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=-10.0 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 BE3BFC55ABD for ; Fri, 13 Nov 2020 15:58:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DD8220759 for ; Fri, 13 Nov 2020 15:58:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="ceZJidw5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726871AbgKMP6u (ORCPT ); Fri, 13 Nov 2020 10:58:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44814 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726614AbgKMP6u (ORCPT ); Fri, 13 Nov 2020 10:58:50 -0500 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 82819C0613D1; Fri, 13 Nov 2020 07:58:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=f7t3S1jdVSfRsXfQqlo0fUjZRYtsQhFitY7Hjvr6/jM=; b=ceZJidw5MO1m8hdi/JCiZTulG ZV4AdjOWhCHBfKk3vlSov0mmpQ1jGwIg9LcKJK5TR60X1KBZLNSYPXMMTzDH/usbj8l1Yr32uD7rC COfG4i5bBIHHOzfuW9LNphokoTQPlcqQ073HymwCP21TTG4jPNZLB9TqQIwRa1U794m756cM22N6n pAo2vBr2Kk/Xwmzax3vgOAcVm0DH5fNFFKO+qnp+8CbiilWTb3mE9Vwa2SinrWIt+JBdR5lOPOyfD pX+M4khlODgfJ4E8BaAy/XUBG/7DYA4xxtH1hTzscnnMSCfBvPxBxVpIlTGWdTI9mMoosKBsFv1PW 8nKLw5f6Q==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:59226) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kdbT3-0004yp-BB; Fri, 13 Nov 2020 15:58:29 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1kdbSz-0004Yy-J5; Fri, 13 Nov 2020 15:58:25 +0000 Date: Fri, 13 Nov 2020 15:58:25 +0000 From: Russell King - ARM Linux admin To: Guillaume Tucker Cc: Ard Biesheuvel , Nicolas Pitre , Linus Walleij , kernelci-results@groups.io, Linux ARM , Olof Johansson , Mike Rapoport , Marc Zyngier , Anshuman Khandual , Arvind Sankar , Linux Doc Mailing List , Linux Kernel Mailing List , Andrew Morton , Miguel Ojeda , Jonathan Corbet , Collabora Kernel ML Subject: Re: rmk/for-next bisection: baseline.login on bcm2836-rpi-2-b Message-ID: <20201113155825.GD1551@shell.armlinux.org.uk> References: <5fadef1f.1c69fb81.9166e.093c@mx.google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: Russell King - ARM Linux admin Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 13, 2020 at 03:43:27PM +0000, Guillaume Tucker wrote: > On 13/11/2020 10:35, Ard Biesheuvel wrote: > > On Fri, 13 Nov 2020 at 11:31, Guillaume Tucker > > wrote: > >> > >> Hi Ard, > >> > >> Please see the bisection report below about a boot failure on > >> RPi-2b. > >> > >> Reports aren't automatically sent to the public while we're > >> trialing new bisection features on kernelci.org but this one > >> looks valid. > >> > >> There's nothing in the serial console log, probably because it's > >> crashing too early during boot. I'm not sure if other platforms > >> on kernelci.org were hit by this in the same way, but there > >> doesn't seem to be any. > >> > >> The same regression can be see on rmk's for-next branch as well > >> as in linux-next. It happens with both bcm2835_defconfig and > >> multi_v7_defconfig. > >> > >> Some more details can be found here: > >> > >> https://kernelci.org/test/case/id/5fae44823818ee918adb8864/ > >> > >> If this looks like a real issue but you don't have a platform at > >> hand to reproduce it, please let us know if you would like the > >> KernelCI test to be re-run with earlyprintk or some debug config > >> turned on, or if you have a fix to try. > >> > >> Best wishes, > >> Guillaume > >> > > > > Hello Guillaume, > > > > That patch did have an issue, but it was already fixed by > > > > https://www.armlinux.org.uk/developer/patches/viewpatch.php?id=9020/1 > > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=fc2933c133744305236793025b00c2f7d258b687 > > > > Could you please double check whether cherry-picking that on top of > > the first bad commit fixes the problem? > > Sadly this doesn't appear to be fixing the issue. I've > cherry-picked your patch on top of the commit found by the > bisection but it still didn't boot, here's the git log > > cbb9656e83ca ARM: 9020/1: mm: use correct section size macro to describe the FDT virtual address > 7a1be318f579 ARM: 9012/1: move device tree mapping out of linear region > e9a2f8b599d0 ARM: 9011/1: centralize phys-to-virt conversion of DT/ATAGS address > 3650b228f83a Linux 5.10-rc1 > > Test log: https://people.collabora.com/~gtucker/lava/boot/rpi-2-b/v5.10-rc1-3-gcbb9656e83ca/ > > There's no output so it's hard to tell what is going on, but > reverting the bad commmit does make the board to boot (that's > what "revert: PASS" means in the bisect report). So it's > unlikely that there is another issue causing the boot failure. These silent boot failures are precisely what the DEBUG_LL stuff (and early_printk) is supposed to help with - getting the kernel messages out when there is an oops before the serial console is initialised. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!