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 6AA12C433EF for ; Wed, 15 Dec 2021 16:31:15 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id F18D66B0071; Wed, 15 Dec 2021 11:31:04 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id EA2676B0073; Wed, 15 Dec 2021 11:31:04 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D689F6B0074; Wed, 15 Dec 2021 11:31:04 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0033.hostedemail.com [216.40.44.33]) by kanga.kvack.org (Postfix) with ESMTP id C84D46B0071 for ; Wed, 15 Dec 2021 11:31:04 -0500 (EST) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 8C91582499B9 for ; Wed, 15 Dec 2021 16:30:54 +0000 (UTC) X-FDA: 78920567628.29.90821DA Received: from mail-qt1-f175.google.com (mail-qt1-f175.google.com [209.85.160.175]) by imf24.hostedemail.com (Postfix) with ESMTP id D548218001B for ; Wed, 15 Dec 2021 16:30:51 +0000 (UTC) Received: by mail-qt1-f175.google.com with SMTP id o17so22381323qtk.1 for ; Wed, 15 Dec 2021 08:30:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=wa3MSwzDAVEHbCGfosICE8v1Pk9jdslFTtIGuGG4a6I=; b=c1PTqBMF2SXFw5lVk084Vcgcek2Ddjlpi2a/hQ6JzoM4R8cD0nIQ8k9FoYV4Lu14fi M8tFTAORWv7YALou+JE8nu5AZc14AcvyjMOUQ9yqxRGPnwMzWiqJI85Z/mRF2fadacuC KXb0zyqGpCLO+Mqo0kSbjkv3VwDAsletVkn36MxSRx2Jk4xgL3VeZ6U3JTPRlMZ3Hg4S oA3Pw45p4nQ7aubQ1wlqtUyljRMPJVfj+SEQ0cq9LyJ4fm3f5BpeC8JKvLzhgfeYxZOj x9D770IdLdjIxhZh/wAY1OnYTQbB95wNIfiJWE3UpR/BPIAL979uwnD3S0AUn6x23lTA aO6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=wa3MSwzDAVEHbCGfosICE8v1Pk9jdslFTtIGuGG4a6I=; b=W+ChnCymCG6BokaTnh3VkSdA4XdK13aZo1ldeJFduFJ5fC/i2muG+DQiVmy/fAt8nA rcyIzku15LTxAcywhDsN9UR9NUp0lsOQcJO0YDEJbHAX2jPOdXOy3sjWCXbGqP6Tqsjb ittV9mHEuZ7ZsE5+3ZbhhW4xiAMza8gWxjjBgojeW9wCuTADXcYW7ij2iDNHTdqTAvu7 aN2P/F7tZ7xtB6xPqNmzNI/doizDGxytZV49ASXPROe/BGL0x2y/xKDftdjueV2/DL+s zFc0x+eVgsWwSLU+5RKHN1wDsVA0jak9mCQRExVR7jZYCiDqgLm42xmw2z/8Pdi/DVuO GXnA== X-Gm-Message-State: AOAM530cuDL1CbMiBTF8QJHbc4Bw493zPadGTGnF8jSuHHutyC7opj21 GeG1bedDwhBes7mH4eO96Hf//9UIM1jUjZQZA/4GyA== X-Google-Smtp-Source: ABdhPJznT9ryyPhejtvqmNNv2J7uP1C2hCS3T5NZLL6AV5TLtXI9JAXkKTeGlkeEWt81/Q2IglZMECltJD/vANZdg+c= X-Received: by 2002:a05:622a:2d5:: with SMTP id a21mr12781053qtx.56.1639585853171; Wed, 15 Dec 2021 08:30:53 -0800 (PST) MIME-Version: 1.0 References: <20211214162050.660953-1-glider@google.com> <20211214162050.660953-34-glider@google.com> In-Reply-To: From: Alexander Potapenko Date: Wed, 15 Dec 2021 17:30:14 +0100 Message-ID: Subject: Re: [PATCH 33/43] kmsan: disable physical page merging in biovec To: Mark Rutland Cc: Alexander Viro , Andrew Morton , Andrey Konovalov , Andy Lutomirski , Ard Biesheuvel , 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 , Marco Elver , Matthew Wilcox , "Michael S. Tsirkin" , Pekka Enberg , Peter Zijlstra , Petr Mladek , Steven Rostedt , Thomas Gleixner , Vasily Gorbik , Vegard Nossum , Vlastimil Babka , linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: D548218001B X-Stat-Signature: rqznzi8h3a57fbck8m9dhes7h18hkm3m Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=c1PTqBMF; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf24.hostedemail.com: domain of glider@google.com designates 209.85.160.175 as permitted sender) smtp.mailfrom=glider@google.com X-HE-Tag: 1639585851-285072 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, Dec 15, 2021 at 3:17 PM Mark Rutland wrote: > > On Tue, Dec 14, 2021 at 05:20:40PM +0100, Alexander Potapenko wrote: > > KMSAN metadata for consequent physical pages may be inconsequent, > > I think you mean 'adjacent'/ rather than 'consequent' here, i.e. Correct, thank you! > > + /* > > + * Merging consequent physical pages may not work correctly under KMSAN > > + * if their metadata pages aren't consequent. Just disable merging. > > + */ > > Likewise here. Ack.