diff options
| author | John Garry <john.garry@huawei.com> | 2021-10-18 17:41:23 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-10-21 08:21:52 -0600 |
| commit | 0994c64eb4159ba019e7fedc7ba0dd6a69235b40 (patch) | |
| tree | 3e754f29893f5fa6d13cb5bb4ec9b6eb5d6001af /block/blk-mq-tag.c | |
| parent | 008f75a20e7072d0840ec323c39b42206f3fa8a0 (diff) | |
blk-mq: Fix blk_mq_tagset_busy_iter() for shared tags
Since it is now possible for a tagset to share a single set of tags, the
iter function should not re-iter the tags for the count of #hw queues in
that case. Rather it should just iter once.
Fixes: e155b0c238b2 ("blk-mq: Use shared tags for shared sbitmap support")
Reported-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Tested-by: Kashyap Desai <kashyap.desai@broadcom.com>
Link: https://lore.kernel.org/r/1634550083-202815-1-git-send-email-john.garry@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq-tag.c')
| -rw-r--r-- | block/blk-mq-tag.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index b94c3e8ef392..995336abee33 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -399,9 +399,12 @@ void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn, void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, busy_tag_iter_fn *fn, void *priv) { - int i; + unsigned int flags = tagset->flags; + int i, nr_tags; + + nr_tags = blk_mq_is_shared_tags(flags) ? 1 : tagset->nr_hw_queues; - for (i = 0; i < tagset->nr_hw_queues; i++) { + for (i = 0; i < nr_tags; i++) { if (tagset->tags && tagset->tags[i]) __blk_mq_all_tag_iter(tagset->tags[i], fn, priv, BT_TAG_ITER_STARTED); |