From owner-freebsd-bugs  Wed Apr 19  7: 0: 4 2000
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Date: Wed, 19 Apr 2000 06:59:39 -0700 (PDT)
From: kokg@geo.vu.nl
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/18096: random crashes probably caused by lockmgr panics
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>Number:         18096
>Category:       kern
>Synopsis:       random crashes probably caused by lockmgr panics
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Apr 19 07:00:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Gerard Kok
>Release:        4.0-RELEASE
>Organization:
Vrije Universiteit Amsterdam, Faculty of Earth Sciences
>Environment:
FreeBSD prugna.geo.vu.nl 4.0-RELEASE FreeBSD 4.0-RELEASE #0: Wed Mar 15 02:16:55 GMT 2000     jkh@monster.cdrom.com:/usr/src/sys/compile/GENERIC  i386
for example (it's happening on all our 4.0-RELEASE machines)
>Description:
I recently upgraded some of our FreeBSD printservers from 2.2.[56]-RELEASE
to 4.0-RELEASE, and now I'm experiencing random crashes on all ten of them, about
once every week. Usually there's nothing in the logs, but today the following
message:
Apr 19 15:18:35 prugna /kernel: panic: lockmgr: pid 81526, not exclusive lock ho
lder 81492 unlocking
Apr 19 15:18:35 prugna /kernel:
Apr 19 15:18:35 prugna /kernel: syncing disks... panic: getnewbuf: locked buf
Apr 19 15:18:35 prugna /kernel: Uptime: 7d2h52m19s
Apr 19 15:18:35 prugna /kernel: Automatic reboot in 15 seconds - press a key on
the console to abort
Apr 19 15:18:35 prugna /kernel: Rebooting...
>How-To-Repeat:
Just wait ;) (I haven't figured out a way yet to immediately trigger the bug).
>Fix:
Not known.

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


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