Re: 2.4.25 SMP - BUG at page_alloc.c:105

From: Matthias Andree
Date: Wed Mar 24 2004 - 16:15:53 EST

On Wed, 24 Mar 2004, Andrew Morton wrote:

> I'd suspect that's just gunk on the stack and that zap_pte_range() freed an
> anonymous page which had a non-null ->mapping. It could be a hardware bug.
> Without seeing the actual value of page->mapping it's hard to know.

Any chance to retrieve that when the machine has been rebooted since? I
fear there is none.

I have these log entries from boot-up (after the crash), seems the BIOS
isn't perfect (Tyan S2460 "Tiger MP" w/ BIOS 1.05):

128MB HIGHMEM available.
896MB LOWMEM available.
ACPI: have wakeup address 0xc0002000
found SMP MP-table at 000f7510
hm, page 000f7000 reserved twice.
hm, page 000f8000 reserved twice.
hm, page 0009f000 reserved twice.
hm, page 000a0000 reserved twice.
On node 0 totalpages: 262144
zone(0): 4096 pages.
zone(1): 225280 pages.
zone(2): 32768 pages.
ACPI: Unable to locate RSDP
Intel MultiProcessor Specification v1.4
Virtual Wire compatibility mode.
Processor #1 Pentium(tm) Pro APIC version 16
Processor #0 Pentium(tm) Pro APIC version 16
I/O APIC #2 Version 17 at 0xFEC00000.
Enabling APIC mode: Flat. Using 1 I/O APICs
Processors: 2
Kernel command line: root=/dev/hda5 vga=791 splash=silent showopts noapic
Initializing CPU#0
Detected 1533.378 MHz processor.
Console: colour dummy device 80x25
Calibrating delay loop... 3060.53 BogoMIPS
Memory: 1032772k/1048576k available (1902k kernel code, 15416k reserved, 636k data, 152k init, 131072k highmem)
Intel machine check reporting enabled on CPU#0.
CPU: After generic, caps: 0383fbff c1cbfbff 00000000 00000000
CPU: Common caps: 0383fbff c1cbfbff 00000000 00000000
CPU0: AMD Athlon(tm) MP 1800+ stepping 02
Intel machine check reporting enabled on CPU#1.
CPU: After generic, caps: 0383fbff c1cbfbff 00000000 00000000
CPU: Common caps: 0383fbff c1cbfbff 00000000 00000000
CPU1: AMD Athlon(tm) Processor stepping 02
Total of 2 processors activated (6121.06 BogoMIPS).
Using local APIC timer interrupts.
calibrating APIC timer ...
..... CPU clock speed is 1533.3658 MHz.
..... host bus clock speed is 266.6723 MHz.
cpu: 0, clocks: 2666723, slice: 888907
cpu: 1, clocks: 2666723, slice: 888907
checking TSC synchronization across CPUs: passed.
Waiting on wait_init_idle (map = 0x2)
All processors have done init_idle
mtrr: your CPUs had inconsistent fixed MTRR settings
mtrr: probably your BIOS does not setup all CPUs
ACPI: Subsystem revision 20040116
ACPI: Interpreter disabled.
PCI: PCI BIOS revision 2.10 entry at 0xfd7e0, last bus=1
PCI: Using configuration type 1
PCI: Probing PCI hardware
PCI: ACPI tables contain no PCI IRQ routing entries
PCI: Probing PCI hardware (bus 00)
BIOS failed to enable PCI standards compliance, fixing this error.
I/O APIC: AMD Errata #22 may be present. In the event of instability try
: booting with the "noapic" option.

Don't waste countless efforts debugging this

Matthias Andree

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