Re: nr_cpu_ids incorrect on AMD Quad-Core Opteron 8380

[zhiyi]

On 2/02/2010, at 2:57 AM, Borislav Petkov wrote:

> On Sun, Jan 31, 2010 at 11:59 PM, zhiyi <zhuang@xxxxxxxxxxxxxx> wrote:
> > My module worked for a kernel 2.6.29 with CONFIG_NR_CPUS=64 on my  
> > dual
> > quad-core AMD Opteron. The value of nr_cpu_ids I got from the same  
> > module
> > was correct (8).
>
> This could mean that your include/generated/autoconf.h, which is  
> used by
> external modules, is not updated and contains CONFIG_NR_CPUS=8.

I have checked include/linux/autoconf.h in my linux src and found
#define CONFIG_NR_CPUS 64

but I don't see any dir like "generated" under include/

By the way, I compiled my module independent of the compilation of  
Linux tree, i.e. after the kernel is compiled and booted.

Cheers,
Zhiyi


> Do
>
> make mrproper
>
> in your kernel directory by moving your .config out of the way first  
> and
> then rebuild your kernel and external module(s). nr_cpu_ids should  
> pick
> up the updated CONFIG_NR_CPUS value from your .config.
>
> --
> Regards/Gruss,
> Boris


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