Messages in this thread |  | | | Date | Mon, 13 Nov 2006 15:00:39 +0100 | | From | "Jesper Juhl" <> | | Subject | Re: Dual cores on Core2Duo not detected? |
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On 13/11/06, Shaun Q <shaun@c-think.com> wrote: > Hi there everyone -- > > I'm trying to build a custom kernel for using both cores of my new > Core2Duo E6600 processor... > > I thought this was simply a matter of enabling the SMP support in the > kernel .config and recompiling, but when the kernel comes back up, still > only one core is detected. > > With the default vanilla text-based SuSE 10.1 install, it does find both > cores... > > Anyone have any pointers for me on what I might be missing? >
This is probably not your problem, but it could be, so worth checking. Are you booting with maxcpus=1 on your kernel commandline?
Another thing could be that you need to set CONFIG_NR_CPUS to something more than 2. at least in the past some people observed that depending on hov CPUs/cores got numbered CONFIG_NR_CPUS needed to be set at least as high as the highest numbered core. Try setting it to 8 and see if that makes a difference.
On a related note; you probably also want to enable CONFIG_SCHED_MC in addition to just SMP support.
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