Sleeping nfsd's?

[Jim Hudgens]

MACHINE: Sun3/280 
OS:      SunOS 4.0.1
DESCRIPTION:

One of the 4 nfsd's appears to go into a long deep sleep.  The most
visible evidence is that the load average on an idle system is near 1.0,
instead of 0.0.  I have seen this situation several times, and have found
no correlation with any other activity.  In the ps output below, the
system had been up 10 hours.  Screenblank, dbx, and several shelltools
were running on an idle login.  

This is real intermittent, and somehow seems to correct itself.  However,
the process seems to stay in this state for hours.

There is no harm in this situation at all, as far as I know.  Anyone knows
what might cause this?  In following listing, process 92 is somehow
blocked.  Ethernet problems?  Disk problems?

# ps -aux
USER       PID %CPU %MEM   SZ  RSS TT STAT START  TIME COMMAND
root        91  0.0  0.0   40    0 ?  S    10:56   4:18  (nfsd)
root        92  0.0  0.0   40    0 ?  D    10:56   0:51  (nfsd)

# ps axl
      F UID   PID  PPID CP PRI NI  SZ  RSS WCHAN    STAT TT  TIME COMMAND
   8001   0    91    89  0   1  0  40    0 socket   S    ?   4:18  (nfsd)
   8001   0    92    89  0  -2  0  40    0 kernelma D    ?   0:51  (nfsd)

# vmstat
 procs     memory              page              faults                  cpu
 r b w   avm   fre  re at  pi  po  fr  de  sr x0 x1 d2 d3  in  sy  cs us sy id
 0 1 0     0  6864   0  3  10   3   6   0   0  2  1  0  0  21  35  25 22  5 73

  Jim Hudgens
  hudgens at ray.met.fsu.edu