Hi Markus,
markus reichelt wrote:
* Matthias Kaehlcke <mkaehlcke@xxxxxxx> wrote:
i totally agree that unplugging the device without unmounting it
previously isn't how things should be done and can have side
effects. but is it really obvious that the timer softirq isn't
executed during ~250ms because an USB device is uncleanly
unplugged?
I've had my fair share of USB fun myself, yeah.
The problem is difficult to track, you are using an old kernel. If
it's possible to use a recent kernel, I'd try that first.
i tried it with 2.6.26.3 (have some prob with USB and 2.6.27) but with
the same result :(
adding more traces i see that the softirq is raised by the timer ISR but
not executed
Also, the USB setup: Is the stick connected directly or via hub? What
about scheduler? PREEMPT? I'm just taking a wild guess here.
it's connected directly. PREEMPT is enabled, i'll try what happens when
disabling it
The USB mailing list at linux-usb@xxxxxxxxxxxxxxx might be a better
place to ask, people there have a deeper knowledge about things that
could cause your problem. Worth a try.
thanks for the pointer, i'll give it a try
thanks for you response!
begin:vcard
fn:Matthias Kaehlcke
n:Kaehlcke;Matthias
org:Electronic Engineering Solutions;Dept. de Software
adr:;;C/ Sant Ferran, 10-16 bajos;Barcelona;;08031;Spain
email;internet:mkaehlcke@xxxxxxx
title:Ingeniero de Firmware
tel;work:93 407 30 80
tel;fax:93 433 56 71
x-mozilla-html:FALSE
url:http://www.e2s.net
version:2.1
end:vcard
