From: Ming Lei <ming.lei@redhat.com>
To: Yu Kuai <yukuai@fnnas.com>
Cc: axboe@kernel.dk, linux-block@vger.kernel.org, tj@kernel.org,
nilay@linux.ibm.com
Subject: Re: [PATCH v5 03/13] blk-mq-debugfs: factor out a helper to register debugfs for all rq_qos
Date: Thu, 18 Dec 2025 19:06:18 +0800 [thread overview]
Message-ID: <aUPgKnROy8SYT0RE@fedora> (raw)
In-Reply-To: <20251214101409.1723751-4-yukuai@fnnas.com>
On Sun, Dec 14, 2025 at 06:13:58PM +0800, Yu Kuai wrote:
> There is already a helper blk_mq_debugfs_register_rqos() to register
> one rqos, however this helper is called synchronously when the rqos is
> created with queue frozen.
>
> Prepare to fix possible deadlock to create blk-mq debugfs entries while
> queue is still frozen.
>
> Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Thanks,
Ming
next prev parent reply other threads:[~2025-12-18 11:06 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-14 10:13 [PATCH v5 00/13] blk-mq: fix possible deadlocks Yu Kuai
2025-12-14 10:13 ` [PATCH v5 01/13] blk-wbt: factor out a helper wbt_set_lat() Yu Kuai
2025-12-16 10:19 ` Ming Lei
2025-12-18 14:18 ` Nilay Shroff
2025-12-14 10:13 ` [PATCH v5 02/13] blk-wbt: fix possible deadlock to nest pcpu_alloc_mutex under q_usage_counter Yu Kuai
2025-12-16 11:03 ` Ming Lei
2025-12-16 11:29 ` Yu Kuai
2025-12-18 14:20 ` Nilay Shroff
2025-12-14 10:13 ` [PATCH v5 03/13] blk-mq-debugfs: factor out a helper to register debugfs for all rq_qos Yu Kuai
2025-12-18 11:06 ` Ming Lei [this message]
2025-12-18 14:28 ` Nilay Shroff
2025-12-14 10:13 ` [PATCH v5 04/13] blk-rq-qos: fix possible debugfs_mutex deadlock Yu Kuai
2025-12-18 11:11 ` Ming Lei
2025-12-18 14:33 ` Nilay Shroff
2025-12-14 10:14 ` [PATCH v5 05/13] blk-mq-debugfs: make blk_mq_debugfs_register_rqos() static Yu Kuai
2025-12-18 14:52 ` Nilay Shroff
2025-12-25 9:30 ` Yu Kuai
2025-12-14 10:14 ` [PATCH v5 06/13] blk-mq-debugfs: warn about possible deadlock Yu Kuai
2025-12-18 18:26 ` Nilay Shroff
2025-12-25 9:37 ` Yu Kuai
2025-12-14 10:14 ` [PATCH v5 07/13] blk-throttle: convert to GFP_NOIO in blk_throtl_init() Yu Kuai
2025-12-14 10:14 ` [PATCH v5 08/13] block/blk-rq-qos: add a new helper rq_qos_add_frozen() Yu Kuai
2025-12-14 10:14 ` [PATCH v5 09/13] blk-wbt: fix incorrect lock order for rq_qos_mutex and freeze queue Yu Kuai
2025-12-14 10:14 ` [PATCH v5 10/13] blk-iocost: " Yu Kuai
2025-12-14 10:14 ` [PATCH v5 11/13] blk-iolatency: " Yu Kuai
2025-12-14 10:14 ` [PATCH v5 12/13] blk-throttle: remove useless queue frozen Yu Kuai
2025-12-14 10:14 ` [PATCH v5 13/13] block/blk-rq-qos: cleanup rq_qos_add() Yu Kuai
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