kern/79245: jls loops

[Niklas Saers]

>Number:         79245
>Category:       kern
>Synopsis:       jls loops
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Mar 26 09:30:02 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Niklas Saers
>Release:        FreeBSD 5.4-PRERELEASE i386
>Organization:
Registrar A/S
>Environment:
System: FreeBSD cima.registrar.no 5.4-PRERELEASE FreeBSD 5.4-PRERELEASE #9: Tue Mar 22 14:05:25 CET 2005 root at cima.registrar.no:/usr/obj/usr/src/sys/cima i386

sources cvsup'ed from RELENG_5 March 22nd, 2005. Problem repeats on all 5.4-PRERELEASE servers I've tried so far

>Description:
I've got a script that creates ~200 jails at boot-up, and to display status it simply does a "jls|wc -l".
In roughly 1 out of 50 cases, jls will loop until killed. From top:

 2937 root     126    0  1248K   644K RUN    1   0:29 23.27% 22.75% jls

and from ps aux:

root     2937 21.2  0.0  1248   644 con  R+    9:40AM   0:31.08 jls

This did not happen with a recent cvsup from RELENG_5_3, new with RELENG_5

>How-To-Repeat:
Fire up many jails, throwing in jls statements at will

>Fix:

No fix yet, but I can try to reproduce the error after having applied patches.


>Release-Note:
>Audit-Trail:
>Unformatted: