From mboxrd@z Thu Jan 1 00:00:00 1970 From: Krzysztof Kozlowski Subject: Re: Odroid U2 Kernel 4.7rc7+ Hang on reboot Date: Fri, 15 Jul 2016 13:35:03 +0200 Message-ID: <5788CA67.5090200@samsung.com> References: <1468525055.4843.4.camel@ndufresne.ca> <1468525558.4843.6.camel@ndufresne.ca> <5787EF8E.2010401@math.uni-bielefeld.de> <1468528408.4843.9.camel@ndufresne.ca> <578896DB.7060708@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mailout1.w1.samsung.com ([210.118.77.11]:23147 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932590AbcGOLfJ (ORCPT ); Fri, 15 Jul 2016 07:35:09 -0400 Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) by mailout1.w1.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0OAC00FS1TIH5460@mailout1.w1.samsung.com> for linux-samsung-soc@vger.kernel.org; Fri, 15 Jul 2016 12:35:05 +0100 (BST) In-reply-to: <578896DB.7060708@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: nicolas@ndufresne.ca, Tobias Jakobi , "linux-samsung-soc@vger.kernel.org" Cc: Javier Martinez Canillas On 07/15/2016 09:55 AM, Krzysztof Kozlowski wrote: >>> Nicolas Dufresne wrote: >>>> Le jeudi 14 juillet 2016 =C3=A0 15:37 -0400, Nicolas Dufresne a =C3= =A9crit : >>>>> Hi, >>>>> >>>>> I'm using the Odroid U2 to test some features implemented in >>>>> GStreamer. >>>>> The parts I need mostly works in mainline kernel, my main >>>>> annoyance >>>>> ist >>>>> that reboot hangs. >>>>> >>>>> Is this issue known ? I'm booting from SD card is that matters. >>>>> Any >>>>> advise would be appreciated. I'm not list member, so please keep >>>>> me >>>>> in >>>>> CC. I'm sharing my .config, in case that is my fault. >=20 > First of all - use just command "reboot" to restart. It should work. = If > it doesn't, please let us now. >=20 > I was able to reproduce your issue - OOPS in emergency restart - also= in > my configuration (U3 + eMMC + network boot). >=20 > It is weird... I'll take a look at it. Actually I did not encounter OOPS of yours. I was able to reproduce a failure to reboot on U3. XU3 reboots fine. It might be related to pwrse= q... The failure seems to be present for long time, at least since v4.2. I a= m in progress of testing more releases. ext4 backtrace present in your OOPs might be related to improper reboot= =2E Even for emergency reboot you should first sync, then remount ro and finally reboot (so sysrq: sub). Best Regards, Krzysztof