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From: Jens Axboe <axboe@kernel.dk>
To: Tian Lan <tilan7663@gmail.com>
Cc: horms@kernel.org, linux-block@vger.kernel.org, lkp@intel.com,
	 llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
	tian.lan@twosigma.com
Subject: Re: [PATCH 1/1] blk-mq: fix blk_mq_hw_ctx active request accounting
Date: Sat, 03 Jun 2023 17:20:14 -0600	[thread overview]
Message-ID: <168583441458.548598.9269465063341391809.b4-ty@kernel.dk> (raw)
In-Reply-To: <20230513221227.497327-1-tilan7663@gmail.com>


On Sat, 13 May 2023 18:12:27 -0400, Tian Lan wrote:
> The nr_active counter continues to increase over time which causes the
> blk_mq_get_tag to hang until the thread is rescheduled to a different
> core despite there are still tags available.
> 
> kernel-stack
> 
>   INFO: task inboundIOReacto:3014879 blocked for more than 2 seconds
>   Not tainted 6.1.15-amd64 #1 Debian 6.1.15~debian11
>   "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>   task:inboundIOReacto state:D stack:0  pid:3014879 ppid:4557 flags:0x00000000
>     Call Trace:
>     <TASK>
>     __schedule+0x351/0xa20
>     scheduler+0x5d/0xe0
>     io_schedule+0x42/0x70
>     blk_mq_get_tag+0x11a/0x2a0
>     ? dequeue_task_stop+0x70/0x70
>     __blk_mq_alloc_requests+0x191/0x2e0
> 
> [...]

Applied, thanks!

[1/1] blk-mq: fix blk_mq_hw_ctx active request accounting
      commit: ddad59331a4e16088468ca0ad228a9fe32d7955a

Best regards,
-- 
Jens Axboe




  parent reply	other threads:[~2023-06-03 23:20 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-13 14:12 [PATCH 1/1] blk-mq: fix blk_mq_hw_ctx active request accounting Tian Lan
2023-05-13 16:41 ` kernel test robot
2023-05-13 16:41 ` kernel test robot
2023-05-13 19:05   ` Tian Lan
2023-05-13 20:54     ` Simon Horman
2023-05-13 21:15       ` Jens Axboe
2023-05-13 22:11         ` Tian Lan
2023-05-14  1:39           ` Jens Axboe
2023-05-15 12:28             ` Tian Lan
2023-05-13 22:12         ` Tian Lan
2023-05-14  1:52           ` Jens Axboe
2023-05-14 12:20             ` Ming Lei
2023-06-03 22:39             ` [PATCH] " Tian Lan
2023-06-04  0:47               ` Ming Lei
2023-06-03 22:39             ` [PATCH 1/1] " Tian Lan
2023-05-14 14:22           ` Ming Lei
2023-05-14 14:28             ` Tian Lan
2023-05-14 14:53             ` [PATCH] " Tian Lan
2023-05-15  5:54               ` Hannes Reinecke
2023-05-15 12:26                 ` Tian Lan
2023-05-25  2:12                   ` Ming Lei
2023-06-03 23:20           ` Jens Axboe [this message]
2023-05-14 12:08     ` [PATCH 1/1] " Ming Lei
2023-05-14 14:12       ` Tian Lan
2023-05-14 14:15       ` Ming Lei
2023-05-13 19:11   ` Tian Lan
2023-05-13 16:52 ` Jens Axboe

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