Hi list !

We use a fairly large usb tree with about 12 hubs and 18 high speed devices
to build a control surface.
With kernel 2.6.8.1 it took about 8 seconds from plugin of the first hub
(where all other hubs/devices are connected) to the root hub until all
hubs/devices where "found" and announced in "/var/log/messages".
With kernel 2.6.15 this time increased to about 17seconds. That doubles the
time we need to get our surface working.
The distribution we use is a "self made" one, so in this test we only
changed the kernel and the appropriate drivers. udev and the hotplug
environment were the same in both cases.

This is perhaps a stupid question, but is there a possibility to speed up
the connect handling (without rewriting the whole usb drivers ...) in the
newer kernel ?

Any hints are welcome.

Regards,
Thorsten

---------------------------------------------------------
Thorsten Wiedemer
Lawo AG
Am Oberwald 8
D-76437 Rastatt
phone: +49 (0)7222/1002-758
email: [EMAIL PROTECTED]
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