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authorJan Kara <jack@suse.cz>2022-04-01 13:27:47 +0300
committerJens Axboe <axboe@kernel.dk>2022-04-18 04:34:25 +0300
commit5f550ede5edf846ecc0067be1ba80514e6fe7f8e (patch)
treef26e30540412f7a10fd25710d1dc0880a4e4527d /block
parentfc84e1f941b91221092da5b3102ec82da24c5673 (diff)
downloadlinux-5f550ede5edf846ecc0067be1ba80514e6fe7f8e.tar.xz
bfq: Remove pointless bfq_init_rq() calls
We call bfq_init_rq() from request merging functions where requests we get should have already gone through bfq_init_rq() during insert and anyway we want to do anything only if the request is already tracked by BFQ. So replace calls to bfq_init_rq() with RQ_BFQQ() instead to simply skip requests untracked by BFQ. We move bfq_init_rq() call in bfq_insert_request() a bit earlier to cover request merging and thus can transfer FIFO position in case of a merge. CC: stable@vger.kernel.org Tested-by: "yukuai (C)" <yukuai3@huawei.com> Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220401102752.8599-6-jack@suse.cz Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/bfq-iosched.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 19082e14f3c1..d7cf930b47bb 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -2497,8 +2497,6 @@ static int bfq_request_merge(struct request_queue *q, struct request **req,
return ELEVATOR_NO_MERGE;
}
-static struct bfq_queue *bfq_init_rq(struct request *rq);
-
static void bfq_request_merged(struct request_queue *q, struct request *req,
enum elv_merge type)
{
@@ -2507,7 +2505,7 @@ static void bfq_request_merged(struct request_queue *q, struct request *req,
blk_rq_pos(req) <
blk_rq_pos(container_of(rb_prev(&req->rb_node),
struct request, rb_node))) {
- struct bfq_queue *bfqq = bfq_init_rq(req);
+ struct bfq_queue *bfqq = RQ_BFQQ(req);
struct bfq_data *bfqd;
struct request *prev, *next_rq;
@@ -2559,8 +2557,8 @@ static void bfq_request_merged(struct request_queue *q, struct request *req,
static void bfq_requests_merged(struct request_queue *q, struct request *rq,
struct request *next)
{
- struct bfq_queue *bfqq = bfq_init_rq(rq),
- *next_bfqq = bfq_init_rq(next);
+ struct bfq_queue *bfqq = RQ_BFQQ(rq),
+ *next_bfqq = RQ_BFQQ(next);
if (!bfqq)
goto remove;
@@ -6129,6 +6127,8 @@ static inline void bfq_update_insert_stats(struct request_queue *q,
unsigned int cmd_flags) {}
#endif /* CONFIG_BFQ_CGROUP_DEBUG */
+static struct bfq_queue *bfq_init_rq(struct request *rq);
+
static void bfq_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
bool at_head)
{
@@ -6144,6 +6144,7 @@ static void bfq_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
bfqg_stats_update_legacy_io(q, rq);
#endif
spin_lock_irq(&bfqd->lock);
+ bfqq = bfq_init_rq(rq);
if (blk_mq_sched_try_insert_merge(q, rq, &free)) {
spin_unlock_irq(&bfqd->lock);
blk_mq_free_requests(&free);
@@ -6152,7 +6153,6 @@ static void bfq_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
trace_block_rq_insert(rq);
- bfqq = bfq_init_rq(rq);
if (!bfqq || at_head) {
if (at_head)
list_add(&rq->queuelist, &bfqd->dispatch);