diff options
| author | Yu Kuai <yukuai3@huawei.com> | 2022-09-16 09:19:38 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-11-01 14:09:44 +0100 |
| commit | 60a6e10c537a7459dd53882186bd16fff257fb03 (patch) | |
| tree | d25f98c14b4a0cc2cca985944c56dc263f908e36 /block/bfq-cgroup.c | |
| parent | block, bfq: support to track if bfqq has pending requests (diff) | |
| download | linux-60a6e10c537a7459dd53882186bd16fff257fb03.tar.xz linux-60a6e10c537a7459dd53882186bd16fff257fb03.zip | |
block, bfq: record how many queues have pending requests
Prepare to refactor the counting of 'num_groups_with_pending_reqs'.
Add a counter in bfq_group, update it while tracking if bfqq have pending
requests and when bfq_bfqq_move() is called.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Link: https://lore.kernel.org/r/20220916071942.214222-3-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-cgroup.c')
| -rw-r--r-- | block/bfq-cgroup.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c index 144bca006463..4c37398e0b99 100644 --- a/block/bfq-cgroup.c +++ b/block/bfq-cgroup.c @@ -552,6 +552,7 @@ static void bfq_pd_init(struct blkg_policy_data *pd) */ bfqg->bfqd = bfqd; bfqg->active_entities = 0; + bfqg->num_queues_with_pending_reqs = 0; bfqg->online = true; bfqg->rq_pos_tree = RB_ROOT; } @@ -641,6 +642,7 @@ void bfq_bfqq_move(struct bfq_data *bfqd, struct bfq_queue *bfqq, { struct bfq_entity *entity = &bfqq->entity; struct bfq_group *old_parent = bfqq_group(bfqq); + bool has_pending_reqs = false; /* * No point to move bfqq to the same group, which can happen when @@ -661,6 +663,11 @@ void bfq_bfqq_move(struct bfq_data *bfqd, struct bfq_queue *bfqq, */ bfqq->ref++; + if (entity->in_groups_with_pending_reqs) { + has_pending_reqs = true; + bfq_del_bfqq_in_groups_with_pending_reqs(bfqq); + } + /* If bfqq is empty, then bfq_bfqq_expire also invokes * bfq_del_bfqq_busy, thereby removing bfqq and its entity * from data structures related to current group. Otherwise we @@ -688,6 +695,9 @@ void bfq_bfqq_move(struct bfq_data *bfqd, struct bfq_queue *bfqq, /* pin down bfqg and its associated blkg */ bfqg_and_blkg_get(bfqg); + if (has_pending_reqs) + bfq_add_bfqq_in_groups_with_pending_reqs(bfqq); + if (bfq_bfqq_busy(bfqq)) { if (unlikely(!bfqd->nonrot_with_queueing)) bfq_pos_tree_add_move(bfqd, bfqq); |