I am going to try and answer some of your questions here...
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Originally Posted by paulsiu
3. What happens if I run a Non-SMP kernel on a dual core? Is one of the core inactive then? When I run power management, does it apply to only one of the core or both cores at the same time?
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One of the cores will, in fact, be inactive. I am not sure what power management will do, though it would be interesting to find out.
Quote:
Originally Posted by paulsiu
4. If I recompile my kernel with SMP, I would have to recompile and reinistall all of the modules?
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Yerp. But then, if you recompile your kernel for anything, it is highly recommended that you recompile all of the modules anyway, and in most cases you will have to.