Hello, I am running a 3.0.3 rt11 on an FPGA embedded PowerPC 440. Everything runs fine so far. Currently, I am trying to get an UIO driver working with interrupts (the kernel Oops after a short while, see below). I guess, its something with the connected hardware, that fires too fast. How can I set the UIO kernel driver to a higher priority than my rt-userspace threads? Since I need the rt-threads to be scheduled before TCP priorities are 51 and up. By the way, what is meant by "Kernel panic - not syncing: Fatal exception in interrupt"? Best regards Friedrich -- snip NIP [c02f2030] rt_spin_lock_slowlock+0x98/0x260 LR [c02f1fe8] rt_spin_lock_slowlock+0x50/0x260 Call Trace: [c9ff3ef0] [c02f1fe8] rt_spin_lock_slowlock+0x50/0x260 (unreliable) [c9ff3f50] [c0029a70] __wake_up+0x24/0x58 [c9ff3f70] [c02548f8] uio_event_notify+0x3c/0x64 [c9ff3f80] [c0254970] uio_interrupt+0x50/0x68 [c9ff3f90] [c006a6cc] handle_irq_event_percpu+0x68/0x174 [c9ff3fd0] [c006a82c] handle_irq_event+0x54/0x8c [c9ff3fe0] [c006cf30] handle_edge_irq+0xa8/0x1a8 [c9ff3ff0] [c000b5e4] call_handle_irq+0x18/0x28 [c90c1980] [c000360c] do_IRQ+0xf0/0x14c [c90c19b0] [c000caf8] ret_from_except+0x0/0x18 --- Exception: 501 at rt_spin_lock+0x20/0x28 LR = add_wait_queue+0x28/0x60 [c90c1a70] [20000005] 0x20000005 (unreliable) [c90c1a80] [c00b6df4] __pollwait+0x8c/0x108 [c90c1aa0] [c0253df4] uio_poll+0x4c/0x80 [c90c1ab0] [c00b7308] do_select+0x264/0x4e0 [c90c1db0] [c00b7734] core_sys_select+0x1b0/0x368 [c90c1f00] [c00b7928] sys_select+0x3c/0x14c [c90c1f40] [c000c498] ret_from_syscall+0x0/0x3c --- Exception: c01 at 0xfc61ac4 LR = 0xfc61aa4 Instruction dump: 70090004 408201a8 80010064 bb61004c 38210060 7c0803a6 4e800020 801f0008 5400003c 7fa00278 7c000034 5400d97e <0f000000> 7c000146 38600001 4bd37b75 Kernel panic - not syncing: Fatal exception in interrupt Call Trace: [c9ff3c90] [c0006890] show_stack+0x44/0x154 (unreliable) [c9ff3cd0] [c02f2a34] panic+0xac/0x1d0 [c9ff3d20] [c0008dac] die+0x11c/0x1cc [c9ff3d40] [c0008f58] _exception+0xa4/0x11c [c9ff3e30] [c000caac] ret_from_except_full+0x0/0x4c --- Exception: 700 at rt_spin_lock_slowlock+0x98/0x260 LR = rt_spin_lock_slowlock+0x50/0x260 [c9ff3f50] [c0029a70] __wake_up+0x24/0x58 [c9ff3f70] [c02548f8] uio_event_notify+0x3c/0x64 [c9ff3f80] [c0254970] uio_interrupt+0x50/0x68 [c9ff3f90] [c006a6cc] handle_irq_event_percpu+0x68/0x174 [c9ff3fd0] [c006a82c] handle_irq_event+0x54/0x8c [c9ff3fe0] [c006cf30] handle_edge_irq+0xa8/0x1a8 [c9ff3ff0] [c000b5e4] call_handle_irq+0x18/0x28 [c90c1980] [c000360c] do_IRQ+0xf0/0x14c [c90c19b0] [c000caf8] ret_from_except+0x0/0x18 --- Exception: 501 at rt_spin_lock+0x20/0x28 LR = add_wait_queue+0x28/0x60 [c90c1a70] [20000005] 0x20000005 (unreliable) [c90c1a80] [c00b6df4] __pollwait+0x8c/0x108 [c90c1aa0] [c0253df4] uio_poll+0x4c/0x80 [c90c1ab0] [c00b7308] do_select+0x264/0x4e0 [c90c1db0] [c00b7734] core_sys_select+0x1b0/0x368 [c90c1f00] [c00b7928] sys_select+0x3c/0x14c [c90c1f40] [c000c498] ret_from_syscall+0x0/0x3c --- Exception: c01 at 0xfc61ac4 LR = 0xfc61aa4 -- snip -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
