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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB7E2C00140 for ; Tue, 2 Aug 2022 17:48:00 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 2FC9B6B0071; Tue, 2 Aug 2022 13:48:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2AC328E0002; Tue, 2 Aug 2022 13:48:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 14DBC8E0001; Tue, 2 Aug 2022 13:48:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 060316B0071 for ; Tue, 2 Aug 2022 13:48:00 -0400 (EDT) Received: from smtpin26.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id CC657A0F6D for ; Tue, 2 Aug 2022 17:47:59 +0000 (UTC) X-FDA: 79755385878.26.AA7A8EB Received: from mail-yw1-f174.google.com (mail-yw1-f174.google.com [209.85.128.174]) by imf23.hostedemail.com (Postfix) with ESMTP id 62D7D140108 for ; Tue, 2 Aug 2022 17:47:59 +0000 (UTC) Received: by mail-yw1-f174.google.com with SMTP id 00721157ae682-324ec5a9e97so64349967b3.7 for ; Tue, 02 Aug 2022 10:47:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc; bh=CyPUbDaavl0pxtUchWqOoJ+rGYNrTSx7Qsh7yOX4nqk=; b=Vi4b18H4ruvdsnsfKL+xHB8JIstAaWj9GfTkdEHEJfP6HGkV2K7VRqfDfHV17mNn9+ YfDABrmK4w3SaPqVBh5bXyQbe6x3QXHpoIU4WzT8xxgoUcS5ml2XHVtfsuJ2zqcQFhAd J8s0AZuAHn9KYK0oFgegc6so4j9E30I7XfPuVoFbmhCmTQvId+u5/XCreKdsxSA5N46X SzXnSQqra+iDjPn1Yh+9dDucGZnRiNvonatXvefk8NrHF+gnwxvG5okVRbt49+/VrHxu aM9r26REYHwDUJwLqat8Mxrb/RWmuMfHajj/WVBheWk/3pUXKjHQbhf0W8qkPy+w2fDD sXkQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc; bh=CyPUbDaavl0pxtUchWqOoJ+rGYNrTSx7Qsh7yOX4nqk=; b=FIMx6S65/KBwgmhQkXiZj4MHTefYhp6ZJN7sKNGJgAQ3IF2UJIxUw6ocROh7zyhExz Tfj8LGMOCoM9SPRmX2p5BcRP8Tij7GxRHTalfMbQBrho8bnEjRcjMips0HfzkPj0X8jB ndxF9m67+fw6LtcS058+80D9zx6OQaN+g42z2yOCcd7GGpZnqgumYruRbrwfY1ol9Czd UuqXixHbtD3XOTRNzyIo1RlTR4LkExyZU5rMM9YUQnCZjphcsoDFnk5z+igLZwkV5qpH q66THtpS2pOu6dOwBcbUpplpp54FN+jViOmbIA0jxSQcazWQhe8odEp+TeoWrUna6AdF XJVQ== X-Gm-Message-State: ACgBeo1zhh5qymIW14S51oAlP8Ue8nmlLQXV1dQBfdQdkJ2NeestQEd2 gpUJwQD2lEtm6Pvidk8NWqteeYzrVPkcy5jKbqcg3g== X-Google-Smtp-Source: AA6agR5ff/2YTaiH0o2yaXcd9Vb4iGB8rk5BtGV2WejE90cyd/4A41JUybbJAmYoeDw71I0Y93ZyFnAevmMFLK5vkyw= X-Received: by 2002:a81:5ca:0:b0:31f:38d6:f59f with SMTP id 193-20020a8105ca000000b0031f38d6f59fmr18721968ywf.324.1659462477479; Tue, 02 Aug 2022 10:47:57 -0700 (PDT) MIME-Version: 1.0 References: <20220701142310.2188015-1-glider@google.com> <20220701142310.2188015-30-glider@google.com> In-Reply-To: From: Alexander Potapenko Date: Tue, 2 Aug 2022 19:47:21 +0200 Message-ID: Subject: Re: [PATCH v4 29/45] block: kmsan: skip bio block merging logic for KMSAN To: Marco Elver 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 , Linux Memory Management List , Linux-Arch , LKML , Eric Biggers Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=Vi4b18H4; spf=pass (imf23.hostedemail.com: domain of glider@google.com designates 209.85.128.174 as permitted sender) smtp.mailfrom=glider@google.com; dmarc=pass (policy=reject) header.from=google.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1659462479; a=rsa-sha256; cv=none; b=cXD4Z5U1LgbyK9M4IhENLmD6ZoAtodUMwYuvHIXlbi4Yv3Zli25A75uUdpvglpHCBAtVdb CNPucFwkiaz9rUP+djgU+IBVyI1ZnDMk53HA3cvYcki5er1XxAsEl7ulLZ3mXzMTBCikYB zpIHZ7241xon1X5JRcyduoGWX94dRKU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1659462479; h=from:from:sender: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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=CyPUbDaavl0pxtUchWqOoJ+rGYNrTSx7Qsh7yOX4nqk=; b=7TVAl5gAwaY4CygAiZLvR1bXGslTJXZw2pJ+1kZpcyAXSvlsTfSCVoQq6t6SsjZOVMzs/R t6r4qtlPMoctXP9Wu34GVgCY3n2T80xTp1vGjib/YElOMg772u9ukSp3PB8mSUwjwFnHji NyD9nUKC7dYqut+DZvAPNPrfivrAfeM= X-Stat-Signature: tkxzqepw193d7cwtjzpfubud3jy3n434 X-Rspamd-Queue-Id: 62D7D140108 X-Rspam-User: X-Rspamd-Server: rspam05 Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=Vi4b18H4; spf=pass (imf23.hostedemail.com: domain of glider@google.com designates 209.85.128.174 as permitted sender) smtp.mailfrom=glider@google.com; dmarc=pass (policy=reject) header.from=google.com X-HE-Tag: 1659462479-547915 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 Wed, Jul 13, 2022 at 12:23 PM Marco Elver wrote: > > On Fri, Jul 01, 2022 at 04:22PM +0200, 'Alexander Potapenko' via kasan-de= v wrote: > [...] > > --- a/block/bio.c > > +++ b/block/bio.c > > @@ -867,6 +867,8 @@ static inline bool page_is_mergeable(const struct b= io_vec *bv, > > return false; > > > > *same_page =3D ((vec_end_addr & PAGE_MASK) =3D=3D 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; > Done. > > return (bv->bv_page + bv_end / PAGE_SIZE) =3D=3D (page + off / PA= GE_SIZE); --=20 Alexander Potapenko Software Engineer Google Germany GmbH Erika-Mann-Stra=C3=9Fe, 33 80636 M=C3=BCnchen Gesch=C3=A4ftsf=C3=BChrer: Paul Manicle, Liana Sebastian Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg