Hi,

I keep seeing the boot arguments "noapic acpi=force irqpoll
pci=routeirq" floating around), however in my case "noapic" disables
one processor.  I get in the logs:

    SMP: Allowing 2 CPUs, 0 hotplug CPUs
    PERCPU: Allocating 32384 bytes of per cpu data
    Built 1 zonelists.  Total pages: 512208
    Kernel command line: auto BOOT_IMAGE=linux ro root=803 
resume2=file:/dev/sda3:0x6e52c0  
        noapic acpi=force irqpoll pci=routeirq
    Misrouted IRQ fixup and polling support enabled
    This may significantly impact system performance

then CPU#0 comes up, then I get:

    SMP alternatives: switching to UP code
    ACPI: Core revision 20060707
    ACPI: setting ELCR to 0200 (from 0c00)
    SMP motherboard not detected.
    Using local APIC timer interrupts.
    result 10390659
    Detected 10.390 MHz APIC timer.
    testing NMI watchdog ... OK.
    SMP disabled
    Brought up 1 CPUs

By contrast, without the "noapic" option The "SMP disabled" part gets
replaced by

    SMP alternatives: switching to SMP code
    Booting processor 1/2 APIC 0x1

and then CPU#1 comes up too.

How come that you guys are using "noapic" then?  What am I missing?  I
am running a 64-bit installation; my kernel config can be seen at
<http://turing.ubishops.ca/misc/config-2.6.19-mactel>.

Thanks,
Stefan

-- 
If it was so, it might be; and if it were so, it would be; but as
it isn't, it ain't.  That's logic.
    --Lewis Carroll, Through the Looking-Glass

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