From cc56694f132a8f5fa9334e3afe990de8c3378866 Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Mon, 17 Dec 2018 09:46:00 +0800 Subject: blk-mq-debugfs: support rq_qos blk-mq-debugfs has been proved as very helpful for debug some tough issues, such as IO hang. We have seen blk-wbt related IO hang several times, even inside Red Hat BZ, there is such report not sovled yet, so this patch adds support debugfs on rq_qos. Cc: Bart Van Assche Cc: Omar Sandoval Cc: Christoph Hellwig Cc: Josef Bacik Signed-off-by: Ming Lei Signed-off-by: Jens Axboe --- block/blk-mq-debugfs.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'block/blk-mq-debugfs.h') diff --git a/block/blk-mq-debugfs.h b/block/blk-mq-debugfs.h index a9160be12be0..8c9012a578c1 100644 --- a/block/blk-mq-debugfs.h +++ b/block/blk-mq-debugfs.h @@ -31,6 +31,10 @@ void blk_mq_debugfs_unregister_sched(struct request_queue *q); int blk_mq_debugfs_register_sched_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx); void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx); + +int blk_mq_debugfs_register_rqos(struct rq_qos *rqos); +void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos); +void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q); #else static inline int blk_mq_debugfs_register(struct request_queue *q) { @@ -78,6 +82,19 @@ static inline int blk_mq_debugfs_register_sched_hctx(struct request_queue *q, static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx) { } + +static inline int blk_mq_debugfs_register_rqos(struct rq_qos *rqos) +{ + return 0; +} + +static inline void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos) +{ +} + +static inline void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q) +{ +} #endif #ifdef CONFIG_BLK_DEBUG_FS_ZONED -- cgit v1.2.3-59-g8ed1b