kernel vs user-space

From: Nelson (tanginhw@comp.nus.edu.sg)
Date: Sun Sep 17 2000 - 02:39:05 EST


hi,

        i would like to examine the contributing factors in deciding
whether authentication mechanisms such as a RADIUS client, be implemented
in kernel space or user-space. i'm not trying to start a flame-war, just
want to have a clearer concept of what should and what should not be in
the kernel.

        for example, a web server (khttpd) was included into the 2.3 and
2.4 kernels, mainly for efficiency reasons. off-hand, some reasons i could
think of for implementations in user-space are:

        - easily extensible
        - flexible
        - easier to implement

        so, what are the arguments for and against implementing the
authentication mechanism in kernel space and user-space?

        thanx.

Nelson
-------------------------------------------
"You will never walk alone"

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