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([2620:15c:2cd:203:5cdc:422c:7b28:ebb5]) by smtp.gmail.com with ESMTPSA id x2sm5458013pfx.78.2019.02.08.07.49.47 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 08 Feb 2019 07:49:48 -0800 (PST) Message-ID: <1549640986.34241.78.camel@acm.org> Subject: Re: dd hangs when reading large partitions From: Bart Van Assche To: Marc Gonzalez , linux-mm , linux-block Cc: Jianchao Wang , Christoph Hellwig , Jens Axboe , fsdevel , SCSI , Joao Pinto , Jeffrey Hugo , Evan Green , Matthias Kaehlcke , Douglas Anderson , Stephen Boyd , Tomas Winkler , Adrian Hunter , Alim Akhtar , Avri Altman , Bart Van Assche , Martin Petersen , Bjorn Andersson , Ming Lei , Omar Sandoval , Roman Gushchin , Andrew Morton , Michal Hocko Date: Fri, 08 Feb 2019 07:49:46 -0800 In-Reply-To: <66419195-594c-aa83-c19d-f091ad3b296d@free.fr> 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> Content-Type: text/plain; charset="UTF-7" X-Mailer: Evolution 3.26.2-1 Mime-Version: 1.0 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 Fri, 2019-02-08 at 16:33 +-0100, Marc Gonzalez wrote: +AD4 Does anyone see what's going sideways in the no-flag case? Hi Marc, Does this problem only occur with block devices backed by the UFS driver or does this problem also occur with other block drivers? Thanks, Bart.