================================= [ INFO: inconsistent lock state ] 2.6.20-1.3094.fc7 #1 --------------------------------- inconsistent {hardirq-on-W} -> {in-hardirq-W} usage. swapper/0 [HC1[1]:SC0[0]:HE0:SE1] takes: (&port_lock_key){++..}, at: [<c0558f96>] serial8250_interrupt+0x4a/0xe0 {hardirq-on-W} state was registered at: [<c044021d>] __lock_acquire+0x448/0xba9 [<c0440d70>] lock_acquire+0x56/0x6f [<c060ffd1>] _spin_lock+0x2b/0x38 [<c055893b>] serial8250_backup_timeout+0x6d/0xe8 [<c042c972>] run_timer_softirq+0x121/0x189 [<c0429dfb>] __do_softirq+0x6f/0xe2 [<c0407a64>] do_softirq+0x61/0xd0 [<ffffffff>] 0xffffffff irq event stamp: 332718 hardirqs last enabled at (332717): [<c0403dde>] default_idle+0x3e/0x59 hardirqs last disabled at (332718): [<c0406054>] common_interrupt+0x24/0x40 softirqs last enabled at (332708): [<c0429e68>] __do_softirq+0xdc/0xe2 softirqs last disabled at (332691): [<c0407a64>] do_softirq+0x61/0xd0
other info that might help us debug this: 1 lock held by swapper/0: #0: (&irq_lists[i].lock){+...}, at: [<c0558f61>] serial8250_interrupt+0x15/0xe0 stack backtrace: [<c0406832>] show_trace_log_lvl+0x1a/0x2f [<c0406df1>] show_trace+0x12/0x14 [<c0406e75>] dump_stack+0x16/0x18 [<c043ed13>] print_usage_bug+0x141/0x14b [<c043f402>] mark_lock+0xa2/0x419 [<c044018e>] __lock_acquire+0x3b9/0xba9 [<c0440d70>] lock_acquire+0x56/0x6f [<c060ffd1>] _spin_lock+0x2b/0x38 [<c0558f96>] serial8250_interrupt+0x4a/0xe0 [<c045699a>] handle_IRQ_event+0x1a/0x46 [<c0457a8a>] handle_fasteoi_irq+0x7d/0xb6 [<c0407b84>] do_IRQ+0xb1/0xd9 - 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/