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Date:      Wed, 12 Jun 1996 00:05:22 GMT
From:      James Raynard <james@jraynard.demon.co.uk>
To:        FreeBSD-gnats-submit@freebsd.org
Subject:   kern/1311: Panic: vm_page_free while installing new kernel
Message-ID:  <199606120005.AAA00472@jraynard.demon.co.uk>
Resent-Message-ID: <199606120100.SAA12192@freefall.freebsd.org>

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>Number:         1311
>Category:       kern
>Synopsis:       Panic: vm_page_free while installing new kernel
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jun 11 18:00:01 PDT 1996
>Last-Modified:
>Originator:     James Raynard
>Organization:
James Raynard, Edinburgh, Scotland
>Release:        FreeBSD 2.2-CURRENT i386
>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:
>Audit-Trail:
>Unformatted:



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