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    SubjectRe: 3.5.0-rc5: BUG: soft lockup - CPU#0 stuck for 22s
    On Sun, 2012-07-01 at 00:18 -0700, Christian Kujau wrote:
    > 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

    Interesting... I observed something roughly similar on a dual G4
    the other day associated with a 30s to 1mn pause during boot. RCU
    was complaining loudly.

    In my case, it did continue booting normally, is that the case for you ?

    Also if I compile the kernel without CONFIG_SMP, it did go away as well,
    do you observe that too ?

    I don't have a spare cycle to investigate this problem this week I'm
    afraid, it might help if you could try a bisection though.


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