kern/56087: dual-CPU macppc panic: pr_phinpage_check: [pmap_upvopl] ...

[he%NetBSD.org@localhost]

>Number:         56087
>Category:       kern
>Synopsis:       dual-CPU macppc panic: pr_phinpage_check: [pmap_upvopl] ...
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Apr 01 09:00:01 +0000 2021
>Originator:     he%NetBSD.org@localhost
>Release:        NetBSD 9.99.81
>Organization:
	I try...
>Environment:
System: NetBSD bramley.urc.uninett.no 9.99.81 NetBSD 9.99.81 (GENERIC.MP) #0: Tue Mar 30 19:45:04 UTC 2021  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/macppc/compile/GENERIC.MP macppc
Architecture: powerpc
Machine: macppc
>Description:
	
	I recently had to re-install this "mirror drive doors" G4
	powermac because I got errors writing to the (old, re-used)
	drive.

	While extracting the new src.tar.gz, and both running "systat
	-w 5 vm" and just after having started "top", I see out of the
	corner of my eye the console screen go black, and once it's
	back up again, I see this backtrace in the message buffer:

[ 4454.5805633] panic: pr_phinpage_check: [pmap_upvopl] item 0x4c87ce0 poolid 36 != 1
[ 4454.5805633] cpu0: Begin traceback...
[ 4454.5805633] 0x37707a80: at vpanic+0x12c
[ 4454.5805633] 0x37707ab0: at panic+0x50
[ 4454.5805633] 0x37707af0: at pool_put+0x580
[ 4454.5805633] 0x37707b40: at pmap_pvo_free_list.isra.0+0x6c
[ 4454.5805633] 0x37707b60: at pmap_remove+0x10c
[ 4454.5805633] 0x37707b90: at uvm_pagermapout+0x24
[ 4454.5805633] 0x37707bc0: at genfs_getpages+0x12d4
[ 4454.5805633] 0x37707cd0: at VOP_GETPAGES+0x6c
[ 4454.5805633] 0x37707d10: at ufs_balloc_range+0x184
[ 4454.5805633] 0x37707d80: at ffs_write+0x67c
[ 4454.5805633] 0x37707e10: at VOP_WRITE+0x50
[ 4454.5805633] 0x37707e40: at vn_write+0x140
[ 4454.5805633] 0x37707e70: at dofilewrite+0x8c
[ 4454.5805633] 0x37707ec0: at syscall+0x2a4
[ 4454.5805633] 0x37707f20: user SC trap #4 by 0xfdd2451c: srr1=0xd032
[ 4454.5805633]             r1=0xffffe4e0 cr=0x44444484 xer=0 ctr=0xfdd24514
[ 4454.5805633] cpu0: End traceback...
[ 4454.5805633] halting CPU 1
[ 4454.5805633] dumpsys: TBD
[ 4454.5805633] rebooting

	With this particular drive I've not seen any write errors on
	the console, so I don't think that is the cause of this problem.

	I'm running with both CPUs active if that makes any
	difference:

[   1.0000000] mainbus0 (root)
[   1.0000000] cpu0 at mainbus0: 7455 (Revision 3.3), ID 0 (primary)
[   1.0000000] cpu0: HID0 0x84d0c1bc<EMCP,TBEN,HIGH_BAT_EN,NAP,DPM,ICE,DCE,XBSEN,SGE,BTIC,LRSTK,FOLD,BHT>, powersave: 1
[   1.0000000] cpu0: 1250.00 MHz, 256KB L2 cache no parity, 2MB no-parity L3 cache (DDR SRAM) at 6:1 ratio
[   1.0000000] cpu1 at mainbus0: 7455 (Revision 3.3), ID 1
[   1.0000000] cpu1: HID0 0x84d0c1bc<EMCP,TBEN,HIGH_BAT_EN,NAP,DPM,ICE,DCE,XBSEN,SGE,BTIC,LRSTK,FOLD,BHT>, powersave: 1
[   1.0000000] cpu1: 1250.00 MHz, 256KB L2 cache no parity, 2MB no-parity L3 cache (DDR SRAM) at 6:1 ratio

	I realize that this *may* be a powerpc- or even macppc-
	specific problem, but so far I've categorized is as a "kern"
	bug.  (I did notice that the 9.1 MP kernel doesn't really come
	properly up, seemingly stuck before initializing IPsec, though
	that's probably a different problem.)

>How-To-Repeat:
	See above.

>Fix:
	No idea, sorry...