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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