Subject: port-i386/15377: pmap_page_remove: mapped page has invalid pv_ptp field
To: None <>
From: Manuel Bouyer <>
List: netbsd-bugs
Date: 01/26/2002 14:35:51
>Number:         15377
>Category:       port-i386
>Synopsis:       pmap_page_remove: mapped page has invalid pv_ptp field
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jan 26 05:36:00 PST 2002
>Originator:     Manuel Bouyer
>Release:        NetBSD 1.5.2
System: NetBSD 1.5.2+siop NetBSD 1.5.2+siop (ASIM) #0: Sun Nov 11 17:39:28 MET 2001 i386
(1.5.2 sources with siop(4) fixes).

	This machine is a mail/http/ftp/anoncvs server, reasonably loaded.
	Tonight it paniced. On the console there was:
	pmap_page_remove: pg=0xc0393560: va=341000, pv_ptp=0xc03a8448
	pmap_page_remove: PTP's phy addr: actual=0, recorded=26a1000
	panic: pmap_page_remove: mapped managed page has invalid pv_ptp field
	syncing disks:

	and was hung at this point, so no core dump :(

	unknown, it's the first time I get it, the machine has been
	reliable for more than a year. I send this in case it rings a bell
	for someone, or someone else see this panic too.