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    Subject3.5.0-rc5: BUG: soft lockup - CPU#0 stuck for 22s
    Hi,

    while trying to upgrade from 3.4.0 to 3.5.0-rc5 on this Powerbook G4
    (powerpc 32 bit), this happens during booting:

    --------------
    usb 2-1: new full-speed USB device number 4 using ohci_hcd
    SCSI subsystem initialized
    scsi0 : SBP-2 IEEE-1394
    scsi1 : SBP-2 IEEE-1394
    firewire_sbp2 fw1.0: logged in to LUN 0000 (0 retries)
    scsi 0:0:0:0: Direct-Access Ext Hard Disk PQ: 0 ANSI: 4

    [25 seconds later]

    BUG: soft lockup - CPU#0 stuck for 22s! [modprobe:695]
    Modules linked in: sd_mod arc4 firewire_sbp2 scsi_mod b43 mac80211 cfg80211
    irq event stamp: 56975532
    hardirqs last enabled at (56975531): <c053aea8>] _raw_spin_unlock_irqrestore+0x40/0x9c
    hardirqs last disabled at (56975532): <c0011688>] reenable_mmu+0x40/0x98
    softirqs last enabled at (56966080): <c000f3f0>] call_do_softirq+0x14/0x24
    softirqs last disabled at (56966073): <c000f3f0>] call_do_softirq+0x14/0x24
    NIP: c053aeac LR: c053aea8 CTR: c009d510
    REGS: eed1fd40 TRAP: 0901 Not tainted (3.5.0-rc5)
    MSR: 00009032 ME IR DR RI > CR: 24042484 XER: 00000000
    TASK = eece5c00[695] 'modprobe' THREAD: eed1e000 #012GPR00: 012GPR08:
    NIP [c053aeac] _raw_spin_unlock_irqrestore+0x44/0x9c
    LR [c053aea8] _raw_spin_unlock_irqrestore+0x40/0x9c
    Call Trace:
    [eed1fdf0] [c053aea8] _raw_spin_unlock_irqrestore+0x40/0x9c (unreliable)
    [eed1fe00] [c005fbd8] lowest_in_progress+0xa8/0xcc
    [eed1fe20] [c005fc5c] async_synchronize_cookie_domain+0x60/0x1f4
    [eed1fe70] [c005fe3c] async_synchronize_full+0x3c/0x74
    [eed1fe90] [c0083908] sys_init_module+0x174/0x1168
    [eed1ff40] [c00117e8] ret_from_syscall+0x0/0x38
    --- Exception: c01 at 0xff5d694#012[ 36.339234] LR = 0x100041c0
    Instruction dump:
    38630010
    73e08000
    --------------

    This is what netconsole was able to receive. I've made a screenshot from
    another boot with the same vanilla 3.5.0-rc5 (today's mainline) and put it
    (along with some more details) up here:

    http://nerdbynature.de/bits/3.5.0-rc5/soft_lockup/

    Any ideas?

    Thanks,
    Christian.
    --
    BOFH excuse #436:

    Daemon escaped from pentagram


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