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block, bfq: record how many queues have pending requests

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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>
This commit is contained in:
Yu Kuai
2022-09-16 15:19:38 +08:00
committed by Jens Axboe
parent 3d89bd12d3
commit 60a6e10c53
3 changed files with 21 additions and 2 deletions
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12
block/bfq-wf2q.c
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@@ -1650,16 +1650,24 @@ void bfq_add_bfqq_in_groups_with_pending_reqs(struct bfq_queue *bfqq)
{
struct bfq_entity *entity = &bfqq->entity;
if (!entity->in_groups_with_pending_reqs)
if (!entity->in_groups_with_pending_reqs) {
entity->in_groups_with_pending_reqs = true;
#ifdef CONFIG_BFQ_GROUP_IOSCHED
bfqq_group(bfqq)->num_queues_with_pending_reqs++;
#endif
}
}
void bfq_del_bfqq_in_groups_with_pending_reqs(struct bfq_queue *bfqq)
{
struct bfq_entity *entity = &bfqq->entity;
if (entity->in_groups_with_pending_reqs)
if (entity->in_groups_with_pending_reqs) {
entity->in_groups_with_pending_reqs = false;
#ifdef CONFIG_BFQ_GROUP_IOSCHED
bfqq_group(bfqq)->num_queues_with_pending_reqs--;
#endif
}
}
/*