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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable 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 81316C10F03 for ; Fri, 1 Mar 2019 09:02:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4E29B206DD for ; Fri, 1 Mar 2019 09:02:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732956AbfCAJC2 (ORCPT ); Fri, 1 Mar 2019 04:02:28 -0500 Received: from mx2.suse.de ([195.135.220.15]:59468 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725951AbfCAJC2 (ORCPT ); Fri, 1 Mar 2019 04:02:28 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 173D8AF76; Fri, 1 Mar 2019 09:02:26 +0000 (UTC) Subject: Re: next/master boot bisection: next-20190215 on beaglebone-black To: Dan Williams , Andrew Morton Cc: Mark Brown , "kernelci.org bot" , Tomeu Vizoso , guillaume.tucker@collabora.com, matthew.hart@linaro.org, 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 , Michal Hocko , Richard Guy Briggs , "Peter Zijlstra (Intel)" References: <5c6702da.1c69fb81.12a14.4ece@mx.google.com> <20190215104325.039dbbd9c3bfb35b95f9247b@linux-foundation.org> <20190215185151.GG7897@sirena.org.uk> <20190226155948.299aa894a5576e61dda3e5aa@linux-foundation.org> From: Vlastimil Babka Openpgp: preference=signencrypt Autocrypt: addr=vbabka@suse.cz; 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hFNGBTYyPq6mGW9jqaQ8en3ZmmJyw3CHwxZ5FZQ5qc55xgshKiy8jEtxh+dgB9d8zE/S/UGI E99N/q+kEKSgSMQMJ/CYPHQJVTi4YHh1yq/qTkHRX+ortrF5VEeDJDv+SljNStIxUdroPD29 2ijoaMFTAU+uBtE14UP5F+LWdmRdEGS1Ah1NwooL27uAFllTDQxDhg/+LJ/TqB8ZuidOIy1B xVKRSg3I2m+DUTVqBy7Lixo73hnW69kSjtqCeamY/NSu6LNP+b0wAOKhwz9hBEwEHLp05+mj 5ZFJyfGsOiNUcMoO/17FO4EBxSDP3FDLllpuzlFD7SXkfJaMWYmXIlO0jLzdfwfcnDzBbPwO hBM8hvtsyq8lq8vJOxv6XD6xcTtj5Az8t2JjdUX6SF9hxJpwhBU0wrCoGDkWp4Bbv6jnF7zP Nzftr4l8RuJoywDIiJpdaNpSlXKpj/K6KrnyAI/joYc7 Message-ID: <07d4e843-8023-2041-22a7-b5b589f4d2c0@suse.cz> Date: Fri, 1 Mar 2019 10:02:23 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/27/19 1:04 AM, 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. I'm afraid it couldn't have. Bisection identified the "enable all shuffling" patch, but the free area mis-accounting happened regardless of shuffling being enabled. And if dropping the "enable all shuffling" patch stopped the problem even before the misacounting fix was merged, that's another confirmation. Is it possible that the platform silently depends on large contiguous areas without a proper CMA reservation, and the shuffling fragments them? Or maybe the CMA reservation happens too late? > I assume you're not willing to entertain a "depends > NOT_THIS_ARM_BOARD" hack in the meantime? >