Hi, This looks like a tickless stuff
------------[ cut here ]------------ kernel BUG at /mnt/md0/devel/linux-git/kernel/time/tick-sched.c:168! invalid opcode: 0000 [#1] PREEMPT SMP Modules linked in: rtc unix CPU: 0 EIP: 0060:[<c0139ea0>] Not tainted VLI EFLAGS: 00010002 (2.6.20 #53) EIP is at tick_nohz_stop_sched_tick+0x5d/0x1d9 eax: 00000000 ebx: c6021100 ecx: 00000001 edx: c03e74e0 esi: c6022c40 edi: 00000000 ebp: c041dfac esp: c041df78 ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068 Process swapper (pid: 0, ti=c041d000 task=c03e74e0 task.ti=c041d000) Stack: 00000000 c03e7608 c6021b20 00000000 c041dfac 00000296 00000001 c602007b c01000d8 c0451304 c6021100 c0102b42 00000000 c041dfc0 c01023b4 c602ee80 c0453ae4 c602b864 c041dfc8 c010141d c041dff8 c0421a52 c038d4da c04211ed Call Trace: [<c01050f9>] show_trace_log_lvl+0x1a/0x2f [<c01051ab>] show_stack_log_lvl+0x9d/0xa5 [<c01053a0>] show_registers+0x1ed/0x32c [<c01055f7>] die+0x118/0x22f [<c0105787>] do_trap+0x79/0x91 [<c0106017>] do_invalid_op+0x97/0xa1 [<c0311abc>] error_code+0x7c/0x84 [<c01023b4>] cpu_idle+0x1d/0xfb [<c010141d>] rest_init+0x37/0x3a [<c0421a52>] start_kernel+0x459/0x461 [<00000000>] 0x0 ======================= Code: f0 ff ff 8b 40 08 a8 08 0f 85 74 01 00 00 e8 74 e7 0b 00 89 c7 bb 80 13 45 c0 e8 68 e7 0b 00 03 1c 85 00 a6 41 c0 83 3b 00 74 04 <0f> 0b eb fe 8d 45 ec e8 bf c0 ff ff 8b 4d ec 8b 5d f0 83 7e 3c EIP: [<c0139ea0>] tick_nohz_stop_sched_tick+0x5d/0x1d9 SS:ESP 0068:c041df78 Kernel panic - not syncing: Attempted to kill the idle task! BUG: at /mnt/md0/devel/linux-git/arch/i386/kernel/smp.c:547 smp_call_function() [<c01050f9>] show_trace_log_lvl+0x1a/0x2f [<c01057e0>] show_trace+0x12/0x14 [<c0105892>] dump_stack+0x16/0x18 [<c0112792>] smp_call_function+0x61/0x102 [<c0112851>] smp_send_stop+0x1e/0x31 [<c0121ae3>] panic+0x5e/0xfb [<c012463b>] do_exit+0x7a/0x702 [<c01056e8>] die+0x209/0x22f [<c0105787>] do_trap+0x79/0x91 [<c0106017>] do_invalid_op+0x97/0xa1 [<c0311abc>] error_code+0x7c/0x84 [<c01023b4>] cpu_idle+0x1d/0xfb [<c010141d>] rest_init+0x37/0x3a [<c0421a52>] start_kernel+0x459/0x461 [<00000000>] 0x0 ======================= 0xc0139ea0 is in tick_nohz_stop_sched_tick (/mnt/md0/devel/linux-git/kernel/time/tick-sched.c:168). 163 164 if (need_resched()) 165 goto end; 166 167 cpu = smp_processor_id(); 168 BUG_ON(local_softirq_pending()); 169 170 now = ktime_get(); 171 /* 172 * When called from irq_exit we need to account the idle sleep time http://www.stardust.webpages.pl/files/tbf/euridica/2.6.20-git13/boot.log http://www.stardust.webpages.pl/files/tbf/euridica/2.6.20-git13/git-config Regards, Michal -- Michal K. K. Piotrowski LTG - Linux Testers Group (PL) (http://www.stardust.webpages.pl/ltg/) LTG - Linux Testers Group (EN) (http://www.stardust.webpages.pl/linux_testers_group_en/) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/