From james@jraynard.demon.co.uk  Tue Jun 11 17:52:48 1996
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Date: Wed, 12 Jun 1996 00:05:22 GMT
From: James Raynard <james@jraynard.demon.co.uk>
Reply-To: james@jraynard.demon.co.uk
To: FreeBSD-gnats-submit@freebsd.org
Subject: Panic: vm_page_free while installing new kernel
X-Send-Pr-Version: 3.2

>Number:         1311
>Category:       kern
>Synopsis:       Panic: vm_page_free while installing new kernel
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    dyson
>State:          closed
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jun 11 18:00:01 PDT 1996
>Closed-Date:    Sun Nov 9 07:58:58 PST 1997
>Last-Modified:  Sun Nov  9 08:01:32 PST 1997
>Originator:     James Raynard
>Release:        FreeBSD 2.2-CURRENT i386
>Organization:
James Raynard, Edinburgh, Scotland
>Environment:

-current as of Monday night (11th)

>Description:

Left computer unattended (and idle) for about 20 minutes to build a
debug kernel. On return, copied and stripped kernel, then did 'make
install' which resulted in a panic.

As I had just clobbered the unstripped version of the old kernel, I
was not able to get any meaningful information from kgdb. However, I
managed to note the following while in DDB:-

panic: vm_page_free: pindex(0), busy(0), PG_BUSY(0), hold(21)
trace:
_panic
_vm_page_freechk_and_unqueue
_vm_page_free_zero
_pmap_release
_vmspace_free
_cpu_wait
_wait1
_wait4
_syscall
_Xsyscall
syscall 7

>How-To-Repeat:

>Fix:
>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->dyson 
Responsible-Changed-By: wosch 
Responsible-Changed-When: Sun Sep 15 08:29:45 PDT 1996 
Responsible-Changed-Why:  
Johns area         
State-Changed-From-To: open->closed 
State-Changed-By: jraynard 
State-Changed-When: Sun Nov 9 07:58:58 PST 1997 
State-Changed-Why:  
Fixed in the VM changes made shortly afterwards. 
>Unformatted:
