From: Patrik Nilsson <nipatriknilsson@gmail.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Greg KH <gregkh@linuxfoundation.org>, linux-usb@vger.kernel.org
Subject: Re: high speed data to usb disk makes the kernel think that is has been unmounted
Date: Tue, 11 Aug 2020 23:14:09 +0200 [thread overview]
Message-ID: <ef2937d6-f8a8-fbc6-decd-eeb4af94e863@gmail.com> (raw)
In-Reply-To: <20200811193150.GA344152@rowland.harvard.edu>
On 11/08/2020 21:31, Alan Stern wrote:
> On Tue, Aug 11, 2020 at 08:34:53PM +0200, Patrik Nilsson wrote:
>> Hi Greg,
>>> Can you provide kernel logs? Odds are the disk disconnects itself as it
>>> takes too much power or something.
>> udev-kernel logs can be found:
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1886172
> The bug report doesn't seem to contain any dmesg kernel logs showing
> what happens when the problem occurs.
I'm compiling the latest kernel to supply the kernel logs when done
testing. It takes a while.
>
> Also, the bug report indicates that you started to do a bisection
> looking for the kernel version where the problem first appears, but
> there's no mention of the final result.
There were no result. For an unknown reason I haven't the bug behavior
in the 4.15 series of the kernel (Ubuntu Mate Bionic), but when I tried
later I had. Maybe it was when I ran Ubuntu Mate Focal with 4.15 series
of kernel that triggered the bug.
It was a failed attempt to iterate to the kernel version that worked.
It is the same hardware.
> The bug report also indicates that one of your tests involves copying
> /dev/zero to a mounted disk device! That is highly likely to crash the
> kernel regardless of what the hardware does. What happens if you
> unmount the disk before running the test?
The ssd disk contains no partition data. It is not mounted.
> Alan Stern
Patrik
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next prev parent reply other threads:[~2020-08-11 21:14 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-11 17:19 high speed data to usb disk makes the kernel think that is has been unmounted Patrik Nilsson
2020-08-11 17:56 ` Greg KH
2020-08-11 18:34 ` Patrik Nilsson
2020-08-11 18:39 ` Greg KH
2020-08-11 19:31 ` Alan Stern
2020-08-11 21:14 ` Patrik Nilsson [this message]
2020-08-12 6:14 ` Greg KH
2020-08-16 15:31 ` Patrik Nilsson
2020-08-18 8:55 ` Greg KH
2020-08-18 18:22 ` Patrik Nilsson
2020-08-18 18:34 ` Alan Stern
2020-09-15 16:43 ` Patrik Nilsson
2020-09-15 18:24 ` Alan Stern
2020-12-05 11:49 ` Patrik Nilsson
2020-12-05 15:39 ` Alan Stern
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