On Fri, 15 Apr 2011 10:57:09 EDT, Valdis.Kletnieks@vt.edu said: > On Thu, 14 Apr 2011 15:08:47 PDT, akpm@linux-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] [] warn_slowpath_common+0x7e/0x96 [ 3.860640] [] warn_slowpath_null+0x15/0x17 [ 3.860677] [] worker_enter_idle+0x168/0x19f [ 3.860677] [] worker_thread+0x1ed/0x206 [ 3.860677] [] ? manage_workers+0xc0/0xc0 [ 3.860677] [] kthread+0x7f/0x87 [ 3.860677] [] kernel_thread_helper+0x4/0x10 [ 3.860677] [] ? retint_restore_args+0xe/0xe [ 3.860677] [] ? __init_kthread_worker+0x55/0x55 [ 3.860677] [] ? 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] [] warn_slowpath_common+0x7e/0x96 [ 3.994282] [] warn_slowpath_null+0x15/0x17 [ 3.994381] [] worker_enter_idle+0x168/0x19f [ 3.994381] [] worker_thread+0x1ed/0x206 [ 3.994381] [] ? manage_workers+0xc0/0xc0 [ 3.994381] [] kthread+0x7f/0x87 [ 3.994381] [] kernel_thread_helper+0x4/0x10 [ 3.994381] [] ? retint_restore_args+0xe/0xe [ 3.994381] [] ? __init_kthread_worker+0x55/0x55 [ 3.994381] [] ? 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 Optical® [ 4.327105] usb 1-4.1: Manufacturer: Microsoft [ 4.338620] input: Microsoft Microsoft Trackball Optical® 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 Optical®] 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? ;)