With 2.6.21-rc5-rt8 / i386 . If I disable wakeup timing , and enable interrupt off timing with latency tracing I can cause,
BUG: scheduling with irqs disabled: IRQ-16/0x00000000/909 caller is rt_spin_lock_slowlock+0x94/0x190 [<c010577a>] show_trace_log_lvl+0x3a/0x60 [<c0105fdd>] show_trace+0x2d/0x30 [<c01060c7>] dump_stack+0x27/0x30 [<c03f52db>] schedule+0x12b/0x130 [<c03f6314>] rt_spin_lock_slowlock+0x94/0x190 [<c03f6b35>] rt_spin_lock+0x25/0x30 [<c02f19bf>] serial8250_console_write+0x16f/0x190 [<c012b3aa>] __call_console_drivers+0x7a/0xa0 [<c012b427>] _call_console_drivers+0x57/0xa0 [<c012b58d>] release_console_sem+0xdd/0x1e0 [<c012bd46>] vprintk+0x226/0x3b0 [<c012bef0>] printk+0x20/0x30 [<c0158d29>] print_traces+0x49/0x100 [<c0105792>] show_trace_log_lvl+0x52/0x60 [<c0105fdd>] show_trace+0x2d/0x30 [<c01060c7>] dump_stack+0x27/0x30 [<c0158481>] check_critical_timing+0x2b1/0x380 [<c01585f6>] trace_hardirqs_on+0xa6/0xc0 [<c01046e5>] restore_nocheck+0x12/0x15 ======================= I do this by running, echo 1 > /proc/sys/kernel/preempt_thresh which clearly causes loads of output .. Then while the output is screaming along I hold down the left arrow key and eventually the message above starts to appear often .. Then the system hangs. Also I'm using an NFS root which might help to bring out the error .. Daniel - 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/
