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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 1 Mar 2019 10:40:16 -0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x21AeFVQ50724934 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 1 Mar 2019 10:40:15 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AEE45A4053; Fri, 1 Mar 2019 10:40:15 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BDCF6A404D; Fri, 1 Mar 2019 10:40:13 +0000 (GMT) Received: from rapoport-lnx (unknown [9.148.204.73]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Fri, 1 Mar 2019 10:40:13 +0000 (GMT) Date: Fri, 1 Mar 2019 12:40:11 +0200 From: Mike Rapoport To: Guillaume Tucker Cc: Dan Williams , Andrew Morton , Michal Hocko , Mark Brown , Tomeu Vizoso , Matt Hart , Stephen Rothwell , khilman@baylibre.com, enric.balletbo@collabora.com, Nicholas Piggin , Dominik Brodowski , Masahiro Yamada , Kees Cook , Adrian Reber , Linux Kernel Mailing List , Johannes Weiner , Linux MM , Mathieu Desnoyers , Richard Guy Briggs , "Peter Zijlstra (Intel)" , info@kernelci.org Subject: Re: next/master boot bisection: next-20190215 on beaglebone-black References: <5c6702da.1c69fb81.12a14.4ece@mx.google.com> <20190215104325.039dbbd9c3bfb35b95f9247b@linux-foundation.org> <20190215185151.GG7897@sirena.org.uk> <20190226155948.299aa894a5576e61dda3e5aa@linux-foundation.org> <20190228151438.fc44921e66f2f5d393c8d7b4@linux-foundation.org> <026b5082-32f2-e813-5396-e4a148c813ea@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <026b5082-32f2-e813-5396-e4a148c813ea@collabora.com> User-Agent: Mutt/1.5.24 (2015-08-30) X-TM-AS-GCONF: 00 x-cbid: 19030110-0012-0000-0000-000002FBB841 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19030110-0013-0000-0000-0000213367FA Message-Id: <20190301104011.GB5156@rapoport-lnx> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-03-01_09:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1903010075 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Mar 01, 2019 at 09:25:24AM +0100, Guillaume Tucker wrote: > On 01/03/2019 00:55, Dan Williams wrote: > > On Thu, Feb 28, 2019 at 3:14 PM Andrew Morton wrote: > >> > >> On Tue, 26 Feb 2019 16:04:04 -0800 Dan Williams wrote: > >> > >>> On Tue, Feb 26, 2019 at 4:00 PM Andrew Morton wrote: > >>>> > >>>> On Fri, 15 Feb 2019 18:51:51 +0000 Mark Brown wrote: > >>>> > >>>>> On Fri, Feb 15, 2019 at 10:43:25AM -0800, Andrew Morton wrote: > >>>>>> On Fri, 15 Feb 2019 10:20:10 -0800 (PST) "kernelci.org bot" wrote: > >>>>> > >>>>>>> Details: https://kernelci.org/boot/id/5c666ea959b514b017fe6017 > >>>>>>> Plain log: https://storage.kernelci.org//next/master/next-20190215/arm/multi_v7_defconfig+CONFIG_SMP=n/gcc-7/lab-collabora/boot-am335x-boneblack.txt > >>>>>>> HTML log: https://storage.kernelci.org//next/master/next-20190215/arm/multi_v7_defconfig+CONFIG_SMP=n/gcc-7/lab-collabora/boot-am335x-boneblack.html > >>>>> > >>>>>> Thanks. > >>>>> > >>>>>> But what actually went wrong? Kernel doesn't boot? > >>>>> > >>>>> The linked logs show the kernel dying early in boot before the console > >>>>> comes up so yeah. There should be kernel output at the bottom of the > >>>>> logs. > >>>> > >>>> I assume Dan is distracted - I'll keep this patchset on hold until we > >>>> can get to the bottom of this. > >>> > >>> Michal had asked if the free space accounting fix up addressed this > >>> boot regression? I was awaiting word on that. > >> > >> hm, does bot@kernelci.org actually read emails? Let's try info@ as well.. > > bot@kernelci.org is not person, it's a send-only account for > automated reports. So no, it doesn't read emails. > > I guess the tricky point here is that the authors of the commits > found by bisections may not always have the hardware needed to > reproduce the problem. So it needs to be dealt with on a > case-by-case basis: sometimes they do have the hardware, > sometimes someone else on the list or on CC does, and sometimes > it's better for the people who have access to the test lab which > ran the KernelCI test to deal with it. > > This case seems to fall into the last category. As I have access > to the Collabora lab, I can do some quick checks to confirm > whether the proposed patch does fix the issue. I hadn't realised > that someone was waiting for this to happen, especially as the > BeagleBone Black is a very common platform. Sorry about that, > I'll take a look today. > > It may be a nice feature to be able to give access to the > KernelCI test infrastructure to anyone who wants to debug an > issue reported by KernelCI or verify a fix, so they won't need to > have the hardware locally. Something to think about for the > future. Another thing to consider is adding "earlyprintk debug" to the kernel command line for the boot tests. > >> Is it possible to determine whether this regression is still present in > >> current linux-next? > > I'll try to re-apply the patch that caused the issue, then see if > the suggested change fixes it. As far as the current linux-next > master branch is concerned, KernelCI boot tests are passing fine > on that platform. > > Guillaume > -- Sincerely yours, Mike.