From: Ravikiran G Thirumalai Date: Sat, 5 Nov 2005 16:25:54 +0000 (+0100) Subject: [PATCH] x86_64: Make ACPI NUMA and NUMA emulation peers of K8_NUMA in Kconfig X-Git-Tag: v2.6.15-rc2~95^2~5 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b0bd35e622ffbda2c01dc67a0381c6a18817a29a;p=linux-2.6 [PATCH] x86_64: Make ACPI NUMA and NUMA emulation peers of K8_NUMA in Kconfig 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 AK: I fixed up the dependencies and changed the help texts a bit on top of Kiran's patch. Signed-off-by: Ravikiran Thirumalai Signed-off-by: Shai Fultheim Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig index fd10bf82f8..1d6242a5cd 100644 --- a/arch/x86_64/Kconfig +++ b/arch/x86_64/Kconfig @@ -226,22 +226,42 @@ config SCHED_SMT 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 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 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 "Old style AMD Opteron NUMA detection" + depends on NUMA + default y + help + Enable K8 NUMA node topology detection. You should say Y here if + you have a multi processor AMD K8 system. This uses an old + method to read the NUMA configurtion directly from the builtin + Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA + instead, which also takes priority if both are compiled in. + +# 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 +272,6 @@ config ARCH_DISCONTIGMEM_ENABLE depends on NUMA default y -config NUMA - bool - default n config ARCH_DISCONTIGMEM_ENABLE def_bool y