The second thread was a fork (by me) of a previous thread on the 
best way to perform network interface renaming. Unfortunately it 
contained two subjects.

     My main subject was questionning the necessity of renaming network 
interfaces (with my answer to the question). Since nobody argumented 
that renaming was necessary, it is clear for me that renaming is a 
feature invented to give more importance to Udev and isn't necessary at all.

     The OT subjet was about Mdev (a KISS hotplugger) and wether it was 
sufficient. Several technical advices have been provided on the subject, 
plus too many digressions. Maybe all usable technical advices have been 
collected and I will have to compile them and compare them with 
available online documents. I must thank the people who gave technical 
insights on the matter.

     For your thread, I have the personnal impression that the fashion, 
a decade ago, was to delegate to userspace as much as possible of the OS 
tasks. Unfortunately all the work of developping the userspace servers 
has been taken over by RedHat in a bad way and, because of that, Linus 
is now taking it back into the kernel, because he doesn't want to 
participate in userspace. Of course he will never tell it that way.

     Didier