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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 649E9C433EF for ; Wed, 13 Jul 2022 10:23:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234630AbiGMKXL (ORCPT ); Wed, 13 Jul 2022 06:23:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235857AbiGMKXE (ORCPT ); Wed, 13 Jul 2022 06:23:04 -0400 Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ADB88FACB4 for ; Wed, 13 Jul 2022 03:23:01 -0700 (PDT) Received: by mail-wr1-x435.google.com with SMTP id r10so8676333wrv.4 for ; Wed, 13 Jul 2022 03:23:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=p3iDfE6X71ht0fb+AD37KbLhdKay+NMX0GxKDHXhdRo=; b=q5OYPMJHc5NTpTBzTnc2mfMCiWiuFAgpk/TjYZp6GcepMPcq5lgDiZ6LzuOUflA0jP mQ20OBCBA1dYRhBZlWXUYryRzuNxkRlU64ueE1Y3qgyhCS25l6CBUdFVPV/fyL6IUiPO CfdQF6vBqI2Y4rRVsv0spa8Dm9hA9W4jMIxk1PEOiQKIF9jWR6+J4PxJMbZelE4LxXkG U4TNOegzsfXO6Ejet7NiH1CF1VYsu6UgyAqkOZjOIS/Moqs10lM8FvGzfF5ouThkv9th Hxv7S6vuFyiAFwApfnhAwh4XA0kMaKq6XMsmFQxQ4Gb+0c8t6UgA/iG370Ot+63SoAg+ nXKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=p3iDfE6X71ht0fb+AD37KbLhdKay+NMX0GxKDHXhdRo=; b=EtK2PU55SRuywgKMVzBEjedpQ5p/9/65PPQPlCSg3+h/kkU6bW00hbzoINbJ0MythG AzxQqs8Z2S75prLcHf+PQr25U+KnWHI5r8hKNuN1Of98f1oJvIBan3waC6t4Ch/dHNay VsV2JRlQK3BO1x7qx/VI45yRLEtj5MKu5MZsN4sOuyEMWD9AzH37fOabofSg0RerX92T tJEfXOV2oReOxHYkhqEN63Ag1BguF24iJtNTcajHG/EeHlOlmmTvaCs2qgaZLiWHMyQO IO8yuh2Uv25xftBKB9TdNxWyozwlmklvZeT7u6BvvCY0BaANs9xY9jIrisdKBOYx2Gwj fnvw== X-Gm-Message-State: AJIora8NRVyLZpjWk+hdesGJH/bDFssRUsvj/8EPf5Z2eKOMJoZOcNg/ /iqmNFAUU/L8vPOGiAqZHUt7NA== X-Google-Smtp-Source: AGRyM1vP2cGTFHqS8DKrWw0AYUkMavOCEdacrjPpnfgTi5vrwimbctVkcDkN5Hi39rFjMQJqVgMbGw== X-Received: by 2002:adf:f1d1:0:b0:21d:7f88:d638 with SMTP id z17-20020adff1d1000000b0021d7f88d638mr2542788wro.586.1657707780036; Wed, 13 Jul 2022 03:23:00 -0700 (PDT) Received: from elver.google.com ([2a00:79e0:9c:201:63e6:a6c0:5e2a:ac17]) by smtp.gmail.com with ESMTPSA id g6-20020a5d64e6000000b0021d887f9468sm10685642wri.25.2022.07.13.03.22.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jul 2022 03:22:58 -0700 (PDT) Date: Wed, 13 Jul 2022 12:22:52 +0200 From: Marco Elver To: Alexander Potapenko Cc: Alexander Viro , Alexei Starovoitov , Andrew Morton , Andrey Konovalov , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Christoph Hellwig , Christoph Lameter , David Rientjes , Dmitry Vyukov , Eric Dumazet , Greg Kroah-Hartman , Herbert Xu , Ilya Leoshkevich , Ingo Molnar , Jens Axboe , Joonsoo Kim , Kees Cook , Mark Rutland , Matthew Wilcox , "Michael S. Tsirkin" , Pekka Enberg , Peter Zijlstra , Petr Mladek , Steven Rostedt , Thomas Gleixner , Vasily Gorbik , Vegard Nossum , Vlastimil Babka , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Eric Biggers Subject: Re: [PATCH v4 29/45] block: kmsan: skip bio block merging logic for KMSAN Message-ID: References: <20220701142310.2188015-1-glider@google.com> <20220701142310.2188015-30-glider@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220701142310.2188015-30-glider@google.com> User-Agent: Mutt/2.2.3 (2022-04-12) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 01, 2022 at 04:22PM +0200, 'Alexander Potapenko' via kasan-dev wrote: [...] > --- a/block/bio.c > +++ b/block/bio.c > @@ -867,6 +867,8 @@ static inline bool page_is_mergeable(const struct bio_vec *bv, > return false; > > *same_page = ((vec_end_addr & PAGE_MASK) == page_addr); > + if (!*same_page && IS_ENABLED(CONFIG_KMSAN)) > + return false; > if (*same_page) > return true; if (*same_page) return true; else if (IS_ENABLED(CONFIG_KMSAN)) return false; > return (bv->bv_page + bv_end / PAGE_SIZE) == (page + off / PAGE_SIZE);