Hi, as soon as I booted my dual PA8600 with 2.6.25 I got 1 CPU less. The only other kernel I successfully used on that box is Debian's 2.6.22-3. Debian never built 2.6.23 for parisc, 2.6.24 was still hanging last time I checked it, 2.6.25 did not even build until recent -rc. So I am not in the best position to bisect. Here is the relevant dmesg. Cheers, Domenico Linux version 2.6.25-02519-g3925e6f (cavok@ska) (gcc version 4.1.3 20080308 (prerelease) (Debian 4.1.2-21)) #4 SMP Sun Apr 20 04:53:48 FP[0] enabled: Rev 1 Model 16 The 64-bit Kernel has started... console [ttyB0] enabled Initialized PDC Console for debugging. Determining PDC firmware type: System Map. model 00005d10 00000491 00000000 00000002 77b406fc 100000f0 00000008 000000b2 000000b2 vers 00000300 CPUID vers 17 rev 10 (0x0000022a) capabilities 0x3 model 9000/785/J5600 Total Memory: 3840 MB LCD display at fffffff0f05d0008,fffffff0f05d0000 registered SMP: bootstrap CPU ID is 0 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 969600 Kernel command line: root=/dev/sdb5 panic=60 HOME=/ console=ttyS0 TERM=vt102 palo_kernel=2/vmlinux PID hash table entries: 4096 (order: 12, 32768 bytes) Console: colour dummy device 160x64 Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes) Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes) Memory: 3858944k/3932160k available (2916k kernel code, 72892k reserved, 1283k data, 240k init) virtual kernel memory layout: vmalloc : 0x0000000000008000 - 0x000000003f000000 (1007 MB) memory : 0x0000000040000000 - 0x0000000130000000 (3840 MB) .init : 0x00000000405b0000 - 0x00000000405ec000 ( 240 kB) .data : 0x00000000403d9160 - 0x000000004051a000 (1283 kB) .text : 0x0000000040100000 - 0x00000000403d9160 (2916 kB) SLUB: Genslabs=12, HWalign=64, Order=0-1, MinObjects=4, CPUs=2, Nodes=1 Security Framework initialized Capability LSM initialized Mount-cache hash table entries: 256 Brought up 1 CPUs net_namespace: 1168 bytes NET: Registered protocol family 16 EISA bus registered Searching for devices... Found devices: 1. Astro BC Runway Port at 0xfffffffffed00000 [10] { 12, 0x0, 0x582, 0x0000b } 2. Elroy PCI Bridge at 0xfffffffffed30000 [10/0] { 13, 0x0, 0x782, 0x0000a } 3. Elroy PCI Bridge at 0xfffffffffed32000 [10/1] { 13, 0x0, 0x782, 0x0000a } 4. Elroy PCI Bridge at 0xfffffffffed34000 [10/2] { 13, 0x0, 0x782, 0x0000a } 5. Elroy PCI Bridge at 0xfffffffffed38000 [10/4] { 13, 0x0, 0x782, 0x0000a } 6. Elroy PCI Bridge at 0xfffffffffed3c000 [10/6] { 13, 0x0, 0x782, 0x0000a } 7. Forte W+ 2w at 0xfffffffffffa0000 [32] { 0, 0x0, 0x5d1, 0x00004 } 8. Forte W+ 2w at 0xfffffffffffa2000 [34] { 0, 0x0, 0x5d1, 0x00004 } 9. Memory at 0xfffffffffed10200 [49] { 1, 0x0, 0x09e, 0x00009 } Enabling regular chassis codes support v0.05 Releasing cpu 1 now, hpa=fffffffffffa2000 SMP: CPU:1 is stuck. CPU(s): 2 x PA8600 (PCX-W+) at 552.000000 MHz Setting cache flush threshold to f84c0 (1 CPUs online) SBA found Astro 2.1 at 0xfffffffffed00000 Elroy version TR2.1 (0x2) found at 0xfffffffffed30000 PCI: Enabled native mode for NS87415 (pif=0x8f) Elroy version TR2.1 (0x2) found at 0xfffffffffed32000 Elroy version TR2.1 (0x2) found at 0xfffffffffed34000 Elroy version TR2.1 (0x2) found at 0xfffffffffed38000 Elroy version TR2.1 (0x2) found at 0xfffffffffed3c000 iosapic: hpa not registered for 0000:04:07.0 powersw: Soft power switch at 0xfffffff0f0400804 enabled. ... -----[ Domenico Andreoli, aka cavok --[ http://www.dandreoli.com/gpgkey.asc ---[ 3A0F 2F80 F79C 678A 8936 4FEE 0677 9033 A20E BC50 -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html