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Message-ID: <20111117050627.GB14492@zhy> Date: Thu, 17 Nov 2011 13:06:27 +0800 From: Yong Zhang <yong.zhang0@...il.com> To: Valdis.Kletnieks@...edu Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org Subject: Re: linux-next-20111108 lockdep whinge On Wed, Nov 16, 2011 at 10:39:30PM -0500, Valdis.Kletnieks@...edu wrote: > Seen in dmesg during early boot. Not sure if this is a lockdep issue, or a > sched-rt issue, but MAINTAINERS says to ping the same people either way, > so.... :) > > Sorry, no known reproducer, have only seen this once in the last week. Yeah, known issue. Please refer below link: http://marc.info/?l=linux-kernel&m=132082597024248 Thanks, Yong > > [ 4.204350] usb 6-1: USB disconnect, device number 2 > [ 6.660444] usb 6-1: new low-speed USB device number 3 using uhci_hcd > [ 6.683460] INFO: trying to register non-static key. > [ 6.684344] the code is fine but needs lockdep annotation. > [ 6.684417] turning off the locking correctness validator. > [ 6.684417] Pid: 74, comm: irq/20-uhci_hcd Not tainted 3.2.0-rc1-next-20111108 #38 > [ 6.684417] Call Trace: > [ 6.684417] [<ffffffff81069a23>] register_lock_class+0x102/0x2c6 > [ 6.684417] [<ffffffff8106993f>] ? register_lock_class+0x1e/0x2c6 > [ 6.684417] [<ffffffff8106993f>] ? register_lock_class+0x1e/0x2c6 > [ 6.684417] [<ffffffff8106b2d6>] ? validate_chain+0x5a/0x39d > [ 6.684417] [<ffffffff8106b9fb>] __lock_acquire+0xbd/0x3e2 > [ 6.684417] [<ffffffff8102f7ab>] ? double_rq_lock+0x70/0x79 > [ 6.684417] [<ffffffff8106c256>] lock_acquire+0x103/0x153 > [ 6.684417] [<ffffffff8102f7ab>] ? double_rq_lock+0x70/0x79 > [ 6.684417] [<ffffffff815b1614>] _raw_spin_lock_nested+0x3a/0x49 > [ 6.684417] [<ffffffff8102f7ab>] ? double_rq_lock+0x70/0x79 > [ 6.684417] [<ffffffff815b1661>] ? _raw_spin_lock+0x3e/0x45 > [ 6.684417] [<ffffffff8102f78c>] ? double_rq_lock+0x51/0x79 > [ 6.684417] [<ffffffff8102f7ab>] double_rq_lock+0x70/0x79 > [ 6.684417] [<ffffffff8102f803>] double_lock_balance+0x4f/0x5d > [ 6.684417] [<ffffffff8102f86b>] find_lock_lowest_rq+0x5a/0xfe > [ 6.684417] [<ffffffff810353af>] push_rt_task.part.61+0xad/0x149 > [ 6.684417] [<ffffffff81035550>] post_schedule_rt+0x1b/0x23 > [ 6.684417] [<ffffffff8102d707>] post_schedule.part.21+0x2b/0x45 > [ 6.684417] [<ffffffff815af987>] __schedule+0x720/0x766 > [ 6.684417] [<ffffffff8109062f>] ? irq_thread_fn+0x37/0x37 > [ 6.684417] [<ffffffff815afb83>] schedule+0x55/0x57 > [ 6.684417] [<ffffffff810905ba>] irq_thread+0x18b/0x1c9 > [ 6.684417] [<ffffffff8109042f>] ? irq_finalize_oneshot+0xc9/0xc9 > [ 6.684417] [<ffffffff81058ca6>] kthread+0x7f/0x87 > [ 6.684417] [<ffffffff815b96f4>] kernel_thread_helper+0x4/0x10 > [ 6.684417] [<ffffffff815b22e1>] ? retint_restore_args+0xe/0xe > [ 6.684417] [<ffffffff81058c27>] ? __init_kthread_worker+0x55/0x55 > [ 6.684417] [<ffffffff815b96f0>] ? gs_change+0xb/0xb > [ 6.896264] usb 6-1: New USB device found, idVendor=0e8f, idProduct=0020 > [ 6.897516] usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 > [ 6.898848] usb 6-1: Product: PS2toUSB Adapter > [ 6.899718] usb 6-1: Manufacturer: GASIA > [ 6.917981] input: GASIA PS2toUSB Adapter as /devices/pci0000:00/0000:00:1d.0/usb6/6-1/6-1:1.0/input/input13 > -- Only stand for myself -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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