linux-kernel - Re: mmotm 2011-04-14

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Date:	Fri, 15 Apr 2011 14:53:51 -0400
From:	Valdis.Kletnieks@...edu
To:	akpm@...ux-foundation.org, Tejun Heo <tj@...nel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: mmotm 2011-04-14 - hangs during boot.

On Fri, 15 Apr 2011 10:57:09 EDT, Valdis.Kletnieks@...edu said:
> On Thu, 14 Apr 2011 15:08:47 PDT, akpm@...ux-foundation.org said:
> > The mm-of-the-moment snapshot 2011-04-14-15-08 has been uploaded to
> > 
> >    http://userweb.kernel.org/~akpm/mmotm/
> 
> This throws at least two complaints about lockdep on the way up.  I've had
> several complete hangs as well last night during boot 

Caught them.  Not sure how the WARN_ON_ONCE it's hitting just before it hangs
is related to the actual hang, but I'm betting it's the kernel's last plaintive
cry for help before everything grinds to a halt.

First boot:

[    3.852927] input: PS/2 Generic Mouse as /devices/platform/i8042/serio1/input/input10
[    3.859723] ------------[ cut here ]------------
[    3.859859] WARNING: at kernel/workqueue.c:1217 worker_enter_idle+0x168/0x19f()
[    3.859984] Hardware name: Latitude E6500
[    3.860089] Modules linked in:
[    3.860308] Pid: 11, comm: kworker/1:0 Not tainted 2.6.39-rc3-mmotm0414 #1
[    3.860428] Call Trace:
[    3.860531]  [<ffffffff81037c62>] warn_slowpath_common+0x7e/0x96
[    3.860640]  [<ffffffff81037c8f>] warn_slowpath_null+0x15/0x17
[    3.860677]  [<ffffffff8104e12d>] worker_enter_idle+0x168/0x19f
[    3.860677]  [<ffffffff81050d3f>] worker_thread+0x1ed/0x206
[    3.860677]  [<ffffffff81050b52>] ? manage_workers+0xc0/0xc0
[    3.860677]  [<ffffffff8105472e>] kthread+0x7f/0x87
[    3.860677]  [<ffffffff8156bb94>] kernel_thread_helper+0x4/0x10
[    3.860677]  [<ffffffff81564d84>] ? retint_restore_args+0xe/0xe
[    3.860677]  [<ffffffff810546af>] ? __init_kthread_worker+0x55/0x55
[    3.860677]  [<ffffffff8156bb90>] ? gs_change+0xb/0xb
[    3.860677] ---[ end trace 64d29d8be7ad450b ]---

and wham it was dead hard at that point,no further output.  Next boot, it hit again,
and lived a while longer:

[    3.983798] input: PS/2 Generic Mouse as /devices/platform/i8042/serio1/input/input10
[    3.993411] ------------[ cut here ]------------
[    3.993531] WARNING: at kernel/workqueue.c:1217 worker_enter_idle+0x168/0x19f()
[    3.993658] Hardware name: Latitude E6500
[    3.993764] Modules linked in:
[    3.993951] Pid: 482, comm: kworker/1:1 Not tainted 2.6.39-rc3-mmotm0414 #1
[    3.994065] Call Trace:
[    3.994173]  [<ffffffff81037c62>] warn_slowpath_common+0x7e/0x96
[    3.994282]  [<ffffffff81037c8f>] warn_slowpath_null+0x15/0x17
[    3.994381]  [<ffffffff8104e12d>] worker_enter_idle+0x168/0x19f
[    3.994381]  [<ffffffff81050d3f>] worker_thread+0x1ed/0x206
[    3.994381]  [<ffffffff81050b52>] ? manage_workers+0xc0/0xc0
[    3.994381]  [<ffffffff8105472e>] kthread+0x7f/0x87
[    3.994381]  [<ffffffff8156bb94>] kernel_thread_helper+0x4/0x10
[    3.994381]  [<ffffffff81564d84>] ? retint_restore_args+0xe/0xe
[    3.994381]  [<ffffffff810546af>] ? __init_kthread_worker+0x55/0x55
[    3.994381]  [<ffffffff8156bb90>] ? gs_change+0xb/0xb
[    3.994381] ---[ end trace 604fcd3646d16bcd ]---
[    4.141467] udevadm used greatest stack depth: 4352 bytes left
[    4.225220] usb 1-4.1: new low speed USB device number 5 using ehci_hcd
[    4.326710] usb 1-4.1: New USB device found, idVendor=045e, idProduct=0023
[    4.326831] usb 1-4.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    4.326959] usb 1-4.1: Product: Microsoft Trackball OpticalÂ®
[    4.327105] usb 1-4.1: Manufacturer: Microsoft
[    4.338620] input: Microsoft Microsoft Trackball OpticalÂ® as /devices/pci0000:00/0000:00:1a.7/sb1/1-4/1-4.1/1-4.1:1.0/input/input11
[    4.339775] generic-usb 0003:045E:0023.0001: input,hidraw0: USB HID v1.00 Mouse [Microsoft Micr
osoft Trackball OpticalÂ®] on usb-0000:00:1a.7-4.1/input0
[    4.413229] usb 1-4.2: new full speed USB device number 6 using ehci_hcd
[    4.467320] dracut: luksOpen /dev/sda2 luks-715ceabf-6f58-4251-9373-ed29e8629a7c
[    4.498856] usb 1-4.2: New USB device found, idVendor=0451, idProduct=1446
[    4.498998] usb 1-4.2: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    4.500490] hub 1-4.2:1.0: USB hub found
[    4.500704] hub 1-4.2:1.0: 4 ports detected
[    4.707088] usb 5-1: new full speed USB device number 2 using uhci_hcd
[    4.875565] usb 5-1: New USB device found, idVendor=0a5c, idProduct=5800
[    4.875684] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    4.875805] usb 5-1: Product: 5880

but it then didn't accept keyboard input from the USB keyboard and acted pretty dead.

Any ideas, or am I looking at a weekend of bisecting? ;)



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