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Tue, 26 Jan 2021 16:38:01 +0000 (GMT) Received: from linux.ibm.com (unknown [9.145.26.126]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 26 Jan 2021 16:38:01 +0000 (GMT) Date: Tue, 26 Jan 2021 18:37:59 +0200 From: Mike Rapoport To: Chris Wilson Cc: Linus Torvalds , Andrew Morton , Linux Kernel Mailing List Subject: Re: Linux 5.11-rc5 Message-ID: <20210126163759.GD196782@linux.ibm.com> References: <161160687463.28991.354987542182281928@build.alporthouse.com> <20210125210456.GA196782@linux.ibm.com> <161160923954.29150.8571056944016500691@build.alporthouse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <161160923954.29150.8571056944016500691@build.alporthouse.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2021-01-26_08:2021-01-26,2021-01-26 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 malwarescore=0 mlxscore=0 adultscore=0 spamscore=0 phishscore=0 suspectscore=0 mlxlogscore=999 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101260085 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jan 25, 2021 at 09:13:59PM +0000, Chris Wilson wrote: > Quoting Mike Rapoport (2021-01-25 21:04:56) > > On Mon, Jan 25, 2021 at 08:34:34PM +0000, Chris Wilson wrote: > > > Quoting Linus Torvalds (2021-01-25 01:06:40) > > > > Mike Rapoport (3): > > > ... > > > > mm: fix initialization of struct page for holes in memory layout > > > > > > We have half a dozen or so different machines in CI that are silently > > > failing to boot, that we believe is bisected to this patch. > > > > > > 17:56 tsa : ickle: dolphin: I hit the following patch in my bisection, and the hang is also dependent on kconfig > > > 17:56 tsa : first bad commit: [d3921cb8be29ce5668c64e23ffdaeec5f8c69399] mm: fix initialization of struct page for holes in > > > memory layout > > > 17:57 tsa : couldn't reproduce on older CI kconfig, current one does it > > > https://gitlab.freedesktop.org/gfx-ci/i915-infra/-/blob/master/kconfig/debug > > > > > > Here's a boot dmesg from some affected machines from just before the merge > > > with rc5: > > > https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9676/shard-skl1/boot18.txt > > > https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9676/fi-skl-6600u/boot.html > > > https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9676/fi-bsw-cyan/boot.html > > > https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9676/fi-bdw-samus/boot.html > > > > Is there any way to get early console from these machines? > > 12:16 tsa : none of those have good hook for serial > > Nothing on the console and no serial console option, and panics before > netconsole. > > Maybe some early_printk and boot_delay if you think there's something to > see with those, but I'll have to ask Tomi nicely tomorrow. I think there could be an early panic at some point of mm initialization. So if it was possible to see early printks somehow that would have been helpful. > -Chris -- Sincerely yours, Mike.