From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0CD76C433DB for ; Thu, 4 Feb 2021 15:55:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD83A64F5C for ; Thu, 4 Feb 2021 15:55:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237429AbhBDPzw (ORCPT ); Thu, 4 Feb 2021 10:55:52 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:49260 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237231AbhBDPyP (ORCPT ); Thu, 4 Feb 2021 10:54:15 -0500 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: gtucker) with ESMTPSA id EF8D01F463D3 Subject: Re: next/master bisection: baseline.login on rk3288-rock2-square To: Ard Biesheuvel Cc: Russell King - ARM Linux admin , Geert Uytterhoeven , Linux Kernel Mailing List , Linus Walleij , Linux ARM , Nicolas Pitre , "kernelci-results@groups.io" , clang-built-linux , Nick Desaulniers References: <601b773a.1c69fb81.9f381.a32a@mx.google.com> <6c65bcef-d4e7-25fa-43cf-2c435bb61bb9@collabora.com> <20210204100601.GT1463@shell.armlinux.org.uk> <46373679-a149-8a3d-e914-780e4c6ff8be@collabora.com> From: Guillaume Tucker Message-ID: <7c685184-8688-9319-075b-66133cb0b0c3@collabora.com> Date: Thu, 4 Feb 2021 15:53:26 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/02/2021 15:42, Ard Biesheuvel wrote: > On Thu, 4 Feb 2021 at 12:32, Guillaume Tucker > wrote: >> >> On 04/02/2021 10:33, Guillaume Tucker wrote: >>> On 04/02/2021 10:27, Ard Biesheuvel wrote: >>>> On Thu, 4 Feb 2021 at 11:06, Russell King - ARM Linux admin >>>> wrote: >>>>> >>>>> On Thu, Feb 04, 2021 at 10:07:58AM +0100, Ard Biesheuvel wrote: >>>>>> On Thu, 4 Feb 2021 at 09:43, Guillaume Tucker >>>>>> wrote: >>>>>>> >>>>>>> Hi Ard, >>>>>>> >>>>>>> Please see the bisection report below about a boot failure on >>>>>>> rk3288 with next-20210203. It was also bisected on >>>>>>> imx6q-var-dt6customboard with next-20210202. >>>>>>> >>>>>>> Reports aren't automatically sent to the public while we're >>>>>>> trialing new bisection features on kernelci.org but this one >>>>>>> looks valid. >>>>>>> >>>>>>> The kernel is most likely crashing very early on, so there's >>>>>>> nothing in the logs. Please let us know if you need some help >>>>>>> with debugging or trying a fix on these platforms. >>>>>>> >>>>>> >>>>>> Thanks for the report. >>>>> >>>>> Ard, >>>>> >>>>> I want to send my fixes branch today which includes your regression >>>>> fix that caused this regression. >>>>> >>>>> As this is proving difficult to fix, I can only drop your fix from >>>>> my fixes branch - and given that this seems to be problematical, I'm >>>>> tempted to revert the original change at this point which should fix >>>>> both of these regressions - and then we have another go at getting rid >>>>> of the set/way instructions during the next cycle. >>>>> >>>>> Thoughts? >>>>> >>>> >>>> Hi Russell, >>>> >>>> If Guillaume is willing to do the experiment, and it fixes the issue, >>> >>> Yes, I'm running some tests with that fix now and should have >>> some results shortly. >> >> Yes it does fix the issue: >> >> https://lava.collabora.co.uk/scheduler/job/3173819 >> >> with Ard's fix applied to this test branch: >> >> https://gitlab.collabora.com/gtucker/linux/-/commits/next-20210203-ard-fix/ >> >> >> +clang +Nick >> >> It's worth mentioning that the issue only happens with kernels >> built with Clang. As you can see there are several other arm >> platforms failing with clang-11 builds but booting fine with >> gcc-8: >> >> https://kernelci.org/test/job/next/branch/master/kernel/next-20210203/plan/baseline/ >> >> Here's a sample build log: >> >> https://storage.staging.kernelci.org/gtucker/next-20210203-ard-fix/v5.10-rc4-24722-g58b6c0e507b7-gtucker_single-staging-33/arm/multi_v7_defconfig/clang-11/build.log >> >> Essentially: >> >> make -j18 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- LLVM=1 CC="ccache clang" zImage >> >> I believe it should be using the GNU assembler as LLVM_IAS=1 is >> not defined, but there may be something more subtle about it. >> > > > Do you have a link for a failing zImage built from multi_v7_defconfig? Sure, this one was built from a plain next-20210203: http://storage.staging.kernelci.org/gtucker/next-20210203-ard-fix/v5.10-rc4-24722-g58b6c0e507b7-gtucker_single-staging-33/arm/multi_v7_defconfig/clang-11/zImage You can also find the dtbs, modules and other things in that same directory. For the record, here's the test job that used it: https://lava.collabora.co.uk/scheduler/job/3173792 Guillaume