linux-kernel - Re: Lockup on USB and block devices

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Date:   Mon, 14 Oct 2019 12:56:49 +0200
From:   Oliver Neukum <oneukum@...e.com>
To:     Steven Rostedt <rostedt@...dmis.org>, linux-block@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>, linux-usb@...r.kernel.org
Cc:     Jens Axboe <axboe@...nel.dk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: Lockup on USB and block devices

Am Dienstag, den 01.10.2019, 13:44 -0400 schrieb Steven Rostedt:
> Not sure who to blame, but my server locked up when upgraded (accessing
> volume group information), and echoing in "w" into sysrq-trigger showed
> a bit of information.
> 
> First, looking at my dmesg I see that my usb-storage is hung up, for
> whatever reason. Thus, this could be the source of all issues.

The reset of the device is hung. You may be hanging on dev_mutex.
Is this repeatable?

	Regards
		Oliver