Hi,

While booting with 
OpenBSD 7.3-current (GENERIC.MP) #153: Sat Jul 15 16:24:01 MDT 2023
    dera...@macppc.openbsd.org:/usr/src/sys/arch/macppc/compile/GENERIC.MP
Machine paniced in rc reordering.

reordering: ld.so libc libcrypto sshdpanic: pool_do_get: vp: page empty
Stopped at      db_enter+0x24:  lwz r11,12(r1)
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*286053  66409      0    0x100001          0    0  sh
db_enter() at db_enter+0x20
panic(908034) at panic+0x158
pool_do_get(0,6099c84b,68969083) at pool_do_get+0x370
pool_get(0,66b85b77) at pool_get+0xc4
pmap_vp_enter(1fff1a4,1fff0d8,e8024cb0,d15639f) at pmap_vp_enter+0xa4
pmap_enter(e8024e38,e8024db4,1f1f738,5f1d38bd,2420d042) at pmap_enter+0x1e0
uvm_fault_lower(e8024e58,0,e8024da0,427814) at uvm_fault_lower+0x900
uvm_fault(0,0,0,0) at uvm_fault+0x20c
trap(0) at trap+0x238
trapagain() at trapagain+0x4
--- trap (type 0x10400) ---
End of kernel: 0xfffe6810
end trace frame: 0xfffe6810, count: 5
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb{0}> [-- MARK -- Tue Jul 18 00:50:00 2023]

ddb{0}> trace
db_enter() at db_enter+0x20
panic(908034) at panic+0x158
pool_do_get(0,6099c84b,68969083) at pool_do_get+0x370
pool_get(0,66b85b77) at pool_get+0xc4
pmap_vp_enter(1fff1a4,1fff0d8,e8024cb0,d15639f) at pmap_vp_enter+0xa4
pmap_enter(e8024e38,e8024db4,1f1f738,5f1d38bd,2420d042) at pmap_enter+0x1e0
uvm_fault_lower(e8024e58,0,e8024da0,427814) at uvm_fault_lower+0x900
uvm_fault(0,0,0,0) at uvm_fault+0x20c
trap(0) at trap+0x238
trapagain() at trapagain+0x4
--- trap (type 0x10400) ---
End of kernel: 0xfffe6810
end trace frame: 0xfffe6810, count: -10

ddb{0}> show panic
*cpu0: pool_do_get: vp: page empty

ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
*66409  286053  13174      0  7    0x100001                sh
 13174  311294  57279      0  3    0x100089  sigsusp       sh
 89034  307491      1      0  3    0x100080  kqread        resolvd
 34301  100707  86871     77  3    0x100092  kqread        dhcpleased
 54366   69070  86871     77  3    0x100092  kqread        dhcpleased
 86871  362535      1      0  3        0x80  kqread        dhcpleased
 98114  186276   3166    115  3    0x100092  kqread        slaacd
 56689   38807   3166    115  3    0x100092  kqread        slaacd
  3166  469092      1      0  3    0x100080  kqread        slaacd
 57279   55427  76112      0  3    0x100089  sigsusp       sh
 76112   10156      1      0  3    0x100083  piperd        sh
 22123  127478      0      0  3     0x14200  bored         smr
 82693  204230      0      0  3  0x40014200                idle1
 68536  190476      0      0  3     0x14200  pgzero        zerothread
  4888  454542      0      0  3     0x14200  aiodoned      aiodoned
 82385  475789      0      0  3     0x14200  syncer        update
 78872   23710      0      0  3     0x14200  cleaner       cleaner
 20471  388019      0      0  3     0x14200  reaper        reaper
 20260  360822      0      0  3     0x14200  pgdaemon      pagedaemon
 76712  160794      0      0  3     0x14200  usbtsk        usbtask
 37718   40013      0      0  3     0x14200  usbatsk       usbatsk
 89295  189330      0      0  3     0x14200  bored         sensors
 98074  514874      0      0  3     0x14200  bored         softnet3
 90862  520613      0      0  3     0x14200  bored         softnet2
 11008   97579      0      0  3     0x14200  bored         softnet1
 13848  442973      0      0  3     0x14200  bored         softnet0
  6945  155368      0      0  3     0x14200  bored         systqmp
 97083  254902      0      0  3     0x14200  bored         systq
 27429  306600      0      0  3  0x40014200  bored         softclock
 12027  511656      0      0  3  0x40014200                idle0
     1  106847      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper

ddb{0}> show uvm
Current UVM status:
  pagesize=4096 (0x1000), pagemask=0xfff, pageshift=12
  500848 VM pages: 1622 active, 17805 inactive, 1 wired, 442406 free (55607 
zero)
  min  10% (25) anon, 10% (25) vnode, 5% (12) vtext
  freemin=16694, free-target=22258, inactive-target=0, wired-max=166949
  faults=106581, traps=0, intrs=12014, ctxswitch=42307 fpuswitch=12977
  softint=5524, syscalls=166272, kmapent=10
  fault counts:
    noram=0, noanon=0, noamap=0, pgwait=0, pgrele=0
    ok relocks(total)=19763(19794), anget(retries)=51906(0), amapcopy=21501
    neighbor anon/obj pg=16262/31978, gets(lock/unlock)=34379/21189
    cases: anon=46026, anoncow=5943, obj=32098, prcopy=3869, przero=20398
  daemon and swap counts:
    woke=0, revs=0, scans=0, obscans=0, anscans=0
    busy=0, freed=0, reactivate=0, deactivate=0
    pageouts=0, pending=0, nswget=0
    nswapdev=1
    swpages=786491, swpginuse=0, swpgonly=0 paging=0
  kernel pointers:
    objs(kern)=0xb31c78

After reboot fsck made no progress, after Ctrl-C kenrel paniced again.

load: 4.00  cmd: fsck_ffs 64619 [running] 17623.46u 11.61s 98% 1913k^M
6102496318219727.f: phase 2, directory 30155/51251
^Cpanic: kernel diagnostic assertion "anon->an_page == NULL" failed: file 
"/usr/s
rc/sys/uvm/uvm_anon.c", line 132
Stopped at      db_enter+0x24:  lwz r11,12(r1)
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*108779  77589      0     0x14000      0x200    0  reaper
db_enter() at db_enter+0x20
panic(907c94) at panic+0x158
__assert(30f81100,7c5c278,e7fc9de0,2bba9c) at __assert+0x2c
uvm_anfree_list(4574ec37,f) at uvm_anfree_list+0x22c
amap_wipeout(abda90) at amap_wipeout+0x174
amap_unref(9495aaa4,3146aab8,0,1) at amap_unref+0x70
uvm_unmap_detach(be34be3a,b896611d) at uvm_unmap_detach+0x9c
uvm_map_teardown(0) at uvm_map_teardown+0x1c8
uvmspace_free(b3313c) at uvmspace_free+0x60
uvm_exit(b3313c) at uvm_exit+0x30
reaper(ab6c04) at reaper+0x138
proc_trampoline() at proc_trampoline+0x14
end trace frame: 0x0, count: 3
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb{0}> [-- MARK -- Tue Jul 18 22:00:00 2023]

Subsequent reboots and fsck causes other panics.

load: 0.22  cmd: fsck_ffs 57239 [running] 22.08u 5.84s 67% 1210k^M
6102496318219727.f: phase 1, inode 2053312/2643840
panic: trap type 400 srr1 40009032 at fffffffc (_end+0xff4cacd4) lr ffffffff
Stopped at      db_enter+0x24:  lwz r11,12(r1)
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*165623  57239      0    0x100003          0    0  fsck_ffs
db_enter() at db_enter+0x20
panic(8f605f) at panic+0x158
trap(abda90) at trap+0xc50
trapagain() at trapagain+0x4
--- trap (type 0x400) ---
_end() at 0xfffffffb
splx(0) at splx+0x30
brelse(e7ff6bb8) at brelse+0x44c
_end() at 0x7518e9e0
mtx_enter_try(be34be3a) at mtx_enter_try+0x5c
splx(1000) at splx+0x30
mtx_leave(e51f29e5) at mtx_leave+0x90
pool_lock_mtx_leave(b2a2f0) at pool_lock_mtx_leave+0x20
pool_get(0,4553ae2) at pool_get+0x128
pmap_enter(e7ff6e38,e7ff6db4,4d7d340,e3f2a63e,2420d022) at pmap_enter+0x480
end trace frame: 0xe7ff6d20, count: 0
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb{0}> [-- MARK -- Tue Jul 18 22:05:00 2023]

I was able to repair file system with this kernel:
OpenBSD 7.3-current (GENERIC.MP) #143: Wed Jun 21 05:29:27 MDT 2023
    dera...@macppc.openbsd.org:/usr/src/sys/arch/macppc/compile/GENERIC.MP

Regress testing succeeded with this kernel:
OpenBSD 7.3-current (GENERIC.MP) #151: Tue Jul 11 18:15:19 MDT 2023
    dera...@macppc.openbsd.org:/usr/src/sys/arch/macppc/compile/GENERIC.MP

So I guess something in pmap or uvm is wrong.  It happend between
Tue Jul 11 and Sat Jul 15 macppc snapshot.

Full console output with bad kernel, hangs at reordering sshd:
>> OpenBSD/macppc BOOT 1.11
boot> boot bsd
booting /ht/pci@5/k2-sata-root/k2-sata@0/disk@0:bsd: 10173072+526488 
[420631+104+449376+466020]=0x0
[ using 1336664 bytes of bsd ELF symbol table ]
Copyright (c) 1982, 1986, 1989, 1991, 1993
        The Regents of the University of California.  All rights reserved.
Copyright (c) 1995-2023 OpenBSD. All rights reserved.  https://www.OpenBSD.org

OpenBSD 7.3-current (GENERIC.MP) #153: Sat Jul 15 16:24:01 MDT 2023
    dera...@macppc.openbsd.org:/usr/src/sys/arch/macppc/compile/GENERIC.MP
real mem = 2147483648 (2048MB)
avail mem = 2051371008 (1956MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root: model PowerMac7,3
cpu0 at mainbus0: 970 (Revision 0x202): 1800 MHz
cpu1 at mainbus0: 970 (Revision 0x202): 1800 MHz
mem0 at mainbus0
spdmem0 at mem0: 1GB DDR SDRAM non-parity PC3200CL3.0
spdmem1 at mem0: 1GB DDR SDRAM non-parity PC3200CL3.0
spdmem2 at mem0: 512MB DDR SDRAM non-parity PC3200CL2.5
spdmem3 at mem0: 512MB DDR SDRAM non-parity PC3200CL2.5
memc0 at mainbus0: u3 rev 0xb3
kiic0 at memc0 offset 0xf8001000
iic0 at kiic0
lmtemp0 at iic0 addr 0x4a: ds1775
maxtmp0 at iic0 addr 0x4c: max6690
maxtmp1 at iic0 addr 0x4e: max6690
"cy28508" at iic0 addr 0x69 not configured
"cy2213" at iic0 addr 0x65 not configured
fcu0 at iic0 addr 0xaf
"pca9556" at iic0 addr 0x18 not configured
adc0 at iic0 addr 0x2c: ad7417
"24256" at iic0 addr 0x50 not configured
"pca9556" at iic0 addr 0x19 not configured
adc1 at iic0 addr 0x2d: ad7417
"24256" at iic0 addr 0x51 not configured
"dart" at memc0 offset 0xf8033000 not configured
"mpic" at memc0 offset 0xf8040000 not configured
mpcpcibr0 at mainbus0 pci: u3-agp
pci0 at mpcpcibr0 bus 0
0:16:0: mem address conflict 0xb0000000/0x10000000
pchb0 at pci0 dev 11 function 0 "Apple U3 AGP" rev 0x00
appleagp0 at pchb0
agp0 at appleagp0: aperture at 0x0, size 0x10000000
radeondrm0 at pci0 dev 16 function 0 "ATI Radeon 9600" rev 0x00: can't reserve 
framebuffer space
"ATI Radeon 9600 XT Sec" rev 0x00 at pci0 dev 16 function 1 not configured
ht0 at mainbus0: u3-ht, 6 devices
pci1 at ht0 bus 0
hpb0 at pci1 dev 1 function 0 "Apple U3" rev 0x00: 85 sources
pci2 at hpb0 bus 1
macobio0 at pci2 dev 7 function 0 "Apple K2 Macio" rev 0x60
openpic0 at macobio0 offset 0x40000: version 0x4614 feature 770302 LE
macgpio0 at macobio0 offset 0x50
"pmu-interrupt" at macgpio0 offset 0x9 not configured
"programmer-switch" at macgpio0 offset 0x11 not configured
"modem-reset" at macgpio0 offset 0x1d not configured
"modem-power" at macgpio0 offset 0x1e not configured
"fcu-interrupt" at macgpio0 offset 0x15 not configured
"fcu-hw-reset" at macgpio0 offset 0x3a not configured
"slewing-done" at macgpio0 offset 0x23 not configured
"codec-input-data-mux" at macgpio0 offset 0xb not configured
"line-input-detect" at macgpio0 offset 0xc not configured
"codec-error-irq" at mpio0 offset 0x17 not configured
"codec-irq" at macgpio0 offset 0x18 not configured
"headphone-mute" at macgpio0 offset 0x1f not configured
"amp-mute" at macgpio0 offset 0x20 not configured
"hw-reset" at macgpio0 offset 0x24 not configured
"line-output-mute" at macgpio0 offset 0x25 not configured
"codec-clock-mux" at macgpio0 offset 0x26 not configured
"escc-legacy" at macobio0 offset 0x12000 not configured
zs0 at macobio0 offset 0x13000: irq 22,23
zstty0 at zs0 channel 0: console
zstty1 at zs0 channel 1
kiic1 at macobio0 offset 0x18000
iic1 at kiic1
aoa0 at macobio0 offset 0x10000: irq 30,1,2
"timer" at macobio0 offset 0x15000 not configured
adb0 at macobio0 offset 0x16000
apm0 at adb0: battery flags 0x9, 0% charged
piic0 at adb0
iic2 at piic0
"fans" at macobio0 offset 0x4c not configured
audio0 at aoa0
ohci0 at pci2 dev 8 function 0 "Apple K2 USB" rev 0x00: irq 27, version 1.0, 
legacy support
ohci1 at pci2 dev 9 function 0 "Apple K2 USB" rev 0x00: irq 28, version 1.0, 
legacy support
usb0 at ohci0: USB revision 1.0
uhub0 at usb0 configuration 1 interface 0 "Apple OHCI root hub" rev 1.00/1.00 
addr 1
usb1 at ohci1: USB revision 1.0
uhub1 at usb1 configuration 1 interface 0 "Apple OHCI root hub" rev 1.00/1.00 
addr 1
ppb0 at pci1 dev 2 function 0 "Apple U3" rev 0x00
pci3 at ppb0 bus 5
bwi0 at pci3 dev 1 function 0 "Broadcom BCM4306" rev 0x03: irq 57, address 
00:16:cb:f7:9f:42
em0 at pci3 dev 4 function 0 "Intel 82546GB" rev 0x03: irq 54, address 
00:1b:21:30:3c:50
em1 at pci3 dev 4 function 1 "Intel 82546GB" rev 0x03: irq 54, address 
00:1b:21:30:3c:51
ohci2 at pci3 dev 11 function 0 "NEC USB" rev 0x43: irq 63, version 1.0
ohci3 at pci3 dev 11 function 1 "NEC USB" rev 0x43: irq 63, version 1.0
ehci0 at pci3 dev 11 function 2 "NEC USB" rev 0x04: irq 63
usb2 at ehci0: USB revision 2.0
uhub2 at usb2 configuration 1 interface 0 "NEC EHCI root hub" rev 2.00/1.00 
addr 1
usb3 at ohci2: USB revision 1.0
uhub3 at usb3 configuration 1 interface 0 "NEC OHCI root hub" rev 1.00/1.00 
addr 1
usb4 at ohci3: USB revision 1.0
uhub4 at usb4 configuration 1 interface 0 "NEC OHCI root hub" rev 1.00/1.00 
addr 1
ppb1 at pci1 dev 3 function 0 "Apple U3" rev 0x00
pci4 at ppb1 bus 2
kauaiata0 at pci4 dev 13 function 0 "Apple K2 ATA" rev 0x00
wdc0 at kauaiata0 irq 39: DMA
atapiscsi0 at wdc0 channel 0 drive 0
scsibus1 at atapiscsi0: 2 targets
cd0 at scsibus1 targ 0 lun 0: <PIONEER, DVD-RW DVR-117D, B705> removable
cd0(wdc0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 4
"Apple K2 Firewire" rev 0x00 at pci4 dev 14 function 0 not configured
ppb2 at pci1 dev 4 function 0 "Apple U3" rev 0x00
pci5 at ppb2 bus 3
gem0 at pci5 dev 15 function 0 "Apple K2 GMAC" rev 0x00: irq 41, address 
00:0d:93:55:51:d2
brgphy0 at gem0 phy 1: BCM54K2 10/100/1000baseT PHY, rev. 0
ppb3 at pci1 dev 5 function 0 "Apple U3" rev 0x00
pci6 at ppb3 bus 4
pciide0 at pci6 dev 12 function 0 "ServerWorks K2 SATA" rev 0x00: DMA
pciide0: using irq 0 for native-PCI interrupt
pciide0: port 0: 1.5Gb/s
wd0 at pciide0 channel 0 drive 0: <ST380013AS>
wd0: 16-sector PIO, LBA48, 76319MB, 156301488 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 6
pciide0: port 1: PHY offline
pciide0: port 2: PHY offline
pciide0: port 3: PHY offline
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
bootpath: /ht/pci@5/k2-sata-root/k2-sata@0/disk@0:/bsd
root on wd0a (6102496318219727.a) swap on wd0b dump on wd0b
Automatic boot in progress: starting file system checks.
/dev/wd0a (6102496318219727.a): file system is clean; not checking
/dev/wd0l (6102496318219727.l): file system is clean; not checking
/dev/wd0d (6102496318219727.d): file system is clean; not checking
/dev/wd0f (6102496318219727.f): file system is clean; not checking
/dev/wd0g (6102496318219727.g): file system is clean; not checking
/dev/wd0h (6102496318219727.h): file system is clean; not checking
/dev/wd0j (6102496318219727.j): file system is clean; not checking
/dev/wd0k (6102496318219727.k): file system is clean; not checking
/dev/wd0e (6102496318219727.e): file system is clean; not checking
pf enabled
ddb.console: 0 -> 1
ddb.log: 1 -> 0
ddb.max_line: 24 -> 0
ddb.max_width: 80 -> 0
kern.allowdt: 0 -> 1
kern.allowkmem: 0 -> 1
kern.nosuidcoredump: 1 -> 3
kern.pool_debug: 1 -> 1
kern.splassert: 1 -> 2
sysctl: kern.witness.watch: specification is incomplete
net.inet.etherip.allow: 0 -> 1
net.inet.ip.forwarding: 0 -> 1
net.inet.ipcomp.enable: 0 -> 1
net.inet.ipip.allow: 0 -> 1
net.inet6.ip6.forwarding: 0 -> 1
vm.malloc_conf:  -> CFGJU
starting network
reordering: ld.so libc libcrypto sshd[-- MARK -- Tue Jul 18 22:20:00 2023]

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