Re: qlogic lockdep warning
From: Peter Zijlstra
Date: Thu Jan 21 2010 - 03:23:10 EST
On Wed, 2010-01-20 at 17:10 -0800, Yinghai Lu wrote:
> [ 77.962879] ------------[ cut here ]------------
> [ 77.965784] WARNING: at kernel/lockdep.c:2332
> trace_hardirqs_on_caller+0xc6/0x14b()
> [ 77.977492] Hardware name: Sun
> [ 77.979485] Modules linked in:
> [ 77.994337] Pid: 0, comm: swapper Not tainted
> 2.6.33-rc4-tip-yh-03949-g3a8e3f5-dirty #64
> [ 78.000120] Call Trace:
> [ 78.013298] <IRQ> [<ffffffff81076b54>] warn_slowpath_common+0x7c/0x94
> [ 78.017746] [<ffffffff81cd712c>] ? _raw_spin_unlock_irq+0x30/0x36
> [ 78.035171] [<ffffffff81076b80>] warn_slowpath_null+0x14/0x16
> [ 78.040152] [<ffffffff810a2ae8>] trace_hardirqs_on_caller+0xc6/0x14b
> [ 78.055400] [<ffffffff810a2b7a>] trace_hardirqs_on+0xd/0xf
> [ 78.058951] [<ffffffff81cd712c>] _raw_spin_unlock_irq+0x30/0x36
> [ 78.074889] [<ffffffff816461ef>] qla24xx_msix_default+0x243/0x281
> [ 78.091598] [<ffffffff810a5752>] ? __lock_release+0xa5/0xae
> [ 78.096799] [<ffffffff810c02ae>] handle_IRQ_event+0x53/0x113
> [ 78.111568] [<ffffffff810c2061>] handle_edge_irq+0xf3/0x13b
> [ 78.116255] [<ffffffff81035109>] handle_irq+0x24/0x2f
> [ 78.132063] [<ffffffff81cdc4b4>] do_IRQ+0x5c/0xc3
> [ 78.134684] [<ffffffff81cd7393>] ret_from_intr+0x0/0xf
> [ 78.137903] <EOI> [<ffffffff81039a56>] ? mwait_idle+0xaf/0xbb
> [ 78.155674] [<ffffffff81039a4d>] ? mwait_idle+0xa6/0xbb
> [ 78.158600] [<ffffffff81031c7c>] cpu_idle+0x61/0xa1
> [ 78.174333] [<ffffffff81c85d7a>] rest_init+0x7e/0x80
> [ 78.178122] [<ffffffff82832d1f>] start_kernel+0x316/0x31d
> [ 78.193623] [<ffffffff82832297>] x86_64_start_reservations+0xa7/0xab
> [ 78.198924] [<ffffffff8283237f>] x86_64_start_kernel+0xe4/0xeb
> [ 78.214540] ---[ end trace be4529f30a2e4ef5 ]---
It appears the thing tries to enable IRQs from within an IRQ handler,
naughty.
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