From: Andrea Vai <andrea.vai@unipv.it>
To: linux-usb@vger.kernel.org
Subject: Slow I/O on USB media
Date: Thu, 30 May 2019 15:18:14 +0200 [thread overview]
Message-ID: <2a9e1be71a2c6c940dac904752fdd34129745444.camel@unipv.it> (raw)
Hi,
I have a problem as described at [1], sorry for misunderstanding the
right place to report it.
The last kernel I can easily install and test was 5.0.17, but please
tell me if I should install a newer version (or anything else I should
do). I just tried installing 5.1.5 but suddenly stopped as I have
problem in compilation (please be patient with me, because I am not an
expert).
Here follows the bug report content:
I am experiencing slow I/O performance since kernel 5.0.1. File
operations are roughly 10 times slower than they used to be using
kernel up to 4.20. The problem is present when I use an USB pendrive,
and does not happen when I copy a file from an internal SATA to
another internal SATA hard disk.
You can see the discussion in the dar (backup software) mailing list
[2], because I first noticed the problem using dar, but then
discovered that also usual file operations such as "cp" suffer the
same problem.
Steps to Reproduce:
Copy a file (e.g. roughly 1GB) from an internal SATA HD to an USB
pendrive using "cp", using kernel 5.0.1+
Actual Results:
The file is copied in about 12 minutes
Expected Results:
The file is copied in about 1 minute (as it happens with kernel up to
4.20.13)
Running Fedora 29 on a Desktop PC.
Kernels found to be affected: e.g. 5.0.7, 5.0.9, 5.0.10, 5.0.13,
5.0.14, 5.0.17.
Thanks, and bye,
Andrea
[1] https://bugzilla.kernel.org/show_bug.cgi?id=203757
[2] https://sourceforge.net/p/dar/mailman/dar-support/thread/d490b5733731cbbb526d759c858a4b11a52fd179.camel%40unipv.it/#msg36660380
next reply other threads:[~2019-05-30 13:18 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-30 13:18 Andrea Vai [this message]
2019-05-30 13:25 ` Slow I/O on USB media Greg KH
2019-06-03 11:13 ` Andrea Vai
2019-06-04 5:43 ` Greg KH
2019-06-04 7:26 ` Andrea Vai
2019-06-05 7:36 ` Andrea Vai
2019-06-05 14:26 ` Alan Stern
2019-06-05 15:46 ` Andrea Vai
2019-06-05 16:11 ` Alan Stern
2019-06-05 14:55 ` Greg KH
[not found] ` <0c2adde7154b0a6c8b2ad7fc5258916731b78775.camel@unipv.it>
2019-06-05 16:23 ` Andrea Vai
2019-06-05 17:39 ` Greg KH
2019-06-06 8:41 ` Andrea Vai
2019-06-06 9:03 ` Andrea Vai
2019-06-06 14:00 ` Andrea Vai
2019-06-06 14:30 ` Alan Stern
2019-06-06 14:47 ` Greg KH
2019-06-07 7:59 ` Andrea Vai
2019-06-08 7:43 ` Andrea Vai
2019-06-08 9:29 ` Andrea Vai
2019-06-10 14:38 ` Greg KH
2019-06-11 6:48 ` Andrea Vai
2019-06-10 14:40 ` Alan Stern
2019-06-10 14:55 ` Andrea Vai
2019-06-10 16:20 ` Alan Stern
2019-06-17 15:52 ` Andrea Vai
2019-06-17 16:14 ` Alan Stern
2019-06-17 16:34 ` Andrea Vai
2019-06-17 17:28 ` Alan Stern
2019-07-01 17:52 ` Andrea Vai
2019-07-01 18:57 ` Alan Stern
2019-06-10 14:37 ` Greg KH
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