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| author | Yu Kuai <yukuai3@huawei.com> | 2022-10-19 20:15:18 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-10-23 18:59:17 -0600 |
| commit | 671fae5e51297fc76b3758ca2edd514858734a6a (patch) | |
| tree | a7f429a319b75d06d43e3d4d757e2f2f664fbceb /block/blk-mq.c | |
| parent | 181d06637451b5348d746039478e71fa53dfbff6 (diff) | |
| download | lwn-671fae5e51297fc76b3758ca2edd514858734a6a.tar.gz lwn-671fae5e51297fc76b3758ca2edd514858734a6a.zip | |
blk-wbt: don't enable throttling if default elevator is bfq
Commit b5dc5d4d1f4f ("block,bfq: Disable writeback throttling") tries to
disable wbt for bfq, it's done by calling wbt_disable_default() in
bfq_init_queue(). However, wbt is still enabled if default elevator is
bfq:
device_add_disk
elevator_init_mq
bfq_init_queue
wbt_disable_default -> done nothing
blk_register_queue
wbt_enable_default -> wbt is enabled
Fix the problem by adding a new flag ELEVATOR_FLAG_DISBALE_WBT, bfq
will set the flag in bfq_init_queue, and following wbt_enable_default()
won't enable wbt while the flag is set.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20221019121518.3865235-7-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
0 files changed, 0 insertions, 0 deletions