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The Monday 2008-01-21 at 11:18 +0100, Andreas Jaeger wrote:

I must be one of the few people on earth running a machine with a single,
non smp, processor, so I usually recompile the kernel to suit. O:-)

You should not see any performance difference, the kernel figures out at
runtime whether it's SMP or not and then uses the correct code.  Check
dmesg for something like:
SMP alternatives: switching to UP code
SMP alternatives: switching to SMP code

You are right, I do see the first line; I just rebooted the default kernel in noapic mode to check some other thing (Bug 350980), and so I checked what you said.

But I also recompile to optimize for the Pentium IV, and some times I dissable some drivers I know I don't use, like pci hotplug - that's if I feel in the mood to search over all the config, there are so many options that oftener I don't dissable anything out of laziness.

- -- Cheers,
       Carlos E. R.
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