i386/66249: Constant 1.00 loadavg without apparent cause

[Krzysztof Kowalik]

>Number:         66249
>Category:       i386
>Synopsis:       Constant 1.00 loadavg without apparent cause
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue May 04 04:50:28 PDT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Krzysztof Kowalik
>Release:        5.2.1
>Organization:
AGH-University of Science and Technology
>Environment:
FreeBSD oink.transfer.edu.pl 5.2.1-RELEASE-p5 FreeBSD 5.2.1-RELEASE-p5 #3: Fri Apr 30 13:56:50 CEST 2004     root at oink.transfer.edu.pl:/usr/src/sys/i386/compile/OINK  i386
      
>Description:
    constant 1.00 loadavg, with top saying: 

CPU states:  0.0% user,  0.0% nice,  0.0% system,  1.6% interrupt, 98.4% 
idle 

(With both SMP and non-SMP kernels, with the default scheduler)

After recompiling the kernel with SHED_ULE, loadavg dropped to the constant 0.99, so it still does not exactly look right.

  PID USERNAME PRI NICE   SIZE    RES STATE    TIME   WCPU    CPU COMMAND
   11 root     -16    0     0K    12K RUN      8:48 97.17% 97.17% idle
   27 root     -44 -163     0K    12K WAIT     0:07  0.00%  0.00% swi1: net
   28 root     -48 -167     0K    12K WAIT     0:01  0.00%  0.00% swi8: tty:sio clock
[...]

And kern/21155 pr does not exactly include the possible fix (nor hints).
>How-To-Repeat:
to reboot and wait, nothing more.
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: