Re: udev is too slow creating devices

[Chris Meadors]

On Tue, 2004-09-14 at 20:33 +0200, Giacomo A. Catenazzi wrote:
> Hello people!
> 
> When I load a module (with modprobe) the relative device is too
> slowly created with udev, so modprobe return before the device
> is really created. Because of this my init.d script will
> fail with modular microcode + udev
> 
> test case:
> 
> udev + modular microcode:
> $ modprobe -r microcode
> $ modprobe microcode ; microcode_ctl -u
> => microcode_ctl does NOT find the device
> 
> $ modprobe -r microcode
> $ modprobe microcode ; sleep 3; microcode_ctl -u
> => microcode_ctl FIND the device
> 
> [without udev it is OK, so I assume no errors
> in modprobe]
> 
> Is it a bug of udev?
> Else what workaround I can use? (sleep is to slow for
> an already to sloow system initialitation)

I don't know of a proper fix, but a better work around would be to
use...

while [ ! -c /dev/cpu/microcode ]; do sleep 0; done

...in place of your "sleep 3".  Replacing the /dev/cpu/microcode with
the actual character device that microcode_ctl is looking for.

-- 
Chris

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