Bug#567996: more info

[Marc Pignat <marc.pignat@hevs.ch>]

Hi all!

I have the same problem here : The usb writing performance drops when writing
on usb-storage device.

* There is only a problem when writing, reading is ok, writing to a filesystem,
  to the partition or to the hdd make the problem happen.

* I suspect this is not the same issue as the one ubuntu one, because I don't have
  usb reset device messages.

* I have tested the same kernel version on a x86 machine and is unaffected, but
  it has another usb controller.



I can't test a x86 kernel on my amd64 machine, because it is used in production...


Best regards

Marc




Some more info about the test machines:
affected-machine:
cat /proc/version
Linux version 2.6.32-trunk-amd64 (Debian 2.6.32-5) (ben@decadent.org.uk) (gcc version 4.3.4 (Debian 4.3.4-6) ) #1 SMP Sun Jan 10 22:40:40 UTC 2010
lspci | grep EHCI
00:12.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:13.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller


working-machine:
cat /proc/version
Linux version 2.6.32-trunk-686 (Debian 2.6.32-5) (ben@decadent.org.uk) (gcc version 4.3.4 (Debian 4.3.4-6) ) #1 SMP Sun Jan 10 06:32:16 UTC 2010
lspci | grep EHCI
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)