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[2620:137:e000::3:1]) by mx.google.com with ESMTPS id a20-20020a170902b59400b001d098bf0df8si5757549pls.612.2023.12.11.02.14.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Dec 2023 02:14:15 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:1 as permitted sender) client-ip=2620:137:e000::3:1; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20230601 header.b=NCSFYlSx; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:1 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by morse.vger.email (Postfix) with ESMTP id 0BAA980473DF; Mon, 11 Dec 2023 02:14:13 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at morse.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234751AbjLKKN7 (ORCPT + 99 others); Mon, 11 Dec 2023 05:13:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58876 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234675AbjLKKN5 (ORCPT ); Mon, 11 Dec 2023 05:13:57 -0500 Received: from mail-yw1-x112b.google.com (mail-yw1-x112b.google.com [IPv6:2607:f8b0:4864:20::112b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A0603D5 for ; Mon, 11 Dec 2023 02:14:03 -0800 (PST) Received: by mail-yw1-x112b.google.com with SMTP id 00721157ae682-5d8a772157fso35301727b3.3 for ; Mon, 11 Dec 2023 02:14:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1702289643; x=1702894443; darn=vger.kernel.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=5Z6zY4c0Tb5+ieU4d3Nz6Jn4MLK8nHKOQpLlbBpEjKg=; b=NCSFYlSxaMBXjGEeo9r58onG6AqzMDuUvTpfYB7xy1IT+ia+GZbt7Y3b7ivuFErQis qGzAtEYfMDOI0O+bMzCTklMFkQI8m36CqZHD9qClzyaVvPFR0XU6tXeYei0SfuIohZA3 g5YRmTWwUZx8vZdTGOcw5Aknqj2f6oh1Nsbyo5OKXYMcUoc0nDYv91KoSDBJyZ3rnZlm Ntiku1i/R5DHBday/ia+Nj31jiwNxr6l3QT3rpYE2y2TbVRrO6dKcB9cbtSLUehEUlLV oGEkH7ngxQqx14u/IaWe1SuX9yJ73+lXUab+jhwxMg+yDau9RZUnmzqfRBTmJbGubwyb XETw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702289643; x=1702894443; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5Z6zY4c0Tb5+ieU4d3Nz6Jn4MLK8nHKOQpLlbBpEjKg=; b=c98jOIes3ZjdZN19yDlObwQpNpl7A4SCWv2fu3YRI6Wm6Lwm1DVVyC0n6tzXLghFYd 4G4QBefwaAwbsKaTfXbRHtuqC8pTG/NvIRd4sNPHxeKXZz9gCqCamkraeEwl6OSrLHty RbMFz2T8zmgkitDWt3GnxKoomKnBKewEFoPzsQG7mVmwFOC5FyJyvtY8JLjUuhtAUPqJ D22XTI/+qHOWVcviHA2ZR4OYDgdqyzN3PggyRrupbpYNGqwTpX6Xv0pZYPZmxHRibxoc K5Mzq5cTGUlUm6TsVbHORG4a9mpUJH+OEN3E1E1f0cKSu618wljKVu3vwMpUpntqBAel bsaA== X-Gm-Message-State: AOJu0YzdKD+5ss9Ou7XDFQ2hl8BcuL9zW9E33owdK/5jIA/4fxLR6tJ3 v0DD2kLFW07St52L7wKntk2LuHQb5x857nittXOMyg== X-Received: by 2002:a05:690c:3249:b0:5df:4992:9f90 with SMTP id fg9-20020a05690c324900b005df49929f90mr2222920ywb.34.1702289642775; Mon, 11 Dec 2023 02:14:02 -0800 (PST) MIME-Version: 1.0 References: <20231121220155.1217090-1-iii@linux.ibm.com> <20231121220155.1217090-28-iii@linux.ibm.com> In-Reply-To: <20231121220155.1217090-28-iii@linux.ibm.com> From: Alexander Potapenko Date: Mon, 11 Dec 2023 11:13:26 +0100 Message-ID: Subject: Re: [PATCH v2 27/33] s390/mm: Define KMSAN metadata for vmalloc and modules To: Ilya Leoshkevich Cc: Alexander Gordeev , Andrew Morton , Christoph Lameter , David Rientjes , Heiko Carstens , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka , Christian Borntraeger , Dmitry Vyukov , Hyeonggon Yoo <42.hyeyoo@gmail.com>, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Mark Rutland , Roman Gushchin , Sven Schnelle Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-8.4 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on morse.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (morse.vger.email [0.0.0.0]); Mon, 11 Dec 2023 02:14:13 -0800 (PST) On Tue, Nov 21, 2023 at 11:07=E2=80=AFPM Ilya Leoshkevich wrote: > > The pages for the KMSAN metadata associated with most kernel mappings > are taken from memblock by the common code. However, vmalloc and module > metadata needs to be defined by the architectures. > > Be a little bit more careful than x86: allocate exactly MODULES_LEN > for the module shadow and origins, and then take 2/3 of vmalloc for > the vmalloc shadow and origins. This ensures that users passing small > vmalloc=3D values on the command line do not cause module metadata > collisions. > > Signed-off-by: Ilya Leoshkevich Reviewed-by: Alexander Potapenko (hope some s390 maintainer acks this as well)