Hi, I have been trying to enable "threadirqs" command line option on 3.10.12 kernel and kernel crashes with NULL pointer access for kthreadd_task in wake_up_process function:
[ 0.000000] Call Trace: [ 0.000000] [<8005544c>] wake_up_process+0xc/0x48 [ 0.000000] [<8004c1b8>] kthread_create_on_node+0x64/0xc4 [ 0.000000] [<8006d338>] __setup_irq+0x130/0x634 [ 0.000000] [<8006d89c>] setup_irq+0x60/0xb4 [ 0.000000] [<8050267c>] icu_of_init+0x1f8/0x2f8 [ 0.000000] [<80517b30>] of_irq_init+0x2c8/0x304 [ 0.000000] [<805007bc>] start_kernel+0x218/0x3a4 But as far as i see, kthreadd_task is initialized in start_kernel --> rest_init function which is much later than setting up interrupts ( init_IRQ ): So my question is, how are systems working which enabled "threadirqs" command line option enabled ( the code flow seems similar even on 3.17 kernel ). Am i missing the obvious? thanks for pointers -- Ajay -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
