RE: My vote against eepro* removal

[kus Kusche Klaus]

From: Evgeniy Polyakov [mailto:johnpol@xxxxxxxxxxx] 
> Each MDIO read can take upto 2 msecs (!) and at least 20 
> usecs in e100,
> and this runs in timer handler.
> Concider attaching (only compile tested) patch which moves 
> e100 watchdog
> into workqueue.

Tested the patch. Works and has the expected effects:

Fully preemptible kernel: 
No change: 500 us delay at rtprio 1, no delay at higher rtprio.
(you just moved the 500 us piece of code from one rtprio 1 kernel 
thread to another rtprio 1 kernel thread).

Kernel with desktop preemption:
Originally: Threads at any rtprio suffered from 500 us delay.
With your patch: Only rtprio 1 threads suffer from 500 us delay,
no delay at higher rtprio.

-- 
Klaus Kusche                 (Software Development - Control Systems)
KEBA AG             Gewerbepark Urfahr, A-4041 Linz, Austria (Europe)
Tel: +43 / 732 / 7090-3120                 Fax: +43 / 732 / 7090-6301
E-Mail: kus@xxxxxxxx                                WWW: www.keba.com
 
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