Subject: kern/10585: i386 kernel panics: invalid pv_ptp field
To: None <>
From: Wolfgang Helbig <helbig@Informatik.BA-Stuttgart.DE>
List: netbsd-bugs
Date: 07/17/2000 20:40:15
>Number:         10585
>Category:       kern
>Synopsis:       i386 kernel panics: invalid pv_ptp field
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jul 14 11:40:01 PDT 2000
>Originator:     Wolfgang Helbig
>Release:        NetBSD-current (yesterday) and snapshot 20000621
System: NetBSD rvc1 1.4X NetBSD 1.4X (RVC1) #9: Sun Apr 23 00:06:18 CEST 2000 helbig@rvc1:/usr/src/sys/arch/i386/compile/RVC1 i386

	The GENERIC kernel built from current yesterday and the snapshots
	20000621 netbsd.GENERIC panic, (and some kernels inbetween
	which I built during the last weeks).
	It panics during boot, right after starting a sh. In single
	multi user boot. Very repetive: The kernel debugger says:
	(from snap 20000621)

	pmap_page_remove: pg=0xc07a2000: va=bfbfd000 pv_ptp = 0xc07a2ab8
	pmap_page_remove: PTP's phys addr: actual = 0 recorded = 7fda000

	panic: mapped managed page has invalid pv_ptp field.

	Stopped in stty at cpu_Debugger + 0x4:  leave

	I rebuilt user land and kernel with sources from yesterday, even
	twice, and without success.

	I installed current boot blocks, didn't change.

	My old kernel (see section System in this problem report) boots fine,
	and I'm using it right know.

	Boot the kernel from snap 20000621 on a i386.
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