From 92cb7612aee39642d109b8d935ad265e602c0563 Mon Sep 17 00:00:00 2001 From: Mike Travis Date: Fri, 19 Oct 2007 20:35:04 +0200 Subject: x86: convert cpuinfo_x86 array to a per_cpu array cpu_data is currently an array defined using NR_CPUS. This means that we overallocate since we will rarely really use maximum configured cpus. When NR_CPU count is raised to 4096 the size of cpu_data becomes 3,145,728 bytes. These changes were adopted from the sparc64 (and ia64) code. An additional field was added to cpuinfo_x86 to be a non-ambiguous cpu index. This corresponds to the index into a cpumask_t as well as the per_cpu index. It's used in various places like show_cpuinfo(). cpu_data is defined to be the boot_cpu_data structure for the NON-SMP case. Signed-off-by: Mike Travis Acked-by: Christoph Lameter Cc: Andi Kleen Cc: James Bottomley Cc: Dmitry Torokhov Cc: "Antonino A. Daplas" Cc: Mark M. Hoffman Signed-off-by: Andrew Morton Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- include/asm-x86/processor_32.h | 10 ++++++---- include/asm-x86/processor_64.h | 10 ++++++---- include/asm-x86/topology_32.h | 4 ++-- include/asm-x86/topology_64.h | 4 ++-- 4 files changed, 16 insertions(+), 12 deletions(-) (limited to 'include') diff --git a/include/asm-x86/processor_32.h b/include/asm-x86/processor_32.h index 565b6fc5f5b4..13976b086837 100644 --- a/include/asm-x86/processor_32.h +++ b/include/asm-x86/processor_32.h @@ -79,6 +79,7 @@ struct cpuinfo_x86 { unsigned char booted_cores; /* number of cores as seen by OS */ __u8 phys_proc_id; /* Physical processor id. */ __u8 cpu_core_id; /* Core id */ + __u8 cpu_index; /* index into per_cpu list */ #endif } __attribute__((__aligned__(SMP_CACHE_BYTES))); @@ -103,11 +104,12 @@ extern struct tss_struct doublefault_tss; DECLARE_PER_CPU(struct tss_struct, init_tss); #ifdef CONFIG_SMP -extern struct cpuinfo_x86 cpu_data[]; -#define current_cpu_data cpu_data[smp_processor_id()] +DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info); +#define cpu_data(cpu) per_cpu(cpu_info, cpu) +#define current_cpu_data cpu_data(smp_processor_id()) #else -#define cpu_data (&boot_cpu_data) -#define current_cpu_data boot_cpu_data +#define cpu_data(cpu) boot_cpu_data +#define current_cpu_data boot_cpu_data #endif /* diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h index 398c39160fce..e4f19970a82b 100644 --- a/include/asm-x86/processor_64.h +++ b/include/asm-x86/processor_64.h @@ -74,6 +74,7 @@ struct cpuinfo_x86 { __u8 booted_cores; /* number of cores as seen by OS */ __u8 phys_proc_id; /* Physical Processor id. */ __u8 cpu_core_id; /* Core id. */ + __u8 cpu_index; /* index into per_cpu list */ #endif } ____cacheline_aligned; @@ -88,11 +89,12 @@ struct cpuinfo_x86 { #define X86_VENDOR_UNKNOWN 0xff #ifdef CONFIG_SMP -extern struct cpuinfo_x86 cpu_data[]; -#define current_cpu_data cpu_data[smp_processor_id()] +DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info); +#define cpu_data(cpu) per_cpu(cpu_info, cpu) +#define current_cpu_data cpu_data(smp_processor_id()) #else -#define cpu_data (&boot_cpu_data) -#define current_cpu_data boot_cpu_data +#define cpu_data(cpu) boot_cpu_data +#define current_cpu_data boot_cpu_data #endif extern char ignore_irq13; diff --git a/include/asm-x86/topology_32.h b/include/asm-x86/topology_32.h index ae1074603c4b..9040f5a61278 100644 --- a/include/asm-x86/topology_32.h +++ b/include/asm-x86/topology_32.h @@ -28,8 +28,8 @@ #define _ASM_I386_TOPOLOGY_H #ifdef CONFIG_X86_HT -#define topology_physical_package_id(cpu) (cpu_data[cpu].phys_proc_id) -#define topology_core_id(cpu) (cpu_data[cpu].cpu_core_id) +#define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) +#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu)) #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) #endif diff --git a/include/asm-x86/topology_64.h b/include/asm-x86/topology_64.h index 848c17f92226..74c4e184c0d8 100644 --- a/include/asm-x86/topology_64.h +++ b/include/asm-x86/topology_64.h @@ -56,8 +56,8 @@ extern int __node_distance(int, int); #endif #ifdef CONFIG_SMP -#define topology_physical_package_id(cpu) (cpu_data[cpu].phys_proc_id) -#define topology_core_id(cpu) (cpu_data[cpu].cpu_core_id) +#define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) +#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu)) #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) #define mc_capable() (boot_cpu_data.x86_max_cores > 1) -- cgit v1.2.1