Messages in this thread Patch in this message | | | Date | Wed, 26 Oct 2005 00:09:56 -0700 | From | Ravikiran G Thirumalai <> | Subject | [rfc] x86_64: Kconfig changes for NUMA |
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On x86_64 arches, there is no way to choose ACPI_NUMA without having to choose K8_NUMA. CONFIG_K8_NUMA is not needed for Intel EM64T NUMA boxes. It also looks odd if you have to select ACPI_NUMA from the power management menu. This patch fixes those oddities. Patch does the following:
1. Makes NUMA a config option like other arches 2. Makes topology detection options like K8_NUMA dependent on NUMA 3. Choosing ACPI NUMA detection can be done from the standard "Processor type and features" menu
Comments?
Thanks, Kiran
Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Shai Fultheim <shai@scalex86.org>
Index: linux-2.6.14-rc5/arch/x86_64/Kconfig =================================================================== --- linux-2.6.14-rc5.orig/arch/x86_64/Kconfig 2005-10-25 15:13:10.000000000 -0700 +++ linux-2.6.14-rc5/arch/x86_64/Kconfig 2005-10-25 15:14:21.000000000 -0700 @@ -226,22 +226,41 @@ source "kernel/Kconfig.preempt" -config K8_NUMA - bool "K8 NUMA support" - select NUMA +config NUMA + bool "Non Uniform Memory Access (NUMA) Support" depends on SMP + default y if !MPSC + select X86_64_ACPI_NUMA if MPSC + help + Enable NUMA (Non Uniform Memory Access) support. The kernel + will try to allocate memory used by a CPU on the local memory + controller of the CPU and add some more NUMA awareness to the kernel. + This code is recommended on all multiprocessor Opteron systems. + If the system is EM64T, you should say N unless your system is EM64T + NUMA. + +config K8_NUMA + bool "K8 NUMA detection" + depends on NUMA && !MPSC + default y help - Enable NUMA (Non Unified Memory Architecture) support for - AMD Opteron Multiprocessor systems. The kernel will try to allocate - memory used by a CPU on the local memory controller of the CPU - and add some more NUMA awareness to the kernel. - This code is recommended on all multiprocessor Opteron systems - and normally doesn't hurt on others. + Enable K8 NUMA node topology detection. You should say Y here if + you have a multi processor AMD K8 system. + +# Dummy CONFIG option to select ACPI_NUMA from drivers/acpi/Kconfig. + +config X86_64_ACPI_NUMA + bool "ACPI NUMA detection" + depends on NUMA + select ACPI + select ACPI_NUMA + default y + help + Enable ACPI SRAT based node topology detection. config NUMA_EMU - bool "NUMA emulation support" - select NUMA - depends on SMP + bool "NUMA emulation" + depends on NUMA help Enable NUMA emulation. A flat machine will be split into virtual nodes when booted with "numa=fake=N", where N is the @@ -252,9 +271,6 @@ depends on NUMA default y -config NUMA - bool - default n config ARCH_DISCONTIGMEM_ENABLE def_bool y - 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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