Stephen Sinclair wrote: > Hello, > > I am trying to install Xenomai. After patching the kernel (I have > tried with 2.6.29.5 and 2.6.30.5), I get the following error message: > > > $ make > scripts/kconfig/conf -s arch/x86/Kconfig > CHK include/linux/version.h > CHK include/linux/utsrelease.h > SYMLINK include/asm -> include/asm-x86 > CC arch/x86/kernel/asm-offsets.s > In file included from include/linux/sched.h:62, > from arch/x86/kernel/asm-offsets_64.c:8, > from arch/x86/kernel/asm-offsets.c:4: > 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 CONFIG_NR_CPUS config variable is set to the default 64, but I > still get this error if I lower it to 4 or 2. (This is a dual-core > machine, AMD X2.) > > I tried commenting-out this error, just to see what would happen, but > I get an oops on boot. Setting the boot flag earlyprintk=vga shows a > backtrace, and the crash happens immediately after > __ipipe_enable_irqdesc, which is in ipipe_virtualize_irq. > > I don't know how to proceed from here, does anyone know why > CONFIG_NR_CPUS is triggering this error?
Could you post the .config that fails to build? Yeah, there is a limitation, normally 96 (IIRC). 2 or 4 CPUs is definitely far below it. Jan
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