linux-kernel - [PATCH 10/10] block, bfq: remove check of bfq_wr_max_softrt

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Message-ID: <20221108045224.19092-11-shikemeng@huawei.com>
Date:   Tue, 8 Nov 2022 12:52:24 +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 10/10] block, bfq: remove check of bfq_wr_max_softrt_rate which is always greater than 0

bfqd->bfq_wr_max_softrt_rate is assigned with 7000 in bfq_init_queue and
never changed. So we can remove bfqd->bfq_wr_max_softrt_rate > 0 check
which is always true.

Signed-off-by: Kemeng Shi <shikemeng@...wei.com>
---
 block/bfq-iosched.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 40ac219b2d8f..d0a867b2569b 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -1840,8 +1840,7 @@ static void bfq_bfqq_handle_idle_busy_switch(struct bfq_data *bfqd,
 	 *   to control its weight explicitly)
 	 */
 	in_burst = bfq_bfqq_in_large_burst(bfqq);
-	soft_rt = bfqd->bfq_wr_max_softrt_rate > 0 &&
-		!BFQQ_TOTALLY_SEEKY(bfqq) &&
+	soft_rt = !BFQQ_TOTALLY_SEEKY(bfqq) &&
 		!in_burst &&
 		time_is_before_jiffies(bfqq->soft_rt_next_start) &&
 		bfqq->dispatched == 0 &&
@@ -4350,8 +4349,7 @@ void bfq_bfqq_expire(struct bfq_data *bfqd,
 	if (bfqd->low_latency && bfqq->wr_coeff == 1)
 		bfqq->last_wr_start_finish = jiffies;
 
-	if (bfqd->low_latency && bfqd->bfq_wr_max_softrt_rate > 0 &&
-	    RB_EMPTY_ROOT(&bfqq->sort_list)) {
+	if (bfqd->low_latency && RB_EMPTY_ROOT(&bfqq->sort_list)) {
 		/*
 		 * If we get here, and there are no outstanding
 		 * requests, then the request pattern is isochronous
-- 
2.30.0