[Xenomai-help] CONFIG_NR_CPUS is too large, please lower it.

[Xenomai-help] CONFIG_NR_CPUS is too large, please lower it.

[Kim Chuan Lim]

May i know how to solve the following problem?

In file included from include/linux/sched.h:64,
                 from arch/x86/kernel/asm-offsets_32.c:8,
                 from arch/x86/kernel/asm-offsets.c:2:
include/linux/ipipe.h:76:2: error: #error "CONFIG_NR_CPUS is too
large, please lower it."
make[1]: *** [arch/x86/kernel/asm-offsets.s] Error 1
make: *** [prepare0] Error 2

the current CONFIG_NR_CPUS is set to 2 in .config file.

The following is my proc/cpuinfo


processor	: 0
vendor_id	: GenuineIntel
cpu family	: 15
model		: 4
model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping	: 10
cpu MHz		: 2400.000
cache size	: 2048 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 1
apicid		: 0
initial apicid	: 0
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm
constant_tsc pebs bts pni dtes64 monitor ds_cpl est cid cx16 xtpr
lahf_lm
bogomips	: 6000.64
clflush size	: 64
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 15
model		: 4
model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping	: 10
cpu MHz		: 2400.000
cache size	: 2048 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 1
apicid		: 1
initial apicid	: 1
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm
constant_tsc pebs bts pni dtes64 monitor ds_cpl est cid cx16 xtpr
lahf_lm
bogomips	: 6000.57
clflush size	: 64
power management:

Re: [Xenomai-help] CONFIG_NR_CPUS is too large, please lower it.

[Gilles Chanteperdrix]

Kim Chuan Lim wrote:
> May i know how to solve the following problem?

Browse the mailing list archives.

-- 
					    Gilles.

Re: [Xenomai-help] CONFIG_NR_CPUS is too large, please lower it.

[Kim Chuan Lim]

google site:https://mail.gna.org/public/xenomai-help CONFIG_NR_CPUS

from the first result
https://mail.gna.org/public/xenomai-help/2009-09/msg00098.html

"Hello,

I finally had the time to investigate more and traced back the error
to a variable related to the number of IRQs on the system.  I should
have previously mentioned that this is a 64-bit system by the way, so
I found several related #ifdefs in irq_vector.h and apicnum.h.

Anyways, I got the kernel to compile properly after disabling the flag
CONFIG_SPARSE_IRQ.  This made the CONFIG_NR_CPUS error go away, even
after setting it back to 64.  Also, it booted successfully, so I am on
to the next stage of my project.

Although, admittedly I have no idea what the potential consequences of
turning off CONFIG_SPARSE_IRQ could be.

thanks,
Steve"


On Thu, Feb 11, 2010 at 4:12 PM, Gilles Chanteperdrix
<gilles.chanteperdrix@xenomai.org> wrote:
>
> Kim Chuan Lim wrote:
> > May i know how to solve the following problem?
>
> Browse the mailing list archives.
>
> --
>                                            Gilles.