Messages in this thread | | | Date | Mon, 13 Nov 2006 07:54:23 -0800 (PST) | From | Shaun Q <> | Subject | Re: Dual cores on Core2Duo not detected? |
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On Mon, 13 Nov 2006, Jesper Juhl wrote:
> 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? > If only that were it :) Unfortunately, no...
> 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. Yup, mine is set to 8 right now.> > On a related note; you probably also want to enable CONFIG_SCHED_MC in > addition to just SMP support. > Already set. > -- > Jesper Juhl <jesper.juhl@gmail.com> > Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html > Plain text mails only, please http://www.expita.com/nomime.html > Thanks for your help :) Shaun - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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