diff options
| author |   Jan Kara <jack@suse.cz> | 2022-04-01 12:27:44 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2022-04-17 19:34:16 -0600 |
| commit | 3bc5e683c67d94bd839a1da2e796c15847b51b69 (patch) | |
| tree | 6c819721b157bc4cdc26027b50460f631a086072 /block/bfq-iosched.h | |
| parent | bfq: Avoid merging queues with different parents (diff) | |
| download | linux-dev-3bc5e683c67d94bd839a1da2e796c15847b51b69.tar.xz linux-dev-3bc5e683c67d94bd839a1da2e796c15847b51b69.zip | |
bfq: Split shared queues on move between cgroups
When bfqq is shared by multiple processes it can happen that one of the
processes gets moved to a different cgroup (or just starts submitting IO
for different cgroup). In case that happens we need to split the merged
bfqq as otherwise we will have IO for multiple cgroups in one bfqq and
we will just account IO time to wrong entities etc.
Similarly if the bfqq is scheduled to merge with another bfqq but the
merge didn't happen yet, cancel the merge as it need not be valid
anymore.
CC: stable@vger.kernel.org
Fixes: e21b7a0b9887 ("block, bfq: add full hierarchical scheduling and cgroups support")
Tested-by: "yukuai (C)" <yukuai3@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220401102752.8599-3-jack@suse.cz
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-iosched.h')
| -rw-r--r-- | block/bfq-iosched.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h index 3b83e3d1c2e5..a56763045d19 100644 --- a/block/bfq-iosched.h +++ b/block/bfq-iosched.h @@ -979,6 +979,7 @@ void bfq_weights_tree_remove(struct bfq_data *bfqd, void bfq_bfqq_expire(struct bfq_data *bfqd, struct bfq_queue *bfqq, bool compensate, enum bfqq_expiration reason); void bfq_put_queue(struct bfq_queue *bfqq); +void bfq_put_cooperator(struct bfq_queue *bfqq); void bfq_end_wr_async_queues(struct bfq_data *bfqd, struct bfq_group *bfqg); void bfq_release_process_ref(struct bfq_data *bfqd, struct bfq_queue *bfqq); void bfq_schedule_dispatch(struct bfq_data *bfqd); |