/dev/drum versus libkvm?

[walt]

Hiten Pandya wrote:

    ...we wanted to make use of sysctls for retrieving the
    information instead of making libkvm calls.  Such sysctl calls
    are currently used in a redundant manner...
Thanks, that tells me what I needed to know.

One last question technical question about libkvm:  I see several uses
of kvm_openfiles in DF code (e.g. pstat) where kvm_close is never
called.  This leaves me wondering what kvm_close is used for.