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From: Bart Van Assche <bvanassche@acm.org>
To: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
	Jaegeuk Kim <jaegeuk@kernel.org>,
	Damien Le Moal <damien.lemoal@wdc.com>,
	Niklas Cassel <Niklas.Cassel@wdc.com>,
	Hannes Reinecke <hare@suse.de>
Subject: Re: [PATCH v2 4/4] block/mq-deadline: Prioritize high-priority requests
Date: Fri, 25 Mar 2022 10:05:43 -0700	[thread overview]
Message-ID: <180dc22b-4fee-93c2-9813-1b4f109b5dc7@acm.org> (raw)
In-Reply-To: <Yj22kLrsw+z7sj7R@pengutronix.de>

On 3/25/22 05:33, Oleksij Rempel wrote:
> I have regression on iMX6 + USB storage device with this patch.
> After plugging USB Flash driver (in my case USB3 Intenso 32GB) and
> running mount /dev/sda1 /mnt, the command will never exit.
> 
> Reverting this patchs (322cff70d46) on top of v5.17 solves it for me.
> 
> How can I help you to debug this issue?

That is unexpected. Is there perhaps something special about the USB
stick for which the hang occurs, e.g. the queue depth it supports is
low? Can you please share the output of the following commands after
having inserted the USB stick that triggers the hang?

(cd /sys/class && grep -aH . scsi_host/*/can_queue scsi_device/*/device/{blacklist,inquiry,model,queue*,vendor}) | sort

Thanks,

Bart.


  parent reply	other threads:[~2022-03-25 17:05 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-27 22:03 [PATCH v2 0/4] Restore I/O priority support in the mq-deadline scheduler Bart Van Assche
2021-09-27 22:03 ` [PATCH v2 1/4] block/mq-deadline: Improve request accounting further Bart Van Assche
2021-09-28  5:45   ` Hannes Reinecke
2021-09-27 22:03 ` [PATCH v2 2/4] block/mq-deadline: Add an invariant check Bart Van Assche
2021-09-28  5:47   ` Hannes Reinecke
2021-09-27 22:03 ` [PATCH v2 3/4] block/mq-deadline: Stop using per-CPU counters Bart Van Assche
2021-09-28  5:51   ` Hannes Reinecke
2021-09-28 17:35     ` Bart Van Assche
2021-09-27 22:03 ` [PATCH v2 4/4] block/mq-deadline: Prioritize high-priority requests Bart Van Assche
2021-09-27 22:53   ` Damien Le Moal
2021-09-27 23:12     ` Bart Van Assche
2021-09-28  5:53   ` Hannes Reinecke
2021-09-28 10:36   ` Niklas Cassel
2022-03-25 12:33   ` Oleksij Rempel
2022-03-25 13:07     ` Oleksij Rempel
2022-03-25 17:05     ` Bart Van Assche [this message]
2022-03-26  8:57       ` Oleksij Rempel
2022-03-28  2:20         ` Bart Van Assche
2022-03-28 22:24           ` Bart Van Assche
2022-03-29  4:49           ` Bart Van Assche
2021-09-27 23:14 ` [PATCH v2 0/4] Restore I/O priority support in the mq-deadline scheduler Jens Axboe

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