Hi, Am trying to build SMP kernel. Took kernel-2.6.18-194.src.rpm, extracted, rpmbuilded with SMP option. Successfully compile the new kernel and when using that kernel to boot up, following errors were shown up(highlighted in bold & red color): My kernel config file has ACPI and PCI configs enabled. Any pointers to what caused the problem are appreciated. *************************************************************************************************************** BIOS-e820: 0000000000010000 - 000000000009e000 (usable) BIOS-e820: 000000000009e000 - 00000000000a0000 (reserved) BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 000000001fee9000 (usable) BIOS-e820: 000000001fee9000 - 0000000020000000 (reserved) BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved) 0MB HIGHMEM available. 510MB LOWMEM available. Memory for crash kernel (0x0 to 0x0) notwithin permissible range disabling kdump Using x86 segment limits to approximate NX protection DMI not present or invalid. Using APIC driver default ACPI: Unable to locate RSDP Allocating PCI resources starting at 30000000 (gap: 20000000:dff00000) Detected 1000.103 MHz processor. Built 1 zonelists. Total pages: 130793 Kernel command line: root=/dev/ram ramdisk_size=200000 ramdisk_start=0x6000000 c onsole=ttyS0,9600n8 plat=bryce reboot=warm n Local APIC disabled by BIOS -- you can enable it with "lapic" Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Initializing CPU#0 CPU 0 irqstacks, hard=c076f000 soft=c074f000 PID hash table entries: 2048 (order: 11, 8192 bytes) Console: colour dummy device 80x25 Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) Memory: 503320k/523172k available (2189k kernel code, 19224k reserved, 920k data , 232k init, 0k highmem) Checking if this processor honours the WP bit even in supervisor mode... Ok. Calibrating delay loop (skipped), value calculated using timer frequency.. 2000. 20 BogoMIPS (lpj=1000103) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 512 CPU: L1 I cache: 32K, L1 D cache: 32K CPU: L2 cache: 512K Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. Checking 'hlt' instruction... OK. SMP alternatives: switching to UP code Freeing SMP alternatives: 14k freed CPU0: Intel(R) Celeron(R) M processor 1.00GHz stepping 08 SMP motherboard not detected. Local APIC not detected. Using dummy APIC emulation. Brought up 1 CPUs *checking if image is initramfs... it is Freeing initrd memory: 10554k freed NET: Registered protocol family 16 PCI: PCI BIOS revision 2.10 entry at 0xff67f, last bus=4 PCI: Using configuration type 1 Setting up standard PCI resources ACPI: Interpreter disabled. Linux Plug and Play Support v0.97 (c) Adam Belay pnp: PnP ACPI: disabled usbcore: registered new driver usbfs usbcore: registered new driver hub PCI: Probing PCI hardware ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found PCI quirk: region 1000-107f claimed by ICH4 ACPI/GPIO/TCO PCI quirk: region 0500-053f claimed by ICH4 GPIO ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.2 ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found ACPI Error (tbxfroot-0645): No valid RSDP was found [20060707] ACPI Exception (tbxfroot-0400): AE_NOT_FOUND, RSDP structure not found - Flags=8 [20060707] ACPI: System description tables not found* PCI: Transparent bridge - 0000:00:1e.0 NetLabel: Initializing NetLabel: domain hash size = 128 NetLabel: protocols = UNLABELED CIPSOv4 NetLabel: unlabeled traffic allowed by default PCI: Bridge: 0000:00:02.0 IO window: c000-0000 MEM window: c0100000-00000000 PREFETCH window: disabled. PCI: Bridge: 0000:00:03.0 IO window: disabled. MEM window: disabled. PREFETCH window: disabled. PCI: Bridge: 0000:00:1c.0 IO window: disabled. MEM window: disabled. PREFETCH window: disabled. PCI: Bridge: 0000:00:1e.0 IO window: disabled. MEM window: disabled. PREFETCH window: disabled. PCI: No IRQ known for interrupt pin A of device 0000:00:02.0. Please try using p ci=biosirq. PCI: No IRQ known for interrupt pin A of device 0000:00:03.0. Please try using p ci=biosirq. NET: Registered protocol family 2 IP route cache hash table entries: 4096 (order: 2, 16384 bytes) TCP established hash table entries: 16384 (order: 5, 131072 bytes) TCP bind hash table entries: 8192 (order: 4, 65536 bytes) TCP: Hash tables configured (established 16384 bind 8192) TCP reno registered apm: BIOS not found. audit: initializing netlink socket (disabled) type=2000 audit(1300527457.278:1): initialized Total HugeTLB memory allocated, 0 VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) Initializing Cryptographic API alg: No test for crc32c (crc32c-generic) ksign: Installing public key data Loading keyring io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered (default) pcieport-driver 0000:00:02.0: device [8086:3595] has invalid IRQ; check vendor B IOS pcieport-driver 0000:00:03.0: device [8086:3596] has invalid IRQ; check vendor B IOS pci_hotplug: PCI Hot Plug PCI Core version: 0.5 ************************************************************************************************************************** -- -- Krishna Mohan B