linux-kernel - [PATCH 4/8] block, bfq: split also async bfq

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Message-Id: <20220623155335.6147-5-paolo.valente@linaro.org>
Date:   Thu, 23 Jun 2022 17:53:31 +0200
From:   Paolo Valente <paolo.valente@...aro.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        jack@...e.cz, andrea.righi@...onical.com, glen.valante@...aro.org,
        arie.vanderhoeven@...gate.com, Davide Zini <davidezini2@...il.com>,
        Paolo Valente <paolo.valente@...aro.org>
Subject: [PATCH 4/8] block, bfq: split also async bfq_queues on a per-actuator basis

From: Davide Zini <davidezini2@...il.com>

Similarly to sync bfq_queues, also async bfq_queues need to be split
on a per-actuator basis.

Signed-off-by: Paolo Valente <paolo.valente@...aro.org>
Signed-off-by: Davide Zini <davidezini2@...il.com>
---
 block/bfq-iosched.c | 41 +++++++++++++++++++++++------------------
 block/bfq-iosched.h |  8 ++++----
 2 files changed, 27 insertions(+), 22 deletions(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index fa24f9074e6f..acc2282cf196 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -2671,14 +2671,16 @@ static void bfq_bfqq_end_wr(struct bfq_queue *bfqq)
 void bfq_end_wr_async_queues(struct bfq_data *bfqd,
 			     struct bfq_group *bfqg)
 {
-	int i, j;
-
-	for (i = 0; i < 2; i++)
-		for (j = 0; j < IOPRIO_NR_LEVELS; j++)
-			if (bfqg->async_bfqq[i][j])
-				bfq_bfqq_end_wr(bfqg->async_bfqq[i][j]);
-	if (bfqg->async_idle_bfqq)
-		bfq_bfqq_end_wr(bfqg->async_idle_bfqq);
+	int i, j, k;
+
+	for (k = 0; k < BFQ_NUM_ACTUATORS; k++) {
+		for (i = 0; i < 2; i++)
+			for (j = 0; j < IOPRIO_NR_LEVELS; j++)
+				if (bfqg->async_bfqq[i][j][k])
+					bfq_bfqq_end_wr(bfqg->async_bfqq[i][j][k]);
+		if (bfqg->async_idle_bfqq[k])
+			bfq_bfqq_end_wr(bfqg->async_idle_bfqq[k]);
+	}
 }
 
 static void bfq_end_wr(struct bfq_data *bfqd)
@@ -5598,18 +5600,18 @@ static void bfq_init_bfqq(struct bfq_data *bfqd, struct bfq_queue *bfqq,
 
 static struct bfq_queue **bfq_async_queue_prio(struct bfq_data *bfqd,
 					       struct bfq_group *bfqg,
-					       int ioprio_class, int ioprio)
+					       int ioprio_class, int ioprio, int act_idx)
 {
 	switch (ioprio_class) {
 	case IOPRIO_CLASS_RT:
-		return &bfqg->async_bfqq[0][ioprio];
+		return &bfqg->async_bfqq[0][ioprio][act_idx];
 	case IOPRIO_CLASS_NONE:
 		ioprio = IOPRIO_BE_NORM;
 		fallthrough;
 	case IOPRIO_CLASS_BE:
-		return &bfqg->async_bfqq[1][ioprio];
+		return &bfqg->async_bfqq[1][ioprio][act_idx];
 	case IOPRIO_CLASS_IDLE:
-		return &bfqg->async_idle_bfqq;
+		return &bfqg->async_idle_bfqq[act_idx];
 	default:
 		return NULL;
 	}
@@ -5783,7 +5785,8 @@ static struct bfq_queue *bfq_get_queue(struct bfq_data *bfqd,
 
 	if (!is_sync) {
 		async_bfqq = bfq_async_queue_prio(bfqd, bfqg, ioprio_class,
-						  ioprio);
+						  ioprio,
+						  bfq_actuator_index(bfqd, bio));
 		bfqq = *async_bfqq;
 		if (bfqq)
 			goto out;
@@ -6998,13 +7001,15 @@ static void __bfq_put_async_bfqq(struct bfq_data *bfqd,
  */
 void bfq_put_async_queues(struct bfq_data *bfqd, struct bfq_group *bfqg)
 {
-	int i, j;
+	int i, j, k;
 
-	for (i = 0; i < 2; i++)
-		for (j = 0; j < IOPRIO_NR_LEVELS; j++)
-			__bfq_put_async_bfqq(bfqd, &bfqg->async_bfqq[i][j]);
+	for (k = 0; k < BFQ_NUM_ACTUATORS; k++) {
+		for (i = 0; i < 2; i++)
+			for (j = 0; j < IOPRIO_NR_LEVELS; j++)
+				__bfq_put_async_bfqq(bfqd, &bfqg->async_bfqq[i][j][k]);
 
-	__bfq_put_async_bfqq(bfqd, &bfqg->async_idle_bfqq);
+	__bfq_put_async_bfqq(bfqd, &bfqg->async_idle_bfqq[k]);
+	}
 }
 
 /*
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h
index e1ed18a9400d..8862c12e8031 100644
--- a/block/bfq-iosched.h
+++ b/block/bfq-iosched.h
@@ -961,8 +961,8 @@ struct bfq_group {
 
 	void *bfqd;
 
-	struct bfq_queue *async_bfqq[2][IOPRIO_NR_LEVELS];
-	struct bfq_queue *async_idle_bfqq;
+	struct bfq_queue *async_bfqq[2][IOPRIO_NR_LEVELS][BFQ_NUM_ACTUATORS];
+	struct bfq_queue *async_idle_bfqq[BFQ_NUM_ACTUATORS];
 
 	struct bfq_entity *my_entity;
 
@@ -978,8 +978,8 @@ struct bfq_group {
 	struct bfq_entity entity;
 	struct bfq_sched_data sched_data;
 
-	struct bfq_queue *async_bfqq[2][IOPRIO_NR_LEVELS];
-	struct bfq_queue *async_idle_bfqq;
+	struct bfq_queue *async_bfqq[2][IOPRIO_NR_LEVELS][BFQ_NUM_ACTUATORS];
+	struct bfq_queue *async_idle_bfqq[BFQ_NUM_ACTUATORS];
 
 	struct rb_root rq_pos_tree;
 };
-- 
2.20.1