CONFIG_SMP is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
Symmetric multi-processing support
modulename: ip27-smp.ko
and/orplatsmp.ko
and/orsmp.ko
and/ormpc86xx_smp.ko
and/ortopology.ko
and/orpercpu_counter.ko
and/orallocpercpu.ko
and/ortrampoline.ko
and/ormalta_smp.ko
and/orsim_smp.ko
and/orq-smp.ko
and/orvoyager_smp.ko
and/orlocks.ko
and/orcpu.ko
configname: CONFIG_SMP
Linux/PowerPC Kernel Configuration
└─>Processor support
└─>Symmetric multi-processing support
In linux kernel since version 2.6.12
This enables support for systems with more than one CPU. If you have
a system with only one CPU, say N. If you have a system with more
than one CPU, say Y. Note that the kernel does not currently
support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
since they have inadequate hardware support for multiprocessor
operation.
If you say N here, the kernel will run on single and multiprocessor
machines, but will use only one CPU of a multiprocessor machine. If
you say Y here, the kernel will run on single-processor machines.
On a single-processor machine, the kernel will run faster if you say
N here.
If you don't know what to do here, say N.
a system with only one CPU, say N. If you have a system with more
than one CPU, say Y. Note that the kernel does not currently
support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
since they have inadequate hardware support for multiprocessor
operation.
If you say N here, the kernel will run on single and multiprocessor
machines, but will use only one CPU of a multiprocessor machine. If
you say Y here, the kernel will run on single-processor machines.
On a single-processor machine, the kernel will run faster if you say
N here.
If you don't know what to do here, say N.