--- Begin Message ---
- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: linux-image-2.6.12-1-686: dismally slow throughput to usb flash drive
- From: Chris Roddy <croddy@emory.edu>
- Date: Tue, 23 Aug 2005 12:54:24 -0400
- Message-id: <E1E7c2b-0001HB-02@thorkelin.library.emory.edu>
Package: linux-image-2.6.12-1-686
Version: 2.6.12-5
Severity: normal
after installing linux-image-2.6.12-1-686, i get very, very slow writes
to my USB 2.0 flash drive (around 30kb/s). messages in syslog indicate
that the kernel has recognized it as a high-speed device, ehci_hcd is
inserted, and so forth... disk writes are just inexplicably slow. there
is no excessive CPU usage or any other indication of what the problem
might be.
using kernel-image-2.6.8-2-686, i get the expected ~12mb/s write speeds,
using the same drive, same usb port, and the same mount options.
disk reads, strangely enough, do not seem to be affected at all, or at
least not nearly to the same degree.
the drive is a 1GB Lexar Jumpdrive, JDA1GB-00-501. from lsusb:
Bus 004 Device 005: ID 05dc:a400 Lexar Media, Inc.
the USB controller information from lspci:
0000:00:1d.0 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 01)
0000:00:1d.1 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 01)
0000:00:1d.2 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 01)
0000:00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB 2.0 EHCI Controller (rev 01)
(fwiw, i have noticed the same problem on a completely different
machine, on kernel i compiled from linux-source-2.6.12, adding the
it8212 patch and trimming the configuration, so it may be an issue
with the source. then again, it could be a coincidence).
-- System Information:
Debian Release: testing/unstable
APT prefers unstable
APT policy: (990, 'unstable'), (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.8-2-686
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Versions of packages linux-image-2.6.12-1-686 depends on:
ii coreutils [fileutils] 5.2.1-2 The GNU core utilities
ii initrd-tools 0.1.82 tools to create initrd image for p
ii module-init-tools 3.2-pre8-1 tools for managing Linux kernel mo
linux-image-2.6.12-1-686 recommends no packages.
-- no debconf information
--- End Message ---
--- Begin Message ---
- To: 324724-done@bugs.debian.org
- Cc: Chris Roddy <croddy@emory.edu>
- Subject: Re: dismally slow throughput to usb flash drive
- From: Moritz Muehlenhoff <jmm@inutil.org>
- Date: Sat, 25 Jul 2009 11:31:24 +0200
- Message-id: <20090725093124.GA12427@galadriel.inutil.org>
- In-reply-to: <20081113230849.GA8650@galadriel.inutil.org>
- References: <4542563B.70108@emory.edu> <20081113230849.GA8650@galadriel.inutil.org>
On Fri, Nov 14, 2008 at 12:08:49AM +0100, Moritz Muehlenhoff wrote:
> On Fri, Oct 27, 2006 at 02:55:55PM -0400, Chris Roddy wrote:
> > I installed linux-image-2.6.18-1-686 version 2.6.18-3 from sid earlier
> > today, rebooted, and tested the exact same pieces of hardware as I was
> > using in the initial report. There does not appear to be any significant
> > change in write throughput when the device is mounted using the 'sync'
> > option: disk writes are at about 46 kB/sec.
> >
> > As before, writes are fast when the device is not mounted 'sync', and
> > reads are fast in either case.
> >
> > Shall I build linux-source-2.6.18 version 2.6.18-3 and try that? Or is
> > there something else?
>
> Does this error still occur with more recent kernel versions?
>
> If you're running Etch, could you try to reproduce this bug
> with the 2.6.24 based kernel added in 4.0r4?
> http://packages.qa.debian.org/l/linux-2.6.24.html
No further feedback, closing the bug.
If anyone reencounters the problem, please reopen this bug.
Cheers,
Moritz
--- End Message ---