Patch-ID# 100565-02
Keywords: processes, zombies, handle, command, defunct, zombie, fuser
Synopsis: SunOS 4.1.1: RFS fuser command does not handle zombies and defunct processes
Date: 27/Mar/92

SunOS release: 4.1.1

Unbundled Product: 

Unbundled Release: 

Topic: RFS fuser zombies

BugId's fixed with this patch: 1085741

Architectures for which this patch is available: sun4 sun4c

Patches which may conflict with this patch: 

Obsoleted by: 

Files included with this patch: fuser

Problem Description: 
--------------------

rfuadmin executes fuser(8) to kill all processes  using the  resource,
unmounts  the resource, and attempts to mount the resource again.

the problem is, every now and again rfuadmin gets the error....

vm_check: can't read seg 0

what is happening is that fuser is looking through the proc table and examining
the vnodes associated with that process. If the mapping is no longer valid it prints
this message and exits.

But this situation could happen if the process in question is a zombie/defunct and
init has not had chance to clean up.


Install Instructions: 
---------------------

AS ROOT:

1.  mv /usr/kvm/fuser /usr/kvm/fuser.fcs

Copy new fuser to the correct place
2   cp fuser /usr/kvm/fuser

3. Use "chmod" & "chown" commands to set the file permissions on /usr/kvm/fuser
   to match those below.

-rwxr-xr-x  1 root     staff       16423 Oct  2 15:47 /usr/kvm/fuser*