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=-0.8 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 67F4CC282C4 for ; Tue, 12 Feb 2019 15:27:04 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3113820863 for ; Tue, 12 Feb 2019 15:27:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3113820863 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=free.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id CA60F8E0005; Tue, 12 Feb 2019 10:27:03 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C7D5A8E0001; Tue, 12 Feb 2019 10:27:03 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B93758E0005; Tue, 12 Feb 2019 10:27:03 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by kanga.kvack.org (Postfix) with ESMTP id 649DF8E0001 for ; Tue, 12 Feb 2019 10:27:03 -0500 (EST) Received: by mail-wm1-f70.google.com with SMTP id t133so1138323wmg.4 for ; Tue, 12 Feb 2019 07:27:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:subject:from :to:cc:references:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=dcMm0kE5qxkntCrevwhlMtNR5mhhW1J4gCjlyHdLZrQ=; b=AAcRGHhq9s/xhjfclSDLMyAc8DGlq6nMPIyIB+8id82MyynfJGm9JfEBTkkJvXye/Y T2TWr300SnTPM3hGBBYrItGlWBsKq0WiBKo0ixapEnlLZP5OLNMErXL3pnD0tlf98Qh4 OiGjKxkXrb7QpNJ3JdkRjQ9yzWvl4al4RtsDz7ACs5VsROHFRWEF3BEqvXJvEwXPkn5R TL5Xwo09gP7Qcrr+jjNHJI7FwWBHLXXXt4L0aOgZ79rPIMM0UFwHuniWCA90dp57z9Ij pCP1zMFOcgbblGNqL3zjTe6qeA8fJU1Nk7EHKy/ap/KRcx1Q80B67ClHI43d9yM3SSb4 p7bw== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of marc.w.gonzalez@free.fr designates 212.27.42.3 as permitted sender) smtp.mailfrom=marc.w.gonzalez@free.fr X-Gm-Message-State: AHQUAuYMA+4G5k/tNQGouOBjbcUMTwOysmuhZ0fnC6vqsyMBlkRzvWKF ISw3ds/z5Gztbe48E9iMdiaGNILiCGMd76+lOZhoOYXdcOakd/6tFtZ323HTKK9CbVwaGYu+F1N vxXhJDxo9SChpDmZL/xFjIOGUd084UACExDcg+oR+yVeY93i3usYcWt7N8BPfHVgh6Q== X-Received: by 2002:adf:afce:: with SMTP id y14mr2826480wrd.219.1549985222993; Tue, 12 Feb 2019 07:27:02 -0800 (PST) X-Google-Smtp-Source: AHgI3IakapcG66EsKDRparj09MCQhfGsyDo2BSpzUli3ZtoMLgZfCq0rMzbXkCjxsut2dvVDnb7a X-Received: by 2002:adf:afce:: with SMTP id y14mr2826422wrd.219.1549985222212; Tue, 12 Feb 2019 07:27:02 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1549985222; cv=none; d=google.com; s=arc-20160816; b=n31FQBcAWy3BNQAsMZtP121H4jLShbeMAUXGtfOaXNCRyooVd30l9YYSQkTt+yE6oM cusWFEfVqQ4XnKwIbw3WrCei6siE0UgE9SQdvP2saHkFvYPNyc0cfKEDVkMuCa1vQelM XCySYiyb0uoMTP2v5wKMkdbZDZbH/N9Z1ZgW12fUR+EAwThdLfGc8r93ds7yq99hkQSx lnRJKT/G4mZrYqpUtviEkXNlE5SGj0Puqvc7Jq4Sikp+8Iuh3qAzC3rJZmcnJrhvaKtD eBWKNE4Pm2X4kH95R3Ia/k3A7SlOnckPbgf7N2MclwNo/Cvaz23WHmuScYsY9GsMkZfz e7kg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:references:cc:to:from:subject; bh=dcMm0kE5qxkntCrevwhlMtNR5mhhW1J4gCjlyHdLZrQ=; b=iGGKpgPl+wO50rWe1K3qeLEoypU/U2j7VylOdsz8/tZoatRth/ROHl478+Mq2jiFNI gEqIwpLI0++2XWyM83w7bv0Hlqbj65Iu/Xq+9dgz3FW/xTTbUcwGxyqqNTDG/LxdIEjT fyWJQ/rZdbDic7EqtIofUs02A9BwlGTnjl2STVYX0SSRWJWAHeTXe5sKDvdtM0hew5fg wAmuWHEIW1nRoO130+HUBxJslirDRqs9wOA1HVdpB4YLq5xw3oR2bNJb4lKZ0egiZXiM WQYAO5tj1SoMyJCPy87Xi2ICjzQJWS3gAi1TPnvlkso79Rc2DNQwb496yxMdJZxh2pvY NAaA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of marc.w.gonzalez@free.fr designates 212.27.42.3 as permitted sender) smtp.mailfrom=marc.w.gonzalez@free.fr Received: from smtp3-g21.free.fr (smtp3-g21.free.fr. [212.27.42.3]) by mx.google.com with ESMTPS id e9si6838305wrr.359.2019.02.12.07.27.02 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 12 Feb 2019 07:27:02 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of marc.w.gonzalez@free.fr designates 212.27.42.3 as permitted sender) client-ip=212.27.42.3; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of marc.w.gonzalez@free.fr designates 212.27.42.3 as permitted sender) smtp.mailfrom=marc.w.gonzalez@free.fr Received: from [192.168.108.68] (unknown [213.36.7.13]) (Authenticated sender: marc.w.gonzalez) by smtp3-g21.free.fr (Postfix) with ESMTPSA id 45D1F13F8C0; Tue, 12 Feb 2019 16:26:10 +0100 (CET) Subject: [SOLVED] dd hangs when reading large partitions From: Marc Gonzalez To: Bart Van Assche , linux-mm , linux-block Cc: Jianchao Wang , Christoph Hellwig , Jens Axboe , fsdevel , SCSI , Jeffrey Hugo , Evan Green , Matthias Kaehlcke , Douglas Anderson , Stephen Boyd , Tomas Winkler , Adrian Hunter , Bart Van Assche , Martin Petersen , Bjorn Andersson , Ming Lei , Omar Sandoval , Roman Gushchin , Andrew Morton , Michal Hocko , James Bottomley References: <398a6e83-d482-6e72-5806-6d5bbe8bfdd9@oracle.com> <20190119095601.GA7440@infradead.org> <07b2df5d-e1fe-9523-7c11-f3058a966f8a@free.fr> <985b340c-623f-6df2-66bd-d9f4003189ea@free.fr> <5132e41b-cb1a-5b81-4a72-37d0f9ea4bb9@oracle.com> <7bd8b010-bf0c-ad64-f927-2d2187a18d0b@free.fr> <0cfe1ed2-41e1-66a4-8d98-ebc0d9645d21@free.fr> <27165898-88c3-ab42-c6c9-dd52bf0a41c8@free.fr> <66419195-594c-aa83-c19d-f091ad3b296d@free.fr> <1549640986.34241.78.camel@acm.org> <690af800-1cd2-3e68-94d9-bc4825790837@free.fr> <493e04e4-849d-8f25-95e3-408f775fab64@free.fr> Message-ID: <734274cc-d22b-5fe9-1650-b13c692c5b9d@free.fr> Date: Tue, 12 Feb 2019 16:26:10 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <493e04e4-849d-8f25-95e3-408f775fab64@free.fr> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit 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 11/02/2019 18:27, Marc Gonzalez wrote: > A colleague pointed out that some memory areas are reserved downstream. > Perhaps the FW goes haywire once the kernel touches reserved memory? Bingo! FW quirk. https://patchwork.kernel.org/patch/10808173/ Once the reserved memory range is extended, I am finally able to read large partitions: # dd if=/dev/sda of=/dev/null bs=1M 55256+0 records in 55256+0 records out 57940115456 bytes (58 GB, 54 GiB) copied, 786.165 s, 73.7 MB/s Thanks to everyone who provided suggestions and guidance. Regards.