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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 14973C33C9E for ; Tue, 14 Jan 2020 20:31:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DFA3C24655 for ; Tue, 14 Jan 2020 20:31:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="qfNdLg3k" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726491AbgANUa7 (ORCPT ); Tue, 14 Jan 2020 15:30:59 -0500 Received: from mail-qk1-f193.google.com ([209.85.222.193]:44127 "EHLO mail-qk1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728346AbgANUa4 (ORCPT ); Tue, 14 Jan 2020 15:30:56 -0500 Received: by mail-qk1-f193.google.com with SMTP id w127so13450424qkb.11 for ; Tue, 14 Jan 2020 12:30:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:cc:in-reply-to:to; bh=GM2cmKJLGIw00BnTkj1dcmxxtlMk1WYpnp+HW9nEczc=; b=qfNdLg3kkuNI6cLLk03N289br06VFc6cqXJqoyJLg1KprL1vXCIrhjDgtVLFvs1Lwb AGCRxsxBhq8RqUyn380ItGPioew6bRYplCRy7vK2et+jGpulMqjnLkOTPeNz/33eXrDq 0vFaoz7vDSh5K80ynQpMr5rMy8tA7f6nYDRq/e+wt1l6rr9+6nNEBxx8MmmB3Qm7R4Cl TNl5xvJuy5W6ApqyVP/ggRMHAYLrtnXI4E8Xv7pyFWREaYmrxqRLCzpVXVmBV7MZyEXE U3rJZrXfsMTvsHDdbHIlb8doOnexZCFIYMkSwEi0SRMSCJOxOWAm5Dg1RaK67s/foSTo ZGxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:cc:in-reply-to:to; bh=GM2cmKJLGIw00BnTkj1dcmxxtlMk1WYpnp+HW9nEczc=; b=onYxnGTufxcTTOO8CY1b0Tlr/+3bmF6uATYxErp2B+KFaU2sFbO5UMxFE9JtIwgc/E kzIKB+xalMdkkyCB5qtL1bK6JSDyGKiXMFz8SFi2y9lt2NApI3wTp1W+PwBJBuC2dRxU P7JXsFeCGpLzN5q7OnZ0SVGGkoOIH4FzW15BGQyx++o7rSFd+N2QDj4ekIOKpUD5ka4n bhND2OZ7hvsQeCdKH5mCXskIQAqdqTEClFNrjT43KGTMD4Owfl2FDBhmg3OMzXLXIN2R 3anj9cTggWrBzcq2Bl1Ji7RKgr3FbNzSbKK0nzM5famd6fqTeRka/bCV1PwDbj1N1+rj EPpA== X-Gm-Message-State: APjAAAVhC5W/ttlYSq8C/kmaiY7YXGGfOkHYA7oAQoNqOThxuhhb/n2p 0JV8jIfb/3N/en6aUOddrE3xqasPnUZ52w== X-Google-Smtp-Source: APXvYqySWPhc8cNWPW6ZR1czJUmUILrXAmHD502QnwiMjSkfcnjRHGogwSncB5M2bJhCbEL2kLY/AQ== X-Received: by 2002:ae9:c104:: with SMTP id z4mr18665764qki.418.1579033855079; Tue, 14 Jan 2020 12:30:55 -0800 (PST) Received: from [192.168.1.183] (pool-71-184-117-43.bstnma.fios.verizon.net. [71.184.117.43]) by smtp.gmail.com with ESMTPSA id 68sm7357546qkj.102.2020.01.14.12.30.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Jan 2020 12:30:54 -0800 (PST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: [PATCH v4 01/10] kcsan: Add Kernel Concurrency Sanitizer infrastructure Date: Tue, 14 Jan 2020 15:30:53 -0500 Message-Id: References: <20200114192220.GS2935@paulmck-ThinkPad-P72> Cc: Marco Elver , LKMM Maintainers -- Akira Yokosawa , Alan Stern , Alexander Potapenko , Andrea Parri , Andrey Konovalov , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Boqun Feng , Borislav Petkov , Daniel Axtens , Daniel Lustig , Dave Hansen , David Howells , Dmitry Vyukov , "H. Peter Anvin" , Ingo Molnar , Jade Alglave , Joel Fernandes , Jonathan Corbet , Josh Poimboeuf , Luc Maranget , Mark Rutland , Nicholas Piggin , Peter Zijlstra , Thomas Gleixner , Will Deacon , Eric Dumazet , kasan-dev , linux-arch , "open list:DOCUMENTATION" , linux-efi@vger.kernel.org, Linux Kbuild mailing list , LKML , Linux Memory Management List , the arch/x86 maintainers In-Reply-To: <20200114192220.GS2935@paulmck-ThinkPad-P72> To: paulmck@kernel.org X-Mailer: iPhone Mail (17C54) Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org > On Jan 14, 2020, at 2:22 PM, Paul E. McKenney wrote: >=20 > Just so I understand... Does this problem happen even in CONFIG_KCSAN=3Dn= > kernels? No. >=20 > I have been running extensive CONFIG_KSCAN=3Dy rcutorture tests for quite > awhile now, so even if this only happens for CONFIG_KSCAN=3Dy, it is not > like it affects everyone. >=20 > Yes, it should be fixed, and Marco does have a patch on the way. The concern is really about setting KSCAN=3Dy in a distro debug kernel where= it has other debug options. I=E2=80=99ll try to dig into more of those issu= es in the next few days.=