Kernel Panic - Not Syncing Error -- solution?

[Simon]

Hi there

Did anyone manage to solve the 'Kernel Panic - Not Syncing Error' detailed by lkraemer's post on on: May 26, 2009?

IO APIC Resources cound not be allocated
Kernel Panic - Not Syncing:  Attempted to kill init!

I'm trying to run Tiny Core Linux 2.1 on a Vaio PCG-C1F notebook (128MB RAM), and I have received the same error message. I've also tried a variety of codes to the kernel -- NOAPIC etc, but no luck.

@B

Simon

[danielibarnes]

This may help:
http://lwn.net/1998/0205/io-apic.html

If you are unsure how to interpret that page, post the output of
cat /proc/interrupts
here.

I think the reference is to a 2.4 kernel; I'm not sure. It's a shot in the dark, but different than all the noapic, noacpi lapic options you've probably already tried.

[alu]

some more messages here on an aleutia 128 mb ram:

CPU: vendor_id 'SiS SiS SiS' unknown, using generic init
CPU: your system may be unstable
IO APIC ressources could not be allocated
Using IPI NO-Shortcut mode
Freeing unused kernel memory: 344k freed
Kernel Panic - not syncing: Attempt to kill init !

then it is impossible to get to prompt; the system freezes and only let you reboot; impossible to get more infos

the computer works with puppy 3.x and debian lenny (only text mode).

[gerald_clark]

Are those other systems 2.4 or 2.6 kernels?
I have not been able to get a 2.6 kernel to run on SiS 586 class processors ( ebox 2300 ).

[alu]

2.6 kernels for me (2.6.27 for debian and 2.6.19 for puppy, if i am not mistaken); i have also succesfully tried debian with xfce and fluxbox on that aleutia, works but you have not to use some heavy graphical apps, and be patient sometimes

[danielibarnes]

You might also try posting the output of
cat /proc/cpuinfo
using a linux that works so we can have some context. That and the /proc/interrupts output might help diagnose the issue.

I see this issue mentioned many times in google searches, but no one ever offers a solution ...

[Simon]

Thanks for all of your help and suggestions, but I still haven’t any luck in booting tinycore 2.2.
After reading other posts I decided to download  tinycore 1.4.3. This boots to the desktop, but dmesg reveals the ACPI error below (extracted from the full dmesg listing, also below).

Code: [Select]

ACPI Error (psargs-0358): [\_TZ_.ATF0] Namespace lookup failure, AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.QREC] (Node c741f400), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.SCID] (Node c741f414), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_GPE._E09] (Node c7419518), AE_NOT_FOUND
ACPI Exception (evgpe-0573): AE_NOT_FOUND, while evaluating GPE method [_E09] [20080321]
While the desktop looks good and quick checks reveal that everything appears to work, I cannot access the wbar because it has ‘fallen’ off the bottom of the screen…. see my posting:

‘Is it possible to correct Xvesa screen resolutions for XGA 1024x480 screen?

I’d be grateful for any help is resolving the ACPI error.

thanks

Simon


dmesg:

Code: [Select]

Linux version 2.6.26-tinycore (root@box) (gcc version 4.2.2) #1 SMP Wed Jul 23 11:20:28 UTC 2008
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
 BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000e7800 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 0000000007ff0000 (usable)
 BIOS-e820: 0000000007ff0000 - 0000000007fffc00 (ACPI data)
 BIOS-e820: 0000000007fffc00 - 0000000008000000 (ACPI NVS)
 BIOS-e820: 00000000fffe7800 - 0000000100000000 (reserved)
0MB HIGHMEM available.
127MB LOWMEM available.
Entering add_active_range(0, 0, 32752) 0 entries of 256 used
Zone PFN ranges:
  DMA             0 ->     4096
  Normal       4096 ->    32752
  HighMem     32752 ->    32752
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
    0:        0 ->    32752
On node 0 totalpages: 32752
  DMA zone: 32 pages used for memmap
  DMA zone: 0 pages reserved
  DMA zone: 4064 pages, LIFO batch:0
  Normal zone: 224 pages used for memmap
  Normal zone: 28432 pages, LIFO batch:7
  HighMem zone: 0 pages used for memmap
  Movable zone: 0 pages used for memmap
DMI not present or invalid.
ACPI: RSDP 000F6C50, 0014 (r0 PTLTD )
ACPI: RSDT 07FFCC86, 0028 (r1 PTLTD    RSDT          0  LTP        0)
ACPI: FACP 07FFFB8C, 0074 (r1 SONY                   0 PTL     F4240)
ACPI: DSDT 07FFCCAE, 2EDE (r1   SONY                 0 MSFT  1000007)
ACPI: FACS 07FFFFC0, 0040
ACPI: PM-Timer IO Port: 0x8008
Allocating PCI resources starting at 10000000 (gap: 08000000:f7fe7800)
PM: Registered nosave memory: 000000000009f000 - 00000000000a0000
PM: Registered nosave memory: 00000000000a0000 - 00000000000e8000
PM: Registered nosave memory: 00000000000e8000 - 0000000000100000
SMP: Allowing 0 CPUs, 0 hotplug CPUs
PERCPU: Allocating 36776 bytes of per cpu data
NR_CPUS: 8, nr_cpu_ids: 1
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 32496
Kernel command line: text vga=788
No local APIC present or hardware disabled
mapped APIC to ffffb000 (0110b000)
Initializing CPU#0
PID hash table entries: 512 (order: 9, 2048 bytes)
Detected 263.933 MHz processor.
Console: colour dummy device 80x25
console [tty0] enabled
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Memory: 117104k/131008k available (2430k kernel code, 13372k reserved, 1058k data, 284k init, 0k highmem)
virtual kernel memory layout:
    fixmap  : 0xfff4c000 - 0xfffff000   ( 716 kB)
    pkmap   : 0xff800000 - 0xffc00000   (4096 kB)
    vmalloc : 0xc8800000 - 0xff7fe000   ( 879 MB)
    lowmem  : 0xc0000000 - 0xc7ff0000   ( 127 MB)
      .init : 0xc0470000 - 0xc04b7000   ( 284 kB)
      .data : 0xc035f961 - 0xc04681b8   (1058 kB)
      .text : 0xc0100000 - 0xc035f961   (2430 kB)
Checking if this processor honours the WP bit even in supervisor mode...Ok.
CPA: page pool initialized 1 of 1 pages preallocated
Calibrating delay using timer specific routine.. 528.73 BogoMIPS (lpj=881182)
Mount-cache hash table entries: 512
Intel Pentium with F0 0F bug - workaround enabled.

Checking 'hlt' instruction... OK.
SMP alternatives: switching to UP code
Freeing SMP alternatives: 13k freed
ACPI: Core revision 20080321
weird, boot CPU (#0) not listedby the BIOS.
SMP motherboard not detected.
Local APIC not detected. Using dummy APIC emulation.
SMP disabled
Brought up 1 CPUs
Total of 1 processors activated (528.73 BogoMIPS).
net_namespace: 632 bytes
NET: Registered protocol family 16
No dock devices found.
ACPI: bus type pci registered
PCI: PCI BIOS revision 2.10 entry at 0xfda04, last bus=0
PCI: Using configuration type 1 for base access
Setting up standard PCI resources
ACPI: EC: Look up EC in DSDT
ACPI: Interpreter enabled
ACPI: (supports S0 S1 S5)
ACPI: Using PIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (0000:00)
* Found PM-Timer Bug on the chipset. Due to workarounds for a bug,
* this clock source is slow. Consider trying other clock sources
pci 0000:00:07.3: quirk: region 8000-803f claimed by PIIX4 ACPI
pci 0000:00:07.3: quirk: region 2180-218f claimed by PIIX4 SMB
pci 0000:00:07.3: PIIX4 devres B PIO at 8040-8043
pci 0000:00:07.3: PIIX4 devres E PIO at 0140-0147
pci 0000:00:07.3: PIIX4 devres G PIO at 0800-0807
pci 0000:00:07.3: PIIX4 devres J PIO at 0370-0371
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Link [LNKA] (IRQs *9)
ACPI: PCI Interrupt Link [LNKB] (IRQs 9) *0, disabled.
ACPI: PCI Interrupt Link [LNKC] (IRQs *9)
ACPI: PCI Interrupt Link [LNKD] (IRQs *9)
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI init
ACPI: bus type pnp registered
pnp: PnP ACPI: found 16 devices
ACPI: ACPI bus type pnp unregistered
PnPBIOS: Disabled by ACPI PNP
SCSI subsystem initialized
libata version 3.00 loaded.
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
PCI: Using ACPI for IRQ routing
system 00:01: ioport range 0x4d0-0x4d1 has been reserved
system 00:01: ioport range 0x2180-0x218f has been reserved
system 00:01: ioport range 0x8000-0x804f could not be reserved
system 00:02: iomem range 0x100000-0x7ffffff could not be reserved
system 00:02: iomem range 0x0-0x9ffff could not be reserved
system 00:02: iomem range 0xe0000-0xfffff could not be reserved
system 00:02: iomem range 0xfffe0000-0xffffffff could not be reserved
PCI: Bus 1, cardbus bridge: 0000:00:0a.0
  IO window: 0x00001000-0x000010ff
  IO window: 0x00001400-0x000014ff
  PREFETCH window: 0x10000000-0x13ffffff
  MEM window: 0x14000000-0x17ffffff
ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 9
PCI: setting IRQ 9 as level-triggered
ACPI: PCI Interrupt 0000:00:0a.0[A] -> Link [LNKB] -> GSI 9 (level, low) -> IRQ 9
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 4096 (order: 3, 32768 bytes)
TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
TCP reno registered
NET: Registered protocol family 1
checking if image is initramfs...<7>Switched to high resolution mode on CPU 0
 it is
Freeing initrd memory: 8060k freed
fuse init (API version 7.9)
msgmni has been set to 244
io scheduler noop registered
io scheduler deadline registered (default)
pci 0000:00:00.0: Limiting direct PCI/PCI transfers
pci 0000:00:08.0: Boot video device
vesafb: framebuffer at 0xfd000000, mapped to 0xc8880000, using 1875k, total 2496k
vesafb: mode is 800x600x16, linelength=1600, pages=1
vesafb: protected mode interface info at c000:a5e0
vesafb: pmi: set display start = c00ca616, set palette = c00ca676
vesafb: scrolling: redraw
vesafb: Truecolor: size=0:5:6:5, shift=0:11:5:0
Console: switching to colour frame buffer device 100x37
fb0: VESA VGA frame buffer device
input: Power Button (FF) as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
ACPI: Power Button (FF) [PWRF]
input: Lid Switch as /devices/LNXSYSTM:00/device:00/PNP0C0D:00/input/input1
ACPI: Lid Switch [LID]
input: Sleep Button (CM) as /devices/LNXSYSTM:00/device:00/PNP0C0E:00/input/input2
ACPI: Sleep Button (CM) [SLPB]
ACPI: CPU0 (power states: C1[C1] C2[C2])
ACPI: ACPI0007:00 is registered as cooling_device0
ACPI: Processor [CPU0] (supports 8 throttling states)
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Real Time Clock Driver v1.12ac
Non-volatile memory driver v1.2
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled
serial8250: ttyS2 at I/O 0x3e8 (irq = 4) is a 16550A
serial 00:09: activated
00:09: ttyS0 at I/O 0x3f8 (irq = 11) is a 16550A
Floppy drive(s): fd0 is unknown type 12 (usb?), fd1 is 2.88M AMI BIOS
floppy0: no floppy controllers found
brd: module loaded
loop: module loaded
pcnet32.c:v1.35 21.Apr.2008 tsbogend@alpha.franken.de
e100: Intel(R) PRO/100 Network Driver, 3.5.23-k4-NAPI
e100: Copyright(c) 1999-2006 Intel Corporation
ThunderLAN driver v1.15
TLAN: 0 devices installed, PCI: 0  EISA: 0
PPP generic driver version 2.4.2
PPP Deflate Compression module registered
NET: Registered protocol family 24
tun: Universal TUN/TAP device driver, 1.6
tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
dmfe: Davicom DM9xxx net driver, version 1.36.4 (2002-01-17)
winbond-840.c:v1.01-e (2.4 port) Sep-11-2006  Donald Becker <becker@scyld.com>
  http://www.scyld.com/network/drivers.html
Uniform Multi-Platform E-IDE driver
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
PIIX4: IDE controller (0x8086:0x7111 rev 0x01) at  PCI slot 0000:00:07.1
PIIX4: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xfcd0-0xfcd7
    ide1: BM-DMA at 0xfcd8-0xfcdf
Probing IDE interface ide0...
hda: HMS360404D5CF00, CFA DISK drive
ACPI Error (psargs-0358): [\_TZ_.ATF0] Namespace lookup failure, AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.QREC] (Node c741f400), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.SCID] (Node c741f414), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_GPE._E09] (Node c7419518), AE_NOT_FOUND
ACPI Exception (evgpe-0573): AE_NOT_FOUND, while evaluating GPE method [_E09] [20080321]
hda: host max PIO4 wanted PIO255(auto-tune) selected PIO4
hda: UDMA/33 mode selected
Probing IDE interface ide1...
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
ide_generic: please use "probe_mask=0x3f" module parameter for probing all legacy ISA IDE ports
ide_generic: I/O resource 0x1F0-0x1F7 not free.
ide_generic: I/O resource 0x170-0x177 not free.
hda: max request size: 128KiB
hda: 7999488 sectors (4095 MB) w/128KiB Cache, CHS=7936/16/63
hda: cache flushes supported
 hda: hda1 hda2 hda3 < hda5 >
Driver 'sd' needs updating - please use bus_type methods
USB Universal Host Controller Interface driver v3.0
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 9
ACPI: PCI Interrupt 0000:00:07.2[D] -> Link [LNKD] -> GSI 9 (level, low) -> IRQ 9
uhci_hcd 0000:00:07.2: UHCI Host Controller
uhci_hcd 0000:00:07.2: new USB bus registered, assigned bus number 1
uhci_hcd 0000:00:07.2: irq 9, io base 0x0000fce0
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
PNP: PS/2 Controller [PNP0303:KBC,PNP0f13:MOUE] at 0x60,0x64 irq 1,12
serio: i8042 KBD port at 0x60,0x64 irq 1
serio: i8042 AUX port at 0x60,0x64 irq 12
mice: PS/2 mouse device common for all mice
input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input3
cpuidle: using governor ladder
cpuidle: using governor menu
Marking TSC unstable due to: TSC halts in idle.
usb 1-1: new low speed USB device using uhci_hcd and address 2
usb 1-1: configuration #1 chosen from 1 choice
usbcore: registered new interface driver hiddev
input: HID 062a:0001 as /devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/input/input4
input: USB HID v1.10 Mouse [HID 062a:0001] on usb-0000:00:07.2-1
usbcore: registered new interface driver usbhid
usbhid: v2.6:USB HID core driver
ip_tables: (C) 2000-2006 Netfilter Core Team
TCP cubic registered
NET: Registered protocol family 17
NET: Registered protocol family 15
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
Using IPI No-Shortcut mode
Freeing unused kernel memory: 284k freed
IBM TrackPoint firmware: 0x0b, buttons: 3/3
input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio1/input/input5
ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) Driver
ACPI: Battery Slot [BAT1] (battery absent)
ACPI: Battery Slot [BAT2] (battery absent)
Yenta: CardBus bridge found at 0000:00:0a.0 [104d:802b]
Yenta: ISA IRQ mask 0x0c98, PCI irq 9
Socket status: 30000816
parport_pc 00:0b: activated
parport_pc 00:0b: reported by Plug and Play ACPI
parport0: PC-style at 0x378, irq 7 [PCSPP,EPP]
cs: IO port probe 0x100-0x3af: excluding 0x140-0x147 0x220-0x22f 0x320-0x327 0x388-0x38f
cs: IO port probe 0x3e0-0x4ff: clean.
cs: IO port probe 0x820-0x8ff: clean.
cs: IO port probe 0xc00-0xcf7: clean.
cs: IO port probe 0xa00-0xaff: clean.
kjournald starting.  Commit interval 5 seconds
EXT3-fs warning: maximal mount count reached, running e2fsck is recommended
EXT3 FS on hda2, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3-fs warning: maximal mount count reached, running e2fsck is recommended
EXT3 FS on hda2, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
Adding 197528k swap on /dev/hda5.  Priority:-1 extents:1 across:197528k
kjournald starting.  Commit interval 5 seconds
EXT3-fs warning: maximal mount count reached, running e2fsck is recommended
EXT3 FS on hda2, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
ACPI Error (psargs-0358): [\_TZ_.ATF0] Namespace lookup failure, AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.QREC] (Node c741f400), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.SCID] (Node c741f414), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_GPE._E09] (Node c7419518), AE_NOT_FOUND
ACPI Exception (evgpe-0573): AE_NOT_FOUND, while evaluating GPE method [_E09] [20080321]
ACPI Error (psargs-0358): [\_TZ_.ATF0] Namespace lookup failure, AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.QREC] (Node c741f400), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.SCID] (Node c741f414), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_GPE._E09] (Node c7419518), AE_NOT_FOUND
ACPI Exception (evgpe-0573): AE_NOT_FOUND, while evaluating GPE method [_E09] [20080321]
ACPI Error (psargs-0358): [\_TZ_.ATF0] Namespace lookup failure, AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.QREC] (Node c741f400), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.SCID] (Node c741f414), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_GPE._E09] (Node c7419518), AE_NOT_FOUND
ACPI Exception (evgpe-0573): AE_NOT_FOUND, while evaluating GPE method [_E09] [20080321]
ACPI Error (psargs-0358): [\_TZ_.ATF0] Namespace lookup failure, AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.QREC] (Node c741f400), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.ISA_.SIO_.EC__.SCID] (Node c741f414), AE_NOT_FOUND
ACPI Error (psparse-0530): Method parse/execution failed [\_GPE._E09] (Node c7419518), AE_NOT_FOUND
ACPI Exception (evgpe-0573): AE_NOT_FOUND, while evaluating GPE method [_E09] [20080321]
[^thehatsrule^: added code tags]

[curaga]

Maybe there's an updated bios, to fix the acpi?

[alu]

booting my aleutia with mc 2.2 gives me the same issues. trying to boot with ubuntu hardy, success, so i could get back some infos about my aleutia.

$ cat /proc/interrupts

0: 88695 XT-PIC-XT times
1: 2 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
5: 203 XT-PIC-XT ohci_hcd: usb1
8: 2 XT-PIC-XT rtc0
10: 0 XT-PIC-XT SiS7019
14: 67797 XT-PIC-XT pata_sis
15: 0 XT-PIC-XT pata_sis
NMI: 0 Non-maskable interrupts
LOC: 0 Localtimer interrupts
RES: 0 Rescheduling interrupts
CAL: 0 Function call interrupts
TLB: 0 TLB shootdowns
SPU: 0 Spurious interrupts
ERR: 0
MIS: 0

$ cat /proc/cpuinfo

processor: 0
vendor_id: SiS SiS SiS
cpu family: 5
model: 0
model name: 05/00
stepping: 5
cpu MHZ: 200.006
fdiv_bug: no
hlt_but: no
f00f_bug: no
coma_bug: no
fpu: yes
fpu_exception: yes
cpuid level: 1
up: yes
flags: fpu tsc cx8 mmx up
bogomips: 400.01
dlflush size: 32
power management:

kernel guilty? i mean, it runs quiet well with kernel 2.6.27

[alu]

booting the same aleutia with TC 1.43 works, with the acpi error which Simon has reported, but the desktop is usable; would be interesting to know what makes the difference between tc 1.43 and tc/mc 2.2 if not the kernel

[^thehatsrule^]

Since this stops during the kernel loading, the same result would most likely happen

[andrewb]

‘Is it possible to correct Xvesa screen resolutions for XGA 1024x480 screen?

see:

http://wiki.tinycorelinux.com/tiki-index.php?page=Display+Modes

[gerald_clark]

I suspect the problem is that a 586 class CPU does not include the cmove instruction.
Any kernel not compiled specifically for 586 compatibility will panic when the cmove instruction is encountered.

[curaga]

We build almost everything for 486, so it would be a compiler bug had a 686+ instruction creeped into the kernel.