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Message-ID: <1571050609.19529.11.camel@suse.com>
Subject: Re: Lockup on USB and block devices
From:   Oliver Neukum <oneukum@suse.com>
To:     Steven Rostedt <rostedt@goodmis.org>, linux-block@vger.kernel.org,
        LKML <linux-kernel@vger.kernel.org>, linux-usb@vger.kernel.org
Cc:     Jens Axboe <axboe@kernel.dk>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date:   Mon, 14 Oct 2019 12:56:49 +0200
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References: <20191001134430.1f9c9c75@gandalf.local.home>
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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