per-device sysctls

[M. Warner Losh]

In message: <xzp7jy9lmnf.fsf at dwp.des.no>
            des at des.no (Dag-Erling Smørgrav) writes:
: "M. Warner Losh" <imp at bsdimp.com> writes:
: > How is this different than the sysctl stuff that already exsists for
: > this and is accessed by devinfo?
: 
:  1) it is immensely easier to access

From whose point of view.  devinfo is easier to type than sysctl dev
by one character :-).  However,

:  2) it gives drivers a well-defined place to put their per-device
:     sysctl variables - devinfo doesn't address that issue at all

That is a good reason to transitioning to this, so long as we can come
up with a good way to represent detached nodes.  This also gives us a
good place to hang other actions we may want to send to device drivers
like power down, etc.

Warner