Set MAXSMP to enable a configuration with the maximum amount of CPUS and NODES. Also enables CONFIG_CPUMASK_OFFSTACK which moves cpumask's off the stack (and in structs) when using cpumask_var_t. From: Mike Travis <travis@xxxxxxx> Acked-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx> --- arch/x86/Kconfig | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) --- test-compile.orig/arch/x86/Kconfig +++ test-compile/arch/x86/Kconfig @@ -571,12 +571,20 @@ config IOMMU_HELPER config MAXSMP bool "Configure Maximum number of SMP Processors and NUMA Nodes" - depends on X86_64 && SMP && BROKEN + depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL + select CPUMASK_OFFSTACK default n help Configure maximum number of CPUS and NUMA Nodes for this architecture. If unsure, say N. +if MAXSMP +config NR_CPUS + int + default "4096" +endif + +if !MAXSMP config NR_CPUS int "Maximum number of CPUs (2-512)" if !MAXSMP range 2 512 @@ -591,6 +599,14 @@ config NR_CPUS This is purely to save memory - each supported CPU adds approximately eight kilobytes to the kernel image. +endif + +config CPUMASK_OFFSTACK + bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS + help + Use dynamic allocation for cpumask_var_t, instead of putting + them on the stack. This is a bit more expensive, but avoids + stack overflow. config SCHED_SMT bool "SMT (Hyperthreading) scheduler support" @@ -1027,10 +1043,16 @@ config NUMA_EMU into virtual nodes when booted with "numa=fake=N", where N is the number of nodes. This is only useful for debugging. +if MAXSMP +config NODES_SHIFT + int + default "9" +endif + +if !MAXSMP config NODES_SHIFT - int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP + int "Maximum NUMA Nodes (as a power of 2)" range 1 9 if X86_64 - default "9" if MAXSMP default "6" if X86_64 default "4" if X86_NUMAQ default "3" @@ -1038,6 +1060,7 @@ config NODES_SHIFT help Specify the maximum number of NUMA Nodes available on the target system. Increases memory reserved to accomodate various tables. +endif config HAVE_ARCH_BOOTMEM_NODE def_bool y -- -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
