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=-5.0 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,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 EFD58C433E0 for ; Thu, 4 Feb 2021 11:46:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B415164DDE for ; Thu, 4 Feb 2021 11:46:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235907AbhBDLqX (ORCPT ); Thu, 4 Feb 2021 06:46:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235586AbhBDLqU (ORCPT ); Thu, 4 Feb 2021 06:46:20 -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 0823AC061573 for ; Thu, 4 Feb 2021 03:45:25 -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=JGhVURvln/aI2r9tiRPahDvAcS6/jkWSFn2D77VPLeU=; b=dFRjefJBEbMh2cRlN7JhpLOnH JjeqGzRYQySK5TNV5E54n3VHqawx5pyNS1WZKSRntLzT4NB31aHvuxYZVmCNB129uih0y5qxj+E+p kId6f16iPz/kETZ/E0McmoJZhTv2jji7fNyOdCkMgy/21/hz3TJBbLftMDmjm9HIXX4k9yAakY+Jr fe1cHXxQZ+0SNSRhKpFY+4c99J+rrhv32KrQuWbVBEew6q5QVcuntzl9k7LAME31OtknDHudNId6Y Vs7Sen1OUvMf8RaVeyAG0uQxTYe+esxTF9YUmL/aqbbqqzSZbwQ25XUp91mqGk1+Nb4lgsh/74Hai 9qqr/S8dw==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:39068) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1l7d4d-0006V8-GY; Thu, 04 Feb 2021 11:45:23 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1l7d3c-00058V-FB; Thu, 04 Feb 2021 11:44:20 +0000 Date: Thu, 4 Feb 2021 11:44:20 +0000 From: Russell King - ARM Linux admin To: Guillaume Tucker Cc: Ard Biesheuvel , Geert Uytterhoeven , Linux Kernel Mailing List , Linus Walleij , Linux ARM , Nicolas Pitre , "kernelci-results@groups.io" , clang-built-linux , Nick Desaulniers Subject: Re: next/master bisection: baseline.login on rk3288-rock2-square Message-ID: <20210204114420.GW1463@shell.armlinux.org.uk> 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46373679-a149-8a3d-e914-780e4c6ff8be@collabora.com> 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 Thu, Feb 04, 2021 at 11:32:05AM +0000, Guillaume Tucker wrote: > 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: My gut feeling is that it isn't Clang specific - it's likely down to the exact code/data placement, how things end up during decompression, and exactly what state the cache ends up in. That certainly was the case with the original regression. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!