port-macppc/54331: macppc MP kernels fail to boot successfully in -current (8.99.49)

[david%gutteridge.ca@localhost]

>Number:         54331
>Category:       port-macppc
>Synopsis:       macppc MP kernels fail to boot successfully in -current (8.99.49)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-macppc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jun 29 23:15:00 +0000 2019
>Originator:     David H. Gutteridge
>Release:        8.99.49/macppc
>Organization:
>Environment:
(See following dmesg details.)
>Description:
I'm unable to boot a -current MP macppc kernel. It initially hits
"autoconfiguration error: 2:CPU 1 didn't start 2", which generates a
brief backtrace at the db prompt. Choosing "continue" after this gets
the boot much farther, but then it starts outputting garbled text at
random points on the console, and reboots.

Note this is not an issue with 8.1. Its GENERIC.MP kernel works quite
well on the same hardware. This is also not an issue with the UP
GENERIC kernel on the same hardware, 8.99.49 works fine (so far as I've
tested it). So there's a regression somewhere in the MP code.

GENERIC.MP kernel with DIAGNOSTIC and DEBUG enabled:

[   1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
[   1.0000000]     2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
[   1.0000000]     2018, 2019 The NetBSD Foundation, Inc.  All rights reserved.
[   1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[   1.0000000]     The Regents of the University of California.  All rights reserved.

[   1.0000000] NetBSD 8.99.49 (DEBUG) #2: Fri Jun 28 23:54:10 EDT 2019
[   1.0000000] 	disciple%arcusxvi.nonus-porta.net@localhost:/home/disciple/netbsd-current/src/sys/arch/macppc/compile/obj/DEBUG
[   1.0000000] total memory = 512 MB
[   1.0000000] avail memory = 480 MB
[   1.0000000] timecounter: Timecounters tick every 10.000 msec
[   1.0000000] Kernelized RAIDframe activated
[   1.0000000] found openpic PIC at 80040000
[   1.0000000] OpenPIC Version 1.2: Supports 4 CPUs and 64 interrupt sources.
[   1.0000000] bootpath: /pci@f4000000/ata-6@d/disk@0:0/netbsd-current-mp-debug
[   1.0000000] mainbus0 (root)
[   1.0000000] cpu0 at mainbus0: 7455 (Revision 2.1), 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: 866.67 MHz, 256KB L2 cache no parity, 1MB no-parity L3 cache (DDR SRAM) at 4:1 ratio
[   1.0000000] cpu1 at mainbus0: 7455 (Revision 2.1), 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: 866.67 MHz, 256KB L2 cache no parity, 1MB no-parity L3 cache (DDR SRAM) at 4:1 ratio
[   1.0000000] autoconfiguration error: 2:CPU 1 didn't start 2
Stopped in pid 0.1 (system) at netbsd:cpu_spinup+0x2b8          lwz     r29,  0x1
14(r1)
db{0}> bt
0x00dd8d30: at config_attach_loc+0x1d4
0x00dd8d60: at config_found_sm_loc+0x5c
0x00dd8d90: at mainbus_attach+0x74
0x00dd8e60: at config_attach_loc+0x1d4
0x00dd8e90: at cpu_configure+0x20
0x00dd8ea0: at main+0x314
0x00dd8f10: at 0x1000b4
db{0}> continue
[   1.0000000] memory0 at mainbus0: len=512
[   1.0000000] spdmem0 at memory0
[   1.0000000] spdmem0: DDR SDRAM, no parity or ECC, 256MB, 267MHz (PC-2100)
[   1.0000000] spdmem0: 13 rows, 10 cols, 1 ranks, 4 banks/chip, 7.5ns cycle time
[   1.0000000] spdmem0: tAA-tRCD-tRP-tRAS: 1-3-3-6
[   1.0000000] spdmem0: voltage SSTL 2.5V, refresh time 7.8us (self-refreshing)
[   1.0000000] spdmem1 at memory0
[   1.0000000] spdmem1: DDR SDRAM, no parity or ECC, 256MB, 267MHz (PC-2100)
[   1.0000000] spdmem1: 13 rows, 10 cols, 1 ranks, 4 banks/chip, 7.5ns cycle time
[   1.0000000] spdmem1: tAA-tRCD-tRP-tRAS: 1-3-3-6
[   1.0000000] spdmem1: voltage SSTL 2.5V, refresh time 7.8us (self-refreshing)
[   1.0000000] uni_n0 at mainbus0 address 0xf8000000
[   1.0000000] ki2c0 at uni_n0 address 0xf8001000
[   1.0000000] iic0 at ki2c0: I2C bus
[   1.0000000] dbcool0 at iic0 addr 0x2c
[   1.0000000] dbcool0: ADM1030 dBCool(tm) Controller (rev 0x0083)
[   1.0000000] i2c-hwclock at iic0 addr 0x65 not configured
[   1.0000000] admtemp0 at iic0 addr 0x49: LM84 temperature sensor: id. 0x4b, rev. 0x00
[   1.0000000] uninorth0 at mainbus0
[   1.0000000] pci0 at uninorth0 bus 0
[   1.0000000] pci0: i/o space, memory space enabled
[   1.0000000] pchb0 at pci0 dev 11 function 0
[   1.0000000] pchb0: Apple Computer UniNorth AGP Bridge (rev. 0x00)
[   1.0000000] genfb0 at pci0 dev 16 function 0: NVIDIA GeForce4 MX 420 (rev. 0xa3)
[   1.0000000] genfb0: framebuffer at 0x98004000, size 1360x768, depth 8, stride 1536
[   1.0000000] wsdisplay0 at genfb0 kbdmux 1: console (default, vt100 emulation)
[   1.0000000] wsmux1: connecting to wsdisplay0
[   1.0000000] drm at genfb0 not configured
[   1.0000000] uninorth1 at mainbus0
[   1.0000000] pci1 at uninorth1 bus 0
[   1.0000000] pci1: i/o space, memory space enabled
[   1.0000000] pchb1 at pci1 dev 11 function 0
[   1.0000000] pchb1: Apple Computer UniNorth Host-PCI Bridge (rev. 0x00)
[   1.0000000] obio0 at pci1 dev 23 function 0: addr 0x80000000
[   1.0000000] obio0: enabling KeyLargo internal modem
[   1.0000000] zsc0 at obio0 irq 22,23
[   1.0000000] zstty0 at zsc0 channel 0
[   1.0000000] zstty1 at zsc0 channel 1
[   1.0000000] snapper0 at obio0 offset 0x10000: irq 30,1,2
[   1.0000000] pmu0 at obio0 offset 0x16000 irq 47:  rev. 12
[   1.0000000] pmu0: initializing IIC bus
[   1.0000000] iic1 at pmu0: I2C bus
[   1.0000000] i2c-hwclock at iic1 addr 0x6a not configured
[   1.0000000] i2c-hwclock at iic1 addr 0x64 not configured
[   1.0000000] pmu0: initializing RTC
[   1.0000000] pmu0: power-mgt not configured
[   1.0000000] ki2c1 at obio0
[   1.0000000] iic2 at ki2c1: I2C bus
[   1.0000000] deq0 at iic2 addr 0x35 Audio Codec (tas3004)
[   1.0000000] wdc0 at obio0 offset 0x1f000 irq 19, level triggered: DMA transfer
[   1.0000000] atabus0 at wdc0 channel 0
[   1.0000000] wdc1 at obio0 offset 0x20000 irq 20, level triggered: DMA transfer
[   1.0000000] atabus1 at wdc1 channel 0
[   1.0000000] snapper0: codec: TAS3004
[   1.0000000] audio0 at snapper0: playback, capture, full duplex
[   1.0000000] audio0: slinear_be:16 -> slinear_be:16 2ch 48000Hz, blk 21ms for playback
[   1.0000000] audio0: slinear_be:16 <- slinear_be:16 2ch 48000Hz, blk 21ms for recording
[   1.0000000] spkr0 at audio0: PC Speaker (synthesized)
[   1.0000000] wsbell at spkr0 not configured
[   1.0000000] ohci0 at pci1 dev 24 function 0: Apple Computer KeyLargo USB Controller (rev. 0x00)
[   1.0000000] csr: 02000006
[   1.0000000] genppc_pci_intr_map: pin: 1, line: 27
[   1.0000000] ohci0: interrupting at irq 27
[   1.0000000] ohci0: OHCI version 1.0
[   1.0000000] usb0 at ohci0: USB revision 1.0
[   1.0000000] ohci1 at pci1 dev 25 function 0: Apple Computer KeyLargo USB Controller (rev. 0x00)
[   1.0000000] csr: 02000006
[   1.0000000] genppc_pci_intr_map: pin: 1, line: 28
[   1.0000000] ohci1: interrupting at irq 28
[   1.0000000] ohci1: OHCI version 1.0
[   1.0000000] usb1 at ohci1: USB revision 1.0
[   1.0000000] uninorth2 at mainbus0
[   1.0000000] pci2 at uninorth2 bus 0
[   1.0000000] pci2: i/o space, memory space enabled
[   1.0000000] pchb2 at pci2 dev 11 function 0
[   1.0000000] pchb2: Apple Computer UniNorth Host-PCI Bridge (rev. 0x00)
[   1.0000000] wdc2 at pci2 dev 13 function 0genppc_pci_intr_map: pin: 1, line: 39
[   1.0000000] : interrupting at irq 39
[   1.0000000] atabus2 at wdc2 channel 0
[   1.0000000] fwohci0 at pci2 dev 14 function 0: Apple Computer UniNorth Firewire (rev. 0x01)
[   1.0000000] genppc_pci_intr_map: pin: 1, line: 40
[   1.0000000] fwohci0: interrupting at irq 40
[   1.0000000] fwohci0: OHCI version 1.10 (ROM=0)
[   1.0000000] fwohci0: No. of Isochronous channels is 8.
[   1.0000000] fwohci0: EUI64 00:03:93:ff:fe:dc:b7:e2
[   1.0000000] fwohci0: Phy 1394a available S400, 3 ports.
[   1.0000000] fwohci0: Link S400, max_rec 2048 bytes.
[   1.0000000] ieee1394if0 at fwohci0: IEEE1394 bus
[   1.0000000] fwip0 at ieee1394if0: IP over IEEE1394
[   1.0000000] fwohci0: Initiate bus reset
[   1.0000000] fwohci0: Clear PME# now
[   1.0000000] gem0 at pci2 dev 15 function 0: Apple Computer GMAC Ethernet (rev. 0x00)
[   1.0000000] genppc_pci_intr_map: pin: 1, line: 41
[   1.0000000] gem0: interrupting at irq 41
[   1.0000000] brgphy0 at gem0 phy 0: BCM5421 1000BASE-T media interface, rev. 1
[   1.0000000] brgphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
[   1.0000000] gem0: Ethernet address 00:03:93:dc:b7:e2, 10KB RX fifo, 4KB TX fifo
[   1.0000000] vmmask 677c0000 schedmask 7ffc0000 highmask 7ffc0000
[   1.0000000] timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
[   1.0000030] timecounter: Timecounter "mftb" frequency 33304156 Hz quality 100
[   1.0000203] fwohci0: BUS reset
[   1.0000203] fwohci0: node_id=0xc800ffc0, gen=2, CYCLEMASTER mode
[   1.0000203] ieee1394if0: 1 nodes, maxhop <= 0 cable IRM irm(0) (me)
[   1.0000203] ieee1394if0: bus manager 0
[   1.0000203] cpu1 started
[   1.0800202] panic: kernel diagnostic assertion "virq != 0" failed: file "/home/disciple/netbsd-current/src/sys/arch/powerpc/pic/intr.c", line 561 
[   1.1099928] cpu1: Begin traceback...
[   1.1199932] 0x00dd9d40: at vpanic+0x144
[   1.1299929] uhub0 at usb0: NetBSD (00000x)0 0OdHdC9Id 7r0o:o t hub (0000), class 9/0, rev 1.00/1.00, adadtr  k1e
[   1.1299929] rn_assert+0x60
[   1.1299929] uhub0: 2 ports with 2 removable, self powered
[   1.1299929] uhub1 at usb1: NetBSD (0000) OHCI root hub0 x(0000d0d09)d,b 0c:l ass 9/0, rev 1.00/1.00, addr 1
[   1.1299929] at pic_handle_intr+0x200
[   1.1299929] uhub1: 2 ports with 2 removable, self powered
[   1.1299929] uhub0: autoconfiguration error: port 1 reset 0fxa0i0ldedd9
[   1.1299929] e00: at trapstart+0x6b0
[   1.1299929] uhub1: autoconfiguration error: port 1 reset 0fxa0i0ldedd
[   1.1299929] 9ed0: at kprintf+0x7f8
[   1.3700513] at0axp0i0bduds90f 0a0t :a tabus1: 2 targets
[   1.3700513] at trapstart+0x800
[   1.3700513] [c d 0  1a.t3 7a0t0a51p3i]b u0sx00 0ddrdi9vfed0 0: : <PHILIPS CDD5101, H9246047JNVGA,a tA 4c.pu2>_ chadrtcomh +r0xe2mo1vca
[   1.3700513] ble
[   1.3700513] 0x00dd9ff0: at cpucd0: drive supports PIO mode _4spinup_tr, DMA mode 2
[[      11..55110000334466]]  mcpoonlifn[0e+] 0=x 03cx
[   1.5100346] 11823, cyc = 4 (120 ns), act = 3 (75 ns), inact = 1
[   1.5100346] cpu1: End traceback...
[   1.5100346] cd0(wdc1:0:0): using PIO mode 4, DMA mode 2 (using DMA)
[   1.5100346] wd0 at atabus2 drive 0
[   1.5100346] Failed to pause: cpu0
[   1.5100346] wd0: <WDC WD800JB-00JJC0>
[   1.5100346] wd0: drive supports 16-sector PIO transfers, LBA addressing
[   1.5100346] wd0: 76319 MB, 155061 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 sectors
[   1.8000446] wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
[   1.8000446] wd1 at atabus2 drive 1
[   1.8000446] wd1: <IBM-IC35L120AVVA07-0>
[   1.8000446] wd1: drive supports 16-sector PIO transfers, LBA addressing
[   1.8000446] wd1: 115 GB, 239340 cyl, 16 head, 63 sec, 512 bytes/sect x 241254720 sectors
[   1.9499934] wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
[   1.9499934] wd0(wdc2:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100) (using DMA)
[   1.9499934] wd1(wdc2:0:1): using PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100) (using DMA)
[   1.9699929] dumpsys: TBD
[   1.9999936] rebooting

GENERIC UP kernel output:

[   1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
[   1.0000000]     2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
[   1.0000000]     2018, 2019 The NetBSD Foundation, Inc.  All rights reserved.
[   1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[   1.0000000]     The Regents of the University of California.  All rights reserved.

[   1.0000000] NetBSD 8.99.49 (GENERIC) #1: Sat Jun 29 15:55:20 EDT 2019
[   1.0000000] 	disciple%arcusxvi.nonus-porta.net@localhost:/home/disciple/netbsd-current/src/sys/arch/macppc/compile/obj/GENERIC
[   1.0000000] total memory = 512 MB
[   1.0000000] avail memory = 482 MB
[   1.0000000] timecounter: Timecounters tick every 10.000 msec
[   1.0000000] Kernelized RAIDframe activated
[   1.0000000] found openpic PIC at 80040000
[   1.0000000] OpenPIC Version 1.2: Supports 4 CPUs and 64 interrupt sources.
[   1.0000000] bootpath: /pci@f4000000/ata-6@d/disk@0:0/netbsd-current-up
[   1.0000000] mainbus0 (root)
[   1.0000000] cpu0 at mainbus0: 7455 (Revision 2.1), 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: 866.67 MHz, 256KB L2 cache no parity, 1MB no-parity L3 cache (DDR SRAM) at 4:1 ratio
[   1.0000000] cpu1 at mainbus0: ID 1
[   1.0000000] cpu1: processor off-line; multiprocessor support not present in kernel
[   1.0000000] memory0 at mainbus0: len=512
[   1.0000000] spdmem0 at memory0
[   1.0000000] spdmem0: DDR SDRAM, no parity or ECC, 256MB, 267MHz (PC-2100)
[   1.0000000] spdmem0: 13 rows, 10 cols, 1 ranks, 4 banks/chip, 7.5ns cycle time
[   1.0000000] spdmem0: tAA-tRCD-tRP-tRAS: 1-3-3-6
[   1.0000000] spdmem0: voltage SSTL 2.5V, refresh time 7.8us (self-refreshing)
[   1.0000000] spdmem1 at memory0
[   1.0000000] spdmem1: DDR SDRAM, no parity or ECC, 256MB, 267MHz (PC-2100)
[   1.0000000] spdmem1: 13 rows, 10 cols, 1 ranks, 4 banks/chip, 7.5ns cycle time
[   1.0000000] spdmem1: tAA-tRCD-tRP-tRAS: 1-3-3-6
[   1.0000000] spdmem1: voltage SSTL 2.5V, refresh time 7.8us (self-refreshing)
[   1.0000000] uni_n0 at mainbus0 address 0xf8000000
[   1.0000000] ki2c0 at uni_n0 address 0xf8001000
[   1.0000000] iic0 at ki2c0: I2C bus
[   1.0000000] dbcool0 at iic0 addr 0x2c
[   1.0000000] dbcool0: ADM1030 dBCool(tm) Controller (rev 0x0083)
[   1.0000000] i2c-hwclock at iic0 addr 0x65 not configured
[   1.0000000] admtemp0 at iic0 addr 0x49: LM84 temperature sensor: id. 0x4b, rev. 0x00
[   1.0000000] uninorth0 at mainbus0
[   1.0000000] pci0 at uninorth0 bus 0
[   1.0000000] pci0: i/o space, memory space enabled
[   1.0000000] pchb0 at pci0 dev 11 function 0
[   1.0000000] pchb0: Apple Computer UniNorth AGP Bridge (rev. 0x00)
[   1.0000000] genfb0 at pci0 dev 16 function 0: NVIDIA GeForce4 MX 420 (rev. 0xa3)
[   1.0000000] genfb0: framebuffer at 0x98004000, size 1360x768, depth 8, stride 1536
[   1.0000000] wsdisplay0 at genfb0 kbdmux 1: console (default, vt100 emulation)
[   1.0000000] wsmux1: connecting to wsdisplay0
[   1.0000000] drm at genfb0 not configured
[   1.0000000] uninorth1 at mainbus0
[   1.0000000] pci1 at uninorth1 bus 0
[   1.0000000] pci1: i/o space, memory space enabled
[   1.0000000] pchb1 at pci1 dev 11 function 0
[   1.0000000] pchb1: Apple Computer UniNorth Host-PCI Bridge (rev. 0x00)
[   1.0000000] obio0 at pci1 dev 23 function 0: addr 0x80000000
[   1.0000000] obio0: enabling KeyLargo internal modem
[   1.0000000] zsc0 at obio0 irq 22,23
[   1.0000000] zstty0 at zsc0 channel 0
[   1.0000000] zstty1 at zsc0 channel 1
[   1.0000000] snapper0 at obio0 offset 0x10000: irq 30,1,2
[   1.0000000] pmu0 at obio0 offset 0x16000 irq 47:  rev. 12
[   1.0000000] pmu0: initializing IIC bus
[   1.0000000] iic1 at pmu0: I2C bus
[   1.0000000] i2c-hwclock at iic1 addr 0x6a not configured
[   1.0000000] i2c-hwclock at iic1 addr 0x64 not configured
[   1.0000000] pmu0: initializing RTC
[   1.0000000] pmu0: power-mgt not configured
[   1.0000000] ki2c1 at obio0
[   1.0000000] iic2 at ki2c1: I2C bus
[   1.0000000] deq0 at iic2 addr 0x35 Audio Codec (tas3004)
[   1.0000000] wdc0 at obio0 offset 0x1f000 irq 19, level triggered: DMA transfer
[   1.0000000] atabus0 at wdc0 channel 0
[   1.0000000] wdc1 at obio0 offset 0x20000 irq 20, level triggered: DMA transfer
[   1.0000000] atabus1 at wdc1 channel 0
[   1.0000000] snapper0: codec: TAS3004
[   1.0000000] audio0 at snapper0: playback, capture, full duplex
[   1.0000000] audio0: slinear_be:16 -> slinear_be:16 2ch 48000Hz, blk 21ms for playback
[   1.0000000] audio0: slinear_be:16 <- slinear_be:16 2ch 48000Hz, blk 21ms for recording
[   1.0000000] spkr0 at audio0: PC Speaker (synthesized)
[   1.0000000] wsbell at spkr0 not configured
[   1.0000000] ohci0 at pci1 dev 24 function 0: Apple Computer KeyLargo USB Controller (rev. 0x00)
[   1.0000000] ohci0: interrupting at irq 27
[   1.0000000] ohci0: OHCI version 1.0
[   1.0000000] usb0 at ohci0: USB revision 1.0
[   1.0000000] ohci1 at pci1 dev 25 function 0: Apple Computer KeyLargo USB Controller (rev. 0x00)
[   1.0000000] ohci1: interrupting at irq 28
[   1.0000000] ohci1: OHCI version 1.0
[   1.0000000] usb1 at ohci1: USB revision 1.0
[   1.0000000] uninorth2 at mainbus0
[   1.0000000] pci2 at uninorth2 bus 0
[   1.0000000] pci2: i/o space, memory space enabled
[   1.0000000] pchb2 at pci2 dev 11 function 0
[   1.0000000] pchb2: Apple Computer UniNorth Host-PCI Bridge (rev. 0x00)
[   1.0000000] wdc2 at pci2 dev 13 function 0: interrupting at irq 39
[   1.0000000] atabus2 at wdc2 channel 0
[   1.0000000] fwohci0 at pci2 dev 14 function 0: Apple Computer UniNorth Firewire (rev. 0x01)
[   1.0000000] fwohci0: interrupting at irq 40
[   1.0000000] fwohci0: OHCI version 1.10 (ROM=0)
[   1.0000000] fwohci0: No. of Isochronous channels is 8.
[   1.0000000] fwohci0: EUI64 00:03:93:ff:fe:dc:b7:e2
[   1.0000000] fwohci0: Phy 1394a available S400, 3 ports.
[   1.0000000] fwohci0: Link S400, max_rec 2048 bytes.
[   1.0000000] ieee1394if0 at fwohci0: IEEE1394 bus
[   1.0000000] fwip0 at ieee1394if0: IP over IEEE1394
[   1.0000000] fwohci0: Initiate bus reset
[   1.0000000] fwohci0: Clear PME# now
[   1.0000000] gem0 at pci2 dev 15 function 0: Apple Computer GMAC Ethernet (rev. 0x00)
[   1.0000000] gem0: interrupting at irq 41
[   1.0000000] brgphy0 at gem0 phy 0: BCM5421 1000BASE-T media interface, rev. 1
[   1.0000000] brgphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
[   1.0000000] gem0: Ethernet address 00:03:93:dc:b7:e2, 10KB RX fifo, 4KB TX fifo
[   1.0000000] vmmask 677c0000 schedmask 7ffc0000 highmask 7ffc0000
[   1.0000000] timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
[   1.0000030] timecounter: Timecounter "mftb" frequency 33304213 Hz quality 100
[   1.0000188] fwohci0: BUS reset
[   1.0000188] fwohci0: node_id=0xc800ffc0, gen=2, CYCLEMASTER mode
[   1.0000188] ieee1394if0: 1 nodes, maxhop <= 0 cable IRM irm(0) (me)
[   1.0000188] ieee1394if0: bus manager 0
[   1.1099931] uhub0 at usb0: NetBSD (0000) OHCI root hub (0000), class 9/0, rev 1.00/1.00, addr 1
[   1.1099931] uhub0: 2 ports with 2 removable, self powered
[   1.1099931] uhub1 at usb1: NetBSD (0000) OHCI root hub (0000), class 9/0, rev 1.00/1.00, addr 1
[   1.1099931] uhub1: 2 ports with 2 removable, self powered
[   1.1099931] IPsec: Initialized Security Association Processing.
[   1.1799927] atapibus0 at atabus1: 2 targets
[   1.2100003] cd0 at atapibus0 drive 0: <PHILIPS CDD5101, H9246047JNVGA, A4.2> cdrom removable
[   1.2100003] cd0: drive supports PIO mode 4, DMA mode 2
[   1.2100003] cd0(wdc1:0:0): using PIO mode 4, DMA mode 2 (using DMA)
[   1.2100003] wd0 at atabus2 drive 0
[   1.2100003] wd0: <WDC WD800JB-00JJC0>
[   1.2100003] wd0: drive supports 16-sector PIO transfers, LBA addressing
[   1.2100003] wd0: 76319 MB, 155061 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 sectors
[   1.3099933] wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
[   1.3099933] wd1 at atabus2 drive 1
[   1.3099933] wd1: <IBM-IC35L120AVVA07-0>
[   1.3099933] wd1: drive supports 16-sector PIO transfers, LBA addressing
[   1.3099933] wd1: 115 GB, 239340 cyl, 16 head, 63 sec, 512 bytes/sect x 241254720 sectors
[   1.3800037] wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
[   1.3800037] wd0(wdc2:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100) (using DMA)
[   1.3800037] wd1(wdc2:0:1): using PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100) (using DMA)
[   3.4399993] uhidev0 at uhub1 port 1 configuration 1 interface 0
[   3.4399993] uhidev0: Logitech (0x46d) USB-PS/2 Optical Mouse (0xc00e), rev 2.00/11.10, addr 2, iclass 3/1
[   3.4399993] uhub2 at uhub0 port 1: Apple, Inc. (0x5ac) Keyboard Hub (0x1006), class 9/0, rev 2.00/96.15, addr 2
[   3.5100094] ums0 at uhidev0: 3 buttons and Z dir
[   3.5100094] wsmouse0 at ums0 mux 0
[   3.5100094] uhub2: 3 ports with 2 removable, bus powered
[   4.8800033] uhidev1 at uhub2 port 2 configuration 1 interface 0
[   4.8800033] uhidev1: Apple, Inc (0x5ac) Apple Keyboard (0x220), rev 2.00/0.69, addr 3, iclass 3/1
[   4.8800033] ukbd0 at uhidev1
[   5.2900034] wskbd0 at ukbd0: console keyboard, using wsdisplay0
[   5.2900034] uhidev2 at uhub2 port 2 configuration 1 interface 1
[   5.2900034] uhidev2: Apple, Inc (0x5ac) Apple Keyboard (0x220), rev 2.00/0.69, addr 3, iclass 3/0
[   5.3500123] uhid0 at uhidev2: input=1, output=0, feature=0
[   5.3500123] swwdog0: software watchdog initialized
[   5.4400041] boot device: wd0
[   5.4400041] root on wd0a dumps on wd0b
[   5.4800100] Supported file systems: mfs lfs ffs ext2fs nfs umap procfs overlay null kernfs fdesc union tmpfs smbfs puffs ptyfs ntfs msdos efs cd9660 coda
[   5.4800100] no file system for wd0 (dev 0xa00)
[   5.4800100] cannot mount root, error = 79
[   5.4800100] root device (default wd0a): wd0b
[   5.5700058] dump device (default wd0b): wd0f
[   6.5000709] file system (default generic): 
[   7.4400821]  dumps on wd0f
[   7.7601033] root file system type: ffs
[   7.7601033] kern.module.path=/stand/macppc/8.99.49/modules
[   7.7601033] WARNING: clock gained 19 days
[   7.8201039] init path (default /sbin/init): 
[   7.8601049] init: trying /sbin/init
[  20.7801459] wsdisplay0: screen 1 added (default, vt100 emulation)
[  20.7801459] wsdisplay0: screen 2 added (default, vt100 emulation)
[  20.7801459] wsdisplay0: screen 3 added (default, vt100 emulation)
[  20.7901492] wsdisplay0: screen 4 added (default, vt100 emulation)

>How-To-Repeat:
Boot an MP kernel in -current on a G4 Mac with two CPUs.
>Fix: