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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,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 9832AC432C0 for ; Sun, 1 Dec 2019 15:10:23 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5491C20867 for ; Sun, 1 Dec 2019 15:10:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="ECRxpSzq" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5491C20867 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=alien8.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id DDB866B0003; Sun, 1 Dec 2019 10:10:22 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D8A736B0005; Sun, 1 Dec 2019 10:10:22 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C78F06B0006; Sun, 1 Dec 2019 10:10:22 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0175.hostedemail.com [216.40.44.175]) by kanga.kvack.org (Postfix) with ESMTP id AF5E56B0003 for ; Sun, 1 Dec 2019 10:10:22 -0500 (EST) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id 5C3041F0A for ; Sun, 1 Dec 2019 15:10:22 +0000 (UTC) X-FDA: 76216908684.18.trip32_33079eab7420 X-HE-Tag: trip32_33079eab7420 X-Filterd-Recvd-Size: 4080 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by imf22.hostedemail.com (Postfix) with ESMTP for ; Sun, 1 Dec 2019 15:10:21 +0000 (UTC) Received: from zn.tnic (p200300EC2F2CED0040BA74DAC07AD948.dip0.t-ipconnect.de [IPv6:2003:ec:2f2c:ed00:40ba:74da:c07a:d948]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 75F0A1EC0419; Sun, 1 Dec 2019 16:10:19 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1575213019; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=EuqTV4BeuCAOQpabFsNoWDXEGUdxYlozpQm3U+r+EwY=; b=ECRxpSzqagJvvXO6fef6kpH4vWJyuaUyQkeaoXR+km/oKu3xzXTtAW4LB6zAYWCd9cO9a6 fQbjfA10EkYOtqUwrSo5MHgWpIt0QXBYJm5b/xVz0MYHFeSUzh2llfRv/FycvhjaTz7CV2 7Be/mdaNbtaSkpQ1ltVqgi1Mx33xTsY= Date: Sun, 1 Dec 2019 16:10:11 +0100 From: Borislav Petkov To: Linus Torvalds Cc: Andrew Morton , alex@ghiti.fr, aou@eecs.berkeley.edu, Ard Biesheuvel , Arnd Bergmann , Andrey Ryabinin , Benjamin Herrenschmidt , Christian Borntraeger , Qian Cai , Catalin Marinas , Dave Hansen , dave.jiang@intel.com, David Miller , Dmitry Vyukov , Alexander Potapenko , Vasily Gorbik , Heiko Carstens , Peter Anvin , James Morse , James Hogan , Kan Liang , Linux-MM , Russell King - ARM Linux , Andrew Lutomirski , Mark Rutland , mawilcox@microsoft.com, Ingo Molnar , mm-commits@vger.kernel.org, Michael Ellerman , n-horiguchi@ah.jp.nec.com, Palmer Dabbelt , Paul Burton , Paul Walmsley , Paul Mackerras , Peter Zijlstra , ralf@linux-mips.org, shashim@codeaurora.org, Steven Price , Thomas Gleixner , vgupta@synopsys.com, Will Deacon , zong.li@sifive.com Subject: Re: [patch 064/158] mm: add generic ptdump Message-ID: <20191201151010.GC6629@zn.tnic> References: <20191201015304.cRPsmKUTM%akpm@linux-foundation.org> <20191201090724.GA6629@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sun, Dec 01, 2019 at 06:45:23AM -0800, Linus Torvalds wrote: > On Sun, Dec 1, 2019 at 1:09 AM Borislav Petkov wrote: > > > > That generic ptdump stuff is probably causing a splat on 32-bit: > > > > https://lkml.kernel.org/r/20191125144946.GA6628@duo.ucw.cz > > Hmm. I'm not sure about code generation, but for me that config gives me Note that I typed "probably" above because I'm not 100% sure it is those patches that would cause it. I mean, I saw EIP pointing to ptdump_pte_entry and was able to repro on linux-next with the .config in a vm. But then your master or tip/master wouldn't trigger so I shelved that as it is merge window and other 32-bit shit was broken, which needed more attention. So lemme first confirm it really is caused by those patches. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette