Re: dd hangs when reading large partitions

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To: Marc Gonzalez <marc.w.gonzalez@xxxxxxx>, linux-mm <linux-mm@xxxxxxxxx>, linux-block <linux-block@xxxxxxxxxxxxxxx>
Subject: Re: dd hangs when reading large partitions
From: Bart Van Assche <bvanassche@xxxxxxx>
Date: Fri, 08 Feb 2019 07:49:46 -0800
Cc: Jianchao Wang <jianchao.w.wang@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, fsdevel <linux-fsdevel@xxxxxxxxxxxxxxx>, SCSI <linux-scsi@xxxxxxxxxxxxxxx>, Joao Pinto <jpinto@xxxxxxxxxxxx>, Jeffrey Hugo <jhugo@xxxxxxxxxxxxxx>, Evan Green <evgreen@xxxxxxxxxxxx>, Matthias Kaehlcke <mka@xxxxxxxxxxxx>, Douglas Anderson <dianders@xxxxxxxxxxxx>, Stephen Boyd <swboyd@xxxxxxxxxxxx>, Tomas Winkler <tomas.winkler@xxxxxxxxx>, Adrian Hunter <adrian.hunter@xxxxxxxxx>, Alim Akhtar <alim.akhtar@xxxxxxxxxxx>, Avri Altman <avri.altman@xxxxxxx>, Bart Van Assche <bart.vanassche@xxxxxxx>, Martin Petersen <martin.petersen@xxxxxxxxxx>, Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>, Ming Lei <ming.lei@xxxxxxxxxx>, Omar Sandoval <osandov@xxxxxx>, Roman Gushchin <guro@xxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>
In-reply-to: <66419195-594c-aa83-c19d-f091ad3b296d@free.fr>
References: <f792574c-e083-b218-13b4-c89be6566015@free.fr> <398a6e83-d482-6e72-5806-6d5bbe8bfdd9@oracle.com> <ef734b94-e72b-771f-350b-08d8054a58f3@kernel.dk> <20190119095601.GA7440@infradead.org> <07b2df5d-e1fe-9523-7c11-f3058a966f8a@free.fr> <985b340c-623f-6df2-66bd-d9f4003189ea@free.fr> <b3910158-83d6-21fe-1606-33e88912404a@oracle.com> <d082bdee-62e5-d470-b63b-196c0fe3b9fb@free.fr> <5132e41b-cb1a-5b81-4a72-37d0f9ea4bb9@oracle.com> <7bd8b010-bf0c-ad64-f927-2d2187a18d0b@free.fr> <0cfe1ed2-41e1-66a4-8d98-ebc0d9645d21@free.fr> <d91e8342-4672-d51d-1bde-74e910e5a959@free.fr> <27165898-88c3-ab42-c6c9-dd52bf0a41c8@free.fr> <66419195-594c-aa83-c19d-f091ad3b296d@free.fr>

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.

Follow-Ups:
- Re: dd hangs when reading large partitions
  - From: Marc Gonzalez
- Re: dd hangs when reading large partitions
  - From: Marc Gonzalez

References:
- dd hangs when reading large partitions
  - From: Marc Gonzalez
- Re: dd hangs when reading large partitions
  - From: jianchao.wang
- Re: dd hangs when reading large partitions
  - From: Jens Axboe
- Re: dd hangs when reading large partitions
  - From: Christoph Hellwig
- Re: dd hangs when reading large partitions
  - From: Marc Gonzalez
- Re: dd hangs when reading large partitions
  - From: Marc Gonzalez
- Re: dd hangs when reading large partitions
  - From: jianchao.wang
- Re: dd hangs when reading large partitions
  - From: Marc Gonzalez
- Re: dd hangs when reading large partitions
  - From: jianchao.wang
- Re: dd hangs when reading large partitions
  - From: Marc Gonzalez
- Re: dd hangs when reading large partitions
  - From: Marc Gonzalez
- Re: dd hangs when reading large partitions
  - From: Marc Gonzalez
- Re: dd hangs when reading large partitions
  - From: Marc Gonzalez
- Re: dd hangs when reading large partitions
  - From: Marc Gonzalez

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