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| author | Jan Kara <jack@suse.cz> | 2022-04-01 12:27:48 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-04-17 19:34:27 -0600 |
| commit | 09f871868080c33992cd6a9b72a5ca49582578fa (patch) | |
| tree | a3b0638b2025c12f20a24be5eae27860c5d366f1 /block/bfq-iosched.h | |
| parent | 5f550ede5edf846ecc0067be1ba80514e6fe7f8e (diff) | |
| download | lwn-09f871868080c33992cd6a9b72a5ca49582578fa.tar.gz lwn-09f871868080c33992cd6a9b72a5ca49582578fa.zip | |
bfq: Track whether bfq_group is still online
Track whether bfq_group is still online. We cannot rely on
blkcg_gq->online because that gets cleared only after all policies are
offlined and we need something that gets updated already under
bfqd->lock when we are cleaning up our bfq_group to be able to guarantee
that when we see online bfq_group, it will stay online while we are
holding bfqd->lock lock.
CC: stable@vger.kernel.org
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/20220401102752.8599-7-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 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h index a56763045d19..4664e2f3e828 100644 --- a/block/bfq-iosched.h +++ b/block/bfq-iosched.h @@ -928,6 +928,8 @@ struct bfq_group { /* reference counter (see comments in bfq_bic_update_cgroup) */ int ref; + /* Is bfq_group still online? */ + bool online; struct bfq_entity entity; struct bfq_sched_data sched_data; |