UDev startup 30-45s or more

[iSteve <isteve@rulez.cz>]

Greetings,
I've recently upgraded udev from 069 onto 084, and kernel from 2.6.13 
onto 2.6.15.1.

For coldplugging, I've implemented the init script mentioned on this 
mailing list, which writes "add" into uevent file for everything I want 
to have recognized by udev, ie. /sys/bus/*/devices/*/uevent 
/sys/class/*/*/uevent /sys/block/*/uevent /sys/block/*/*/uevent. This is 
approx. 700 files.

Writing into all these files already takes approx. 10-15s, but I do not 
mind that, as I believe that can be optimised later.

What I consider troublesome is that processing the queue takes over 20 
more seconds, totalling at about 30-45 seconds, which is more than all 
other init scripts altogether. I wonder, how can I optimise it? What am 
I doing wrong?

The init script creates /dev on tmpfs (the rootfs is read-only), runs 
udev --daemon and writes 'add' in correct order (as used on the init 
script posted on this mailing list) into the uevent files. Then waits 20 
seconds or until /dev/.udev/queue disappears, whichever comes first 
(unfortunately, /dev/.udev/queue doesn't disappear in the given time).

I am using udev to load modules as well, however, it has no effect if I 
have loaded them prior to running udev.

Thanks in advance for any help.
  -- iSteve


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