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| author | Yu Kuai <yukuai3@huawei.com> | 2022-03-18 14:01:44 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-03-18 16:57:56 +0100 |
| commit | 8f9e7b65f833cb9a4b2e2f54a049d74df394d906 (patch) | |
| tree | 53ea2561819061d557497972434541c212a7c2a2 /block/blk-throttle.h | |
| parent | block: let blkcg_gq grab request queue's refcnt (diff) | |
| download | linux-8f9e7b65f833cb9a4b2e2f54a049d74df394d906.tar.xz linux-8f9e7b65f833cb9a4b2e2f54a049d74df394d906.zip | |
block: cancel all throttled bios in del_gendisk()
Throttled bios can't be issued after del_gendisk() is done, thus
it's better to cancel them immediately rather than waiting for
throttle is done.
For example, if user thread is throttled with low bps while it's
issuing large io, and the device is deleted. The user thread will
wait for a long time for io to return.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220318130144.1066064-4-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-throttle.h')
| -rw-r--r-- | block/blk-throttle.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/block/blk-throttle.h b/block/blk-throttle.h index b23a9f3abb82..c1b602996127 100644 --- a/block/blk-throttle.h +++ b/block/blk-throttle.h @@ -56,6 +56,7 @@ enum tg_state_flags { THROTL_TG_PENDING = 1 << 0, /* on parent's pending tree */ THROTL_TG_WAS_EMPTY = 1 << 1, /* bio_lists[] became non-empty */ THROTL_TG_HAS_IOPS_LIMIT = 1 << 2, /* tg has iops limit */ + THROTL_TG_CANCELING = 1 << 3, /* starts to cancel bio */ }; enum { @@ -162,11 +163,13 @@ static inline int blk_throtl_init(struct request_queue *q) { return 0; } static inline void blk_throtl_exit(struct request_queue *q) { } static inline void blk_throtl_register_queue(struct request_queue *q) { } static inline bool blk_throtl_bio(struct bio *bio) { return false; } +static inline void blk_throtl_cancel_bios(struct request_queue *q) { } #else /* CONFIG_BLK_DEV_THROTTLING */ int blk_throtl_init(struct request_queue *q); void blk_throtl_exit(struct request_queue *q); void blk_throtl_register_queue(struct request_queue *q); bool __blk_throtl_bio(struct bio *bio); +void blk_throtl_cancel_bios(struct request_queue *q); static inline bool blk_throtl_bio(struct bio *bio) { struct throtl_grp *tg = blkg_to_tg(bio->bi_blkg); |