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Date:      Tue, 1 Sep 1998 13:36:11 -0400 (EDT)
From:      Jeff Aitken <jaitken@dimension.net>
To:        FreeBSD-gnats-submit@FreeBSD.ORG
Subject:   kern/7797: panic: pmap_release
Message-ID:  <199809011736.NAA22623@gizmo.dimension.net>

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>Number:         7797
>Category:       kern
>Synopsis:       System halted with "panic: pmap_release: freeing held page table page"
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Sep  1 10:40:00 PDT 1998
>Last-Modified:
>Originator:     Jeff Aitken
>Organization:
Dimension Enterprises, Inc.
>Release:        FreeBSD 2.2.7-RELEASE i386
>Environment:

	Freshly installed 2.2.7-RELEASE (from the CDROM).  Compiled
	a new kernel, but did not include anything that wasn't in
	use on the machine when it was running 2.2.6.  Linux
	compatibility is enabled, FWIW...

>Description:

	While compiling a couple of programs simultaneously, the
	system halted with these messages:

	panic: pmap_release: freeing held page table page
	syncing disks... 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 giving up

	System is a Pentium-based workstation with 64MB RAM, EIDE
	HD, Matrox Millennium II, SB AWE32, nothing out of the ordinary
	at all.

	System was running for months under 2.2.6 just fine until a
	HD crashed and forced me to reinstall (and upgrade in the
	process).  At the time of the crash, X was running and I was
	compiling a couple of programs (elm and perl5).

	I can supply the kernel config file if that would be helpful.
	BTW, this pr was sent from a machine running 2.2.6, so I
	changed the 'Release' tag above to 2.2.7.


>How-To-Repeat:

	Dunno.  Hope not to repeat it. ;-)

>Fix:
	
	

>Audit-Trail:
>Unformatted:

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