I just started experimenting with uml.

My existing system ( the host ? ) is still running RedHat 7.2 with the
latest kernel from RedHat for that release ( 2.4.20-7 ) plus MPPE from
pptp-linux.

Started with the last UML RPM kernel, and with tom brt root fs.



What I wanted to do now is experiment with:

1) A kernel with FreeSWAN built-in

This seems to be straightforward as the latest 2.4 kernels from:

http://kernels.usermodelinux.org/kernels/

.... shows some of them with FreeSWAN included.
So I assume I would just need to replace the existing /usr/bin/linux
with the one from the above website, or just name the binary differently
( e.g.: linux-2.4.21 )



2) Experiment / try-out 2.5 / 2.6-test kernels

Again, there is a 2.5 kernel from uml's website.
But how do I try out the latest 2.6-test kernels ?

Can I just take the last 2.5 kernel from uml's website, run UML, then
apply the the all the patches up to 2.6.0-testx ( given that 2.6 already
have uml built-in ) on the UML kernel... given that 2.6 already have uml
built-in ?


3) Are the root filesystems related to the UML kernel ? e.g. Do I have
to use specific root filesystems to make use of the UML kernels or
vice-versa ?