (bfq_bfqq_sync(bfqq) &&
 					 (bfqq->bic || RQ_BIC(rq)->stably_merged) &&
-					 (*interactive || soft_rt)));
+					 (*interactive || soft_rt));
 
 			bfq_update_bfqq_wr_on_rq_arrival(bfqd, bfqq,
 							 old_wr_coeff,
-							 wr_or_deserves_wr,
+							 deserves_wr,
 							 *interactive,
 							 in_burst,
 							 soft_rt);
-- 
2.30.0