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| author | Christoph Hellwig <hch@lst.de> | 2022-11-01 16:00:47 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-11-02 08:35:34 -0600 |
| commit | 80bd4a7aab4c9ce59bf5e35fdf52aa23d8a3c9f5 (patch) | |
| tree | 21d1dd0e8d5caf7c99cdeaccf55ac0cd866de799 /include/linux/blk-mq.h | |
| parent | 8537380bb9882c201db60a1eb201aac6e74083e8 (diff) | |
| download | lwn-80bd4a7aab4c9ce59bf5e35fdf52aa23d8a3c9f5.tar.gz lwn-80bd4a7aab4c9ce59bf5e35fdf52aa23d8a3c9f5.zip | |
blk-mq: move the srcu_struct used for quiescing to the tagset
All I/O submissions have fairly similar latencies, and a tagset-wide
quiesce is a fairly common operation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Chao Leng <lengchao@huawei.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20221101150050.3510-12-hch@lst.de
[axboe: fix whitespace]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blk-mq.h')
| -rw-r--r-- | include/linux/blk-mq.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 569053ed959d..f059edebb11d 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -7,6 +7,7 @@ #include <linux/lockdep.h> #include <linux/scatterlist.h> #include <linux/prefetch.h> +#include <linux/srcu.h> struct blk_mq_tags; struct blk_flush_queue; @@ -500,6 +501,8 @@ enum hctx_type { * @tag_list_lock: Serializes tag_list accesses. * @tag_list: List of the request queues that use this tag set. See also * request_queue.tag_set_list. + * @srcu: Use as lock when type of the request queue is blocking + * (BLK_MQ_F_BLOCKING). */ struct blk_mq_tag_set { struct blk_mq_queue_map map[HCTX_MAX_TYPES]; @@ -520,6 +523,7 @@ struct blk_mq_tag_set { struct mutex tag_list_lock; struct list_head tag_list; + struct srcu_struct *srcu; }; /** |