On Dec 2, 2009, at 10:36 PM, Thirumalai wrote:
Thank you for your reply. But when i boot smp-linux on thisconfiguration i got into kernel panic. The log is attached with this mail. I am using linux-2.6.30 downloaded from kernel.org and my dts entry for cpu is like this.
<snip>
Calibrating delay loop... 199.68 BogoMIPS (lpj=99840) Mount-cache hash table entries: 512 mpic: requesting IPIs ... Processor 1 found. clockevent: decrementer mult[1999] shift[16] cpu[1] Brought up 2 CPUs Unable to handle kernel paging request for data at address 0x00000004 Faulting instruction address: 0xa0023e10 Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=2 DPVPX0689 Modules linked in: NIP: a0023e10 LR: a0023dd0 CTR: 00000000 REGS: cf841e90 TRAP: 0300 Not tainted (2.6.30-dpvpx0689) MSR: 00009032 <EE,ME,IR,DR> CR: 24004028 XER: 20000000 DAR: 00000004, DSISR: 40000000 TASK = cf83f930[1] 'swapper' THREAD: cf840000 CPU: 0 GPR00: 00000000 cf841f40 cf83f930 00000000 00000000 00000000 cf841f50 00000000 GPR08: 00000000 00000000 00000002 a10018f4 22004082 ffffffff 3fee6c00 3ff94000 GPR16: ffffffbf ffbf7bff 00000000 00000000 00000000 cf83a800 a10018e8 a0491224 GPR24: a0490000 a04558f8 00000000 cf801f20 a1006070 a10018e8 a10018f8 00000000 NIP [a0023e10] __build_sched_domains+0x354/0x464 LR [a0023dd0] __build_sched_domains+0x314/0x464 Call Trace: [cf841f40] [a0023b98] __build_sched_domains+0xdc/0x464 (unreliable) [cf841f90] [a04326ec] sched_init_smp+0x88/0x1e8 [cf841fc0] [a0425a40] kernel_init+0x148/0x1f0 [cf841ff0] [a00131f8] kernel_thread+0x4c/0x68 Instruction dump: 813e0008 2f9c0000 90090004 419e00d4 801e0034 70090100 40820010 801c0034 70090280 408200bc 83fc0008 83be0008 <807f0004> 801d0004 7c630214 907d0004
You took this panic because you tried to access 0x00000004, which is probably not correct. I would also not generally expect to be seeing all these 0xaxxxxxxx addresses in your panic. Can you explain exactly what you've done to this kernel, and send a copy of the entire .dts and the .config?
FYI, 2.6.30 boots SMP just fine on my 8641HPCN board.
Cheers, Becky
---[ end trace 31fd0ba7d8756001 ]--- Kernel panic - not syncing: Attempted to kill init! Rebooting in 180 seconds..