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>

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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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10

block/bfq-cgroup.c

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1

block/bfq-iosched.h

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12

block/bfq-wf2q.c

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