Path: utzoo!utgpu!cunews!bnrgate!brtph3!brchh104!brchs1!bnr.ca!rice.edu!sun-spots-request
From: jpc@avdms8.msfc.nasa.gov (J. Porter Clark)
Newsgroups: comp.sys.sun
Subject: Summary: Can't swap biod and nfsd?
Keywords: SunOS
Message-ID: <650@brchh104.bnr.ca>
Date: 8 Dec 90 00:52:00 GMT
Sender: news@brchh104.bnr.ca
Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
X-Original-Date: Fri, 30 Nov 90 16:56:23 CST
X-Refs:  Original: v9n384
X-Sun-Spots-Digest: Volume 9, Issue 392, message 3
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The question I asked, stripped to the essentials, was:

>Is there some reason that biod and nfsd never seem to get swapped out?

Since the clue to the answer is in the manual, I apologize for asking!
All of the responses I received were more or less along the lines of the
first one I received, which was from tar@math.ksu.edu (Tim Ramsey):

>nfsd and biod run as system processes.  The /usr/etc/nfsd program
>just opens a UDP socket, registers it with the portmapper, and invokes
>the nfssvc(2) system call.  That system call never returns (under normal
>circumstances).  The man page for nfssvc(2) under 4.1 says:
>
>   Both system calls result in kernel-only processes with
>   user memory discarded.
>
>Since kernel memory is never swapped, nfsd and biod can't be swapped.

To date, I have also received similar data from:

ekrell@ulysses.att.com (Eduardo Krell)
davide%cadillac.cad.mcc.com@mcc.com (David Eckelkamp)
convex!datri@uxc.cso.uiuc.edu (Anthony A. Datri)

Thanks to all who responded!

Porter Clark
NASA/MSFC
Communications Systems Branch
EB33
Huntsville, AL 35812
Phone: (205)544-3661
FAX: (205)544-9582
Internet: jpc@avdms8.msfc.nasa.gov