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    SubjectRe: [PATCH 2/2] x86_64: Cleanup non-smp usage of cpu maps v3

    * Andrew Morton <> wrote:

    > I now recall that it has been happening on every fifth-odd boot for a
    > few weeks now. The machine prints
    > Time: tsc clocksource has been installed
    > then five instances of "system 00:01: iomem range 0x...", then it
    > hangs. ie: it never prints "system 00:01: iomem range
    > 0xfe600000-0xfe6fffff has been reserved" from
    > It may have some correlation with whether the machine was booted via
    > poweron versus `reboot -f', dunno.

    the tsc thing seems to be an accidental proximity to me.

    such a hard hang has a basic system setup feel to it: the PCI changes in
    2.6.25 or perhaps some ACPI changes. But it could also be timer related
    (although in that case it typically doesnt hang in the middle of a
    system setup sequence)

    i'd say pci=nommconf, but your dmesg has this:

    PCI: Not using MMCONFIG.

    but, what does seem to be new in your dmesg (i happen to have a historic
    dmesg-akpm2.txt of yours saved away) is:

    hpet0: at MMIO 0xfed00000, IRQs 2, 8, 11
    hpet0: 3 64-bit timers, 14318180 Hz

    was hpet active on this box before? Try hpet=disable perhaps - does that
    change anything? (But ... this is still a 10% chance suggestion, there's
    way too many other possibilities for such bugs to occur.)


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