Stress testing kernel-smp-2.4.2-0.1.19.i686 on an ABIT BP-6 motherboard with 256 MB RAM. About halfway through the stress test (which contained sustained load average of about 7-8, with plenty of disk and network activity), the following was logged to syslog: Mar 3 15:16:18 localhost kernel: APIC error on CPU0: 00(02) The machine continued to finish the stress test, with no apparent ill effects. 00:00.0 Class 0600: 8086:7190 (rev 03) 00:01.0 Class 0604: 8086:7191 (rev 03) 00:07.0 Class 0601: 8086:7110 (rev 02) 00:07.1 Class 0101: 8086:7111 (rev 01) 00:07.2 Class 0c03: 8086:7112 (rev 01) 00:07.3 Class 0680: 8086:7113 (rev 02) 00:0d.0 Class 0100: 9005:0010 00:0f.0 Class 0200: 10ec:8029 00:13.0 Class 0180: 1103:0004 (rev 01) 00:13.1 Class 0180: 1103:0004 (rev 01) 01:00.0 Class 0300: 121a:0005 (rev 01) 00:00.0 Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge (rev 03) Flags: bus master, medium devsel, latency 32 Memory at e0000000 (32-bit, prefetchable) [size=64M] Capabilities: [a0] AGP version 1.0 00:01.0 PCI bridge: Intel Corporation 440BX/ZX - 82443BX/ZX AGP bridge (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, 66Mhz, medium devsel, latency 64 Bus: primary=00, secondary=01, subordinate=01, sec-latency=32 I/O behind bridge: 00009000-00009fff Memory behind bridge: e4000000-e7ffffff Prefetchable memory behind bridge: e8000000-e9ffffff 00:07.0 ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 02) Flags: bus master, medium devsel, latency 0 00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01) (prog-if 80 [Master]) Flags: bus master, medium devsel, latency 32 I/O ports at f000 [size=16] 00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01) (prog-if 00 [UHCI]) Flags: bus master, medium devsel, latency 32, IRQ 9 I/O ports at a000 [size=32] 00:07.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 02) Flags: medium devsel, IRQ 9 00:0d.0 SCSI storage controller: Adaptec AHA-2940U2/W Subsystem: Adaptec: Unknown device 2180 Flags: bus master, medium devsel, latency 32, IRQ 5 BIST result: 00 I/O ports at a400 [size=256] Memory at ec000000 (64-bit, non-prefetchable) [size=4K] Expansion ROM at ea000000 [disabled] [size=128K] Capabilities: [dc] Power Management version 1 00:0f.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8029(AS) Flags: medium devsel, IRQ 10 I/O ports at a800 [size=32] 00:13.0 Unknown mass storage controller: Triones Technologies, Inc. HPT366 (rev 01) Flags: bus master, medium devsel, latency 120, IRQ 11 I/O ports at ac00 [size=8] I/O ports at b000 [size=4] I/O ports at b400 [size=256] Expansion ROM at eb000000 [disabled] [size=128K] 00:13.1 Unknown mass storage controller: Triones Technologies, Inc. HPT366 (rev 01) Flags: bus master, medium devsel, latency 120, IRQ 11 I/O ports at b800 [size=8] I/O ports at bc00 [size=4] I/O ports at c000 [size=256] 01:00.0 VGA compatible controller: 3Dfx Interactive, Inc. Voodoo 3 (rev 01) (prog-if 00 [VGA]) Subsystem: 3Dfx Interactive, Inc. Voodoo3 3500 TV (NTSC) Flags: 66Mhz, fast devsel, IRQ 10 Memory at e4000000 (32-bit, non-prefetchable) [size=32M] Memory at e8000000 (32-bit, prefetchable) [size=32M] I/O ports at 9000 [size=256] Expansion ROM at e6000000 [disabled] [size=64K] Capabilities: [54] AGP version 1.0 Capabilities: [60] Power Management version 1
I'm resolving this "NOTABUG" because it is not a kernel bug. It is, however, a bug in your hardware. The 2.2 kernel did not report this bug, which is probably why you didn't see it then...