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=-8.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 DAACEC432C3 for ; Mon, 25 Nov 2019 09:14:38 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9D75A20823 for ; Mon, 25 Nov 2019 09:14:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jrK1SS21" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9D75A20823 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 411216B05C3; Mon, 25 Nov 2019 04:14:38 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 3C3826B05C4; Mon, 25 Nov 2019 04:14:38 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 288EB6B05C5; Mon, 25 Nov 2019 04:14:38 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0050.hostedemail.com [216.40.44.50]) by kanga.kvack.org (Postfix) with ESMTP id 1291E6B05C3 for ; Mon, 25 Nov 2019 04:14:38 -0500 (EST) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id B1E9E181AEF1F for ; Mon, 25 Nov 2019 09:14:37 +0000 (UTC) X-FDA: 76194239394.29.star66_2859e5f472747 X-HE-Tag: star66_2859e5f472747 X-Filterd-Recvd-Size: 5124 Received: from mail-wr1-f66.google.com (mail-wr1-f66.google.com [209.85.221.66]) by imf25.hostedemail.com (Postfix) with ESMTP for ; Mon, 25 Nov 2019 09:14:37 +0000 (UTC) Received: by mail-wr1-f66.google.com with SMTP id z7so13505709wrl.13 for ; Mon, 25 Nov 2019 01:14:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=9lokJOjUSbP5mKx4LBLfi9XDxCZWFBEQZfW9A2wvssM=; b=jrK1SS21JOYy3ZTsH3E73VCRB/jsz/LeDvR9SKI7PBGFOpTx5k4CjRIe+YW9GiAP3T F22wYqVOmyUUQbe4txcp3E/ZIUi7yxzlgtppp6QWESOEmK/jbBtwv4SKBm+es5aUi40w L8Zhiszcsmf41NFwHw7Jtq/JtE6kD91cDaEQ37UEMBsvePAf9rzAYHikE37IeLt2MUMN 1/JN1qn9lcwCP608a+y/5b+Lu/AQhk04yETSEnMR1l2sjIkM4rlso6PD9XsN0hoJ0+sz fe7KbyXIDCvMozD0XJt/h0nwBqpX8ri+kP/HOwMhpUWblCDIYLXSrU6hEfzIUgIDBrJi OM2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=9lokJOjUSbP5mKx4LBLfi9XDxCZWFBEQZfW9A2wvssM=; b=ngXB5jSF7KnVeTGfsi5lvRzkCcaULsqJM9UOQolk+zfRYXZpV5Yli8X2Fe42kaOM+o 2VNVxGkoaSmsG5ntSRSpbBSjvEYEx/rTGlBe7tFS1MpM77iVvvqTP23Ytb52zjYd12e2 2UW9N/6XOb53I7nP8yKJR1n/CpZkjzRXLvXoL4NPoZXczaO/rUWTvKoW559e7beugjx3 5hXCw2j/AHqKB74ZYZB+dL4DmDBZXBJwUvIjPXAEgDnmYZeMdVpG0a8hoKf/AM5bVT+e Fdjr+FxiLnMiahHAOy0NzQ6ti3jxbnBGB+gH0uNVijJR0iITiNbfXCBAkG5DCziOQzKf Tfeg== X-Gm-Message-State: APjAAAVE3Jv2VxGlnctmRg5Yk/HMQrbkJfPLeS5uC+FLZHHSA1XxLYzz kkTcTZLLseJG7nPqBk2RQiklPXKbARoZOnRwtnGpDw== X-Google-Smtp-Source: APXvYqxEgwhoRE6aIt5XZfd1nFOgdIuzH+lCk2O9N3+Z7rylUPcI90Ae93dbP3gdZGxeO2C+/09yn9S4IENEWypkWqk= X-Received: by 2002:a5d:4ecd:: with SMTP id s13mr31504787wrv.216.1574673275605; Mon, 25 Nov 2019 01:14:35 -0800 (PST) MIME-Version: 1.0 References: <20191122112621.204798-1-glider@google.com> <20191122112621.204798-11-glider@google.com> <20191124194401.GA957@kunai> In-Reply-To: <20191124194401.GA957@kunai> From: Alexander Potapenko Date: Mon, 25 Nov 2019 10:14:24 +0100 Message-ID: Subject: Re: [PATCH RFC v3 10/36] kmsan: add KMSAN runtime To: Wolfram Sang Cc: Vegard Nossum , Dmitry Vyukov , Linux Memory Management List , Al Viro , adilger.kernel@dilger.ca, Andrew Morton , Andrey Konovalov , Andrey Ryabinin , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , hch@infradead.org, Christoph Hellwig , darrick.wong@oracle.com, David Miller , Dmitry Torokhov , Eric Biggers , Eric Dumazet , Eric Van Hensbergen , Greg Kroah-Hartman , Harry Wentland , Herbert Xu , Ilya Leoshkevich , Ingo Molnar , jasowang@redhat.com, Jens Axboe , Marek Szyprowski , Marco Elver , Mark Rutland , "Martin K . Petersen" , Martin Schwidefsky , Matthew Wilcox , "Michael S. Tsirkin" , Michal Simek , Petr Mladek , Qian Cai , Randy Dunlap , Robin Murphy , Sergey Senozhatsky , Steven Rostedt , Takashi Iwai , "Theodore Ts'o" , Thomas Gleixner , Vasily Gorbik Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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 Sun, Nov 24, 2019 at 8:44 PM Wolfram Sang wrote: > > Hi, > > > - dropped kmsan_handle_i2c_transfer() > > Could you elaborate a little why it was there in the beginning and why > it is gone now? Previous patchset version didn't handle DMA and iomap-based I/O properly, so there was a bunch of KMSAN calls scattered across the codebase that were initializing memory at the places where data was copied from devices. Now they are all gone, because v3 supports DMA/iomap. > Thanks, > > Wolfram > --=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, Halimah DeLaine Prado Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg