From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jon Hunter Subject: Re: next/master boot: 273 boots: 63 failed, 209 passed with 1 untried/unknown (next-20171106) Date: Thu, 9 Nov 2017 15:23:59 +0000 Message-ID: <18ef379f-0c23-0cbf-4228-30d5c46c690f@nvidia.com> References: <5a0055f1.85a8500a.98d54.a4e4@mx.google.com> <20171106191713.d7jqg2b6zqchythw@sirena.co.uk> <20171107105501.7x74gdqzhr7uulp2@sirena.org.uk> <613bcd63-a215-acbe-9150-c1495f7604f6@collabora.com> <5740b853-4898-2ebc-f67d-0808d1b44c36@nvidia.com> <7cdfa633-d9c6-881a-ae5f-f94f7e6413ee@nvidia.com> <5f064e65-ee29-179b-8102-984d12d24d9d@collabora.com> <15792a16-6b57-a6ad-92dc-0ffaba0354db@nvidia.com> <1eb4e14f-4728-d4f7-95a6-0a6308760d7a@collabora.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Arnd Bergmann , Guillaume Tucker Cc: "kernelci.org bot" , Kernel Build Reports Mailman List , Mark Brown , "open list:TEGRA ARCHITECTURE SUPPORT" , Robin Murphy , Linux ARM List-Id: linux-tegra@vger.kernel.org On 09/11/17 13:17, Arnd Bergmann wrote: > On Thu, Nov 9, 2017 at 1:51 PM, Guillaume Tucker > wrote: >> On 09/11/17 11:29, Jon Hunter wrote: >>> >>> >>> On 09/11/17 10:43, Guillaume Tucker wrote: >>> >>> ... >>> >>>> I actually built these kernel revisions with module support >>>> disabled to speed up the builds, and no modules are being >>>> downloaded in the LAVA job. >>>> >>>> If you have a public URL with your known working kernel zImage >>>> and dtb, let me know so I could re-run the same test LAVA boot >>>> test to see if I get the same results as you (i.e. no hang). >>> >>> >>> I don't have a public URL for the zImage but I can definitely email it >>> to you. By the way, when booting I am setting 'init=/bin/bash' so no >>> start-up scripts are running. >> >> >> Thanks, I tried your binary and it booted fine. I built >> next-20171109 again with and without loadable module support >> enabled and it fails with it disabled but passes with it >> enabled (even without actually loading any modules): >> >> * with CONFIG_MODULES disabled (fails): >> https://lava.collabora.co.uk/scheduler/job/981215 >> >> * with plain multi_v7_defconfig and no modules loaded (passes): >> https://lava.collabora.co.uk/scheduler/job/981217 >> >> >> So I guess this means disabling loadable modules support has some >> interesting side-effects that cause the kernel to crash. I think >> the kci builds all leave modules enabled with multi_v7_defconfig, >> so the failing boots must be due to something else. Taking >> another look at the failing kci boots now... > > The one thing that comes to mind that happened recently with > modules is > > 371435f78e9e ("kernel debug: support resetting WARN_ONCE for all architectures") > > Can you try reverting this? It's probably something else, but I'd like > to rule it out. I have been able to reproduce the problem by disabling support for loadable modules on both Tegra124 Nyan-Big and Jetson TK1. Disabling DRM_NOUVEAU appears to avoid the problem. Guillaume can you try the same? Cheers Jon -- nvpublic