Hi, i am getting this. looks like ralf is right and the timer irqs get lost. running with nosmp works like a charm. John CPU Clock: 333MHz Calibrating delay loop... 221.18 BogoMIPS (lpj=442368) pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 512 CPU revision is: 0001954c (MIPS 34Kc) Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes. Primary data cache 16kB, 4-way, VIPT, no aliases, linesize 32 bytes Brought up 2 CPUs INFO: rcu_sched detected stall on CPU 0 (t=15000 jiffies) INFO: rcu_sched detected stall on CPU 1 (t=15000 jiffies) Call Trace: [<802c310c>] dump_stack+0x8/0x34 [<8007e280>] print_cpu_stall+0x40/0xf0 [<8007e630>] __rcu_pending+0x110/0x270 [<8007fa44>] rcu_check_callbacks+0x78/0x180 [<80035234>] update_process_times+0x40/0x6c [<80069acc>] tick_handle_periodic+0x38/0x170 [<8000c8f4>] c0_compare_interrupt+0x78/0xbc [<80077740>] handle_irq_event_percpu+0x78/0x294 [<8007ba08>] handle_percpu_irq+0x8c/0xc0 [<80076dd0>] generic_handle_irq+0x40/0x50 [<80006650>] do_IRQ+0x18/0x28 [<80004aec>] ret_from_irq+0x0/0x4 [<8002e3c0>] __do_softirq+0x84/0x1ac [<8002e744>] do_softirq+0x78/0x80 [<8002e9f4>] irq_exit+0x80/0x8c [<80004aec>] ret_from_irq+0x0/0x4 [<80004ce0>] r4k_wait+0x20/0x40 [<800069d8>] cpu_idle+0x7c/0xa4 Call Trace: [<802c310c>] dump_stack+0x8/0x34 [<8007e280>] print_cpu_stall+0x40/0xf0 [<8007e630>] __rcu_pending+0x110/0x270 [<8007fae4>] rcu_check_callbacks+0x118/0x180 [<80035234>] update_process_times+0x40/0x6c [<80069acc>] tick_handle_periodic+0x38/0x170 [<8000c8f4>] c0_compare_interrupt+0x78/0xbc [<80077740>] handle_irq_event_percpu+0x78/0x294 [<8007ba08>] handle_percpu_irq+0x8c/0xc0 [<80076dd0>] generic_handle_irq+0x40/0x50 [<80006650>] do_IRQ+0x18/0x28 [<80004aec>] ret_from_irq+0x0/0x4 [<8006fcf0>] generic_exec_single+0x98/0xfc [<8006ff3c>] smp_call_function_single+0x1e8/0x1f0 [<800704e0>] smp_call_function+0x28/0x38 [<80070510>] on_each_cpu+0x20/0x64 [<800bbdac>] do_tune_cpucache+0x130/0x238 [<800bc09c>] enable_cpucache+0x60/0xf8 [<800bc4a0>] kmem_cache_create+0x36c/0x554 [<803705e0>] shmem_init+0x60/0xf8 [<80366998>] kernel_init+0x94/0x154 [<80006954>] kernel_thread_helper+0x10/0x18
