From owner-freebsd-questions@freebsd.org Wed Feb 14 00:26:46 2018 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id BF58EF0F687 for ; Wed, 14 Feb 2018 00:26:46 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.17.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "mout.kundenserver.de", Issuer "TeleSec ServerPass DE-2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 215797A7A1 for ; Wed, 14 Feb 2018 00:26:45 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from r56.edvax.de ([92.195.213.55]) by mrelayeu.kundenserver.de (mreue105 [212.227.15.183]) with ESMTPA (Nemesis) id 0M6EXa-1eaFEL0ANW-00yAeC; Wed, 14 Feb 2018 01:13:35 +0100 Date: Wed, 14 Feb 2018 01:13:33 +0100 From: Polytropon To: Valeri Galtsev Cc: FreeBSD Mailing List Subject: Re: OT: just crashed two FreeBSD-11.1-RELEASE machines Message-Id: <20180214011333.23d616b9.freebsd@edvax.de> In-Reply-To: References: Reply-To: Polytropon Organization: EDVAX X-Mailer: Sylpheed 3.1.1 (GTK+ 2.24.5; i386-portbld-freebsd8.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K0:oSmELsyBBdxBJ5ijKzX8J1k5BVBnQpZcZAtH4ZTB5eRsL4sJzZg vkDFCuoGn+rO7MZ14PFzZCeAJicqAGp7BtisUzY0Pb7sKkoLEbvdz4LzNu3f9rljQFnA12H M7QrAbT+6hRjVp5Join24idwMcw5K3UVZSp5C8QESfIObHcsWlV8HYCIMP2Eg2ibTekzR++ wHSAe8ic1aXRqC97y7V5w== X-UI-Out-Filterresults: notjunk:1;V01:K0:qgrZY7/6si4=:KZwZNh07MvkiCkSy46K3hS 9VUgXxI0Iw8rL3fCmPYal7kE11W8iisOsC0/7TIDCiK/a0lxq31VOfT75TQS8PAgUV8gVAMO+ GYBqKtdujowu3EvhBNt0s5jeCcHI0MEXdOSOU18O0BiLl9qeyyw7hEs/0aak2OcIjrwE4vkHk 3ErMU61kjNc4SKIjOV7hFYpu6pZkU50JoKQ51Qvmj++lgyIUF6sVhbGfYiWwXsj/E1xI2TXH+ kxq+NEIN+AHUugcHZv6KeKn/L5/7TtOTDDhNUzSu9V/dJPWnc4jRwzjoeiuQjLyW32eWMGybG oaEHw76t9ZVxzFYVxOUiV37pSN+6ckWdf80w4MaiEVRSKIPoIe9X9mNRL9FrJFmItBxpw2xB7 /aVSX0KwOsKZgVzljhxjOqcQlJdrUtUk7ruBcNEGlqXmwLvObuiu2UKH7YBNwaCVU95StSGE8 VtHqKQb0Bh46gTAfjtt8ZiGwKFJ0ZwSor2LICVgOrqm856E9Kg0/PDJY9K6FCnJotiKx8W7E8 IuGObxAE2F1S4rT4Tw87KpxF2c+UzphVtEO+E8GUkfpiXoapglAt9g4IWnYnWGnItW3dvaE0p mg7DHsEIqUVc5l4hiqSs259KgzgvVUTNbj8KWh1zVkiPH0x4CU/OOUuWpOpINAZ//mlXtRSfc 6tBgxVv1N8vaNVnHcH8xWpdcphd8ik/1IW/9MjomJ6f59sa3VmkKCUBIzD8V4Lv3paEBggfoO eVLg40alUUy4tBpocP6EpjPz6D9C8pU3sxKUbrzDoFv13E0vrWzab4m/wQs= X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Feb 2018 00:26:46 -0000 On Tue, 13 Feb 2018 16:56:12 -0600, Valeri Galtsev wrote: > I just crushed two (one at a time) FreeBSD-11.1-RELEASE machines. I > simply plugged my Sony video camera which was in the mode of exporting > its (msdos) filesystems over USB. Both machines have decent hardware, > plenty of resources. Regular user was logged in to X11. One of the > filesystems was mounted (the one holding AVCHD videos), and two seconds > later the machine started booting (like "crashed"). > > And now I'm sitting in prostration and thinking: What is that I will do > next? Gather debugging data. Reduce automatisms and check each step manually. Try to find out the exact "thing" that brought down the system (it's hard to tell when X is running and doing its "magic"). Many years ago, I had a similar problem, but when _detaching_ the camera from the system (internal filesystem was already unmounted, and previous access to it went as expected)... This was, I think, in FreeBSD 5 times, and after a system update, the problem went away. So I never found out what the actual problem was - but it could be reproduced any time, even in single user mode: insert USB plug, system recognizes da0 device (as intended), wait a few seconds, remove USB plug, system panic, kernel crash. After update: regular "disconnect" message, nothing else, system kept running. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...