From: "jianchao.wang" <jianchao.w.wang@oracle.com>
To: Marc Gonzalez <marc.w.gonzalez@free.fr>,
Christoph Hellwig <hch@infradead.org>,
Jens Axboe <axboe@kernel.dk>
Cc: fsdevel <linux-fsdevel@vger.kernel.org>,
linux-block <linux-block@vger.kernel.org>,
SCSI <linux-scsi@vger.kernel.org>,
Joao Pinto <jpinto@synopsys.com>,
Subhash Jadavani <subhashj@codeaurora.org>,
Sayali Lokhande <sayalil@codeaurora.org>,
Can Guo <cang@codeaurora.org>,
Asutosh Das <asutoshd@codeaurora.org>,
Vijay Viswanath <vviswana@codeaurora.org>,
Venkat Gopalakrishnan <venkatg@codeaurora.org>,
Ritesh Harjani <riteshh@codeaurora.org>,
Vivek Gautam <vivek.gautam@codeaurora.org>,
Jeffrey Hugo <jhugo@codeaurora.org>,
Maya Erez <merez@codeaurora.org>,
Evan Green <evgreen@chromium.org>,
Matthias Kaehlcke <mka@chromium.org>,
Douglas Anderson <dianders@chromium.org>,
Stephen Boyd <swboyd@chromium.org>,
Tomas Winkler <tomas.winkler@intel.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Alim Akhtar <alim.akhtar@samsung.com>,
Avri Altman <avri.altman@wdc.com>,
Bart Van Assche <bart.vanassche@wdc.com>,
Martin Petersen <martin.petersen@oracle.com>,
Bjorn Andersson <bjorn.andersson@linaro.org>
Subject: Re: dd hangs when reading large partitions
Date: Tue, 22 Jan 2019 11:12:49 +0800 [thread overview]
Message-ID: <b3910158-83d6-21fe-1606-33e88912404a@oracle.com> (raw)
In-Reply-To: <985b340c-623f-6df2-66bd-d9f4003189ea@free.fr>
Hello
On 1/21/19 11:22 PM, Marc Gonzalez wrote:
> Well, now we know for sure that the clk_scaling_lock is a red herring.
> I applied the patch below, and still the system locked up:
>
> # dd if=/dev/sde of=/dev/null bs=1M status=progress
> 3892314112 bytes (3.9 GB, 3.6 GiB) copied, 50.0042 s, 77.8 MB/s
>
> I can't seem to get the RCU stall warning anymore. How can I get
> to the bottom of this issue?
>
Can you detail the system 'locked up' ?
dd hangs there ? any hung task warning log ?
hang forever or just hang for a relatively long time.
And what is the status of the dd when it hangs ?
Can you take some samples of the /proc/<dd's pid>/status and /proc/<dd's pid>/stack during the hang ?
And also would you please share the dmesg log and config ?
Since always fails with buffered read with fixed bytes,
what is the capacity of your system memory ?
Thanks
Jianchao
next prev parent reply other threads:[~2019-01-22 3:11 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-18 12:10 dd hangs when reading large partitions Marc Gonzalez
2019-01-18 13:39 ` Ming Lei
2019-01-18 14:54 ` Marc Gonzalez
2019-01-18 15:18 ` jianchao.wang
2019-01-18 17:38 ` Marc Gonzalez
2019-01-18 17:48 ` Jens Axboe
2019-01-18 17:51 ` Bart Van Assche
2019-01-18 19:00 ` Jens Axboe
2019-01-19 9:56 ` Christoph Hellwig
2019-01-19 14:37 ` Jens Axboe
2019-01-19 16:09 ` Bart Van Assche
2019-01-21 8:33 ` Christoph Hellwig
2019-01-19 19:47 ` Marc Gonzalez
2019-01-19 20:45 ` Marc Gonzalez
2019-01-21 8:33 ` Christoph Hellwig
2019-01-21 15:22 ` Marc Gonzalez
2019-01-22 3:12 ` jianchao.wang [this message]
2019-01-22 10:59 ` Marc Gonzalez
2019-01-22 12:49 ` Marc Gonzalez
2019-01-22 16:17 ` Marc Gonzalez
2019-01-22 16:22 ` Greg Kroah-Hartman
2019-01-22 19:07 ` Evan Green
2019-01-23 3:10 ` jianchao.wang
2019-02-06 16:16 ` Marc Gonzalez
2019-02-06 17:05 ` Marc Gonzalez
2019-02-07 10:44 ` Marc Gonzalez
2019-02-07 16:56 ` Marc Gonzalez
2019-02-08 15:33 ` Marc Gonzalez
2019-02-08 15:49 ` Bart Van Assche
2019-02-09 11:57 ` Marc Gonzalez
2019-02-11 16:36 ` Marc Gonzalez
2019-02-11 17:27 ` Marc Gonzalez
2019-02-12 15:26 ` [SOLVED] " Marc Gonzalez
2019-01-18 19:27 ` Douglas Gilbert
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