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 --- arch/x86/kernel/cpu/intel_cacheinfo.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'arch/x86/kernel/cpu/intel_cacheinfo.c') diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c index 35c7ebb5742..9921b01fe19 100644 --- a/arch/x86/kernel/cpu/intel_cacheinfo.c +++ b/arch/x86/kernel/cpu/intel_cacheinfo.c @@ -295,7 +295,7 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c) unsigned int new_l2 = 0, new_l3 = 0, i; /* Cache sizes from cpuid(4) */ unsigned int l2_id = 0, l3_id = 0, num_threads_sharing, index_msb; #ifdef CONFIG_X86_HT - unsigned int cpu = (c == &boot_cpu_data) ? 0 : (c - cpu_data); + unsigned int cpu = c->cpu_index; #endif if (c->cpuid_level > 3) { @@ -459,7 +459,7 @@ static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index) struct _cpuid4_info *this_leaf, *sibling_leaf; unsigned long num_threads_sharing; int index_msb, i; - struct cpuinfo_x86 *c = cpu_data; + struct cpuinfo_x86 *c = &cpu_data(cpu); this_leaf = CPUID4_INFO_IDX(cpu, index); num_threads_sharing = 1 + this_leaf->eax.split.num_threads_sharing; @@ -470,8 +470,8 @@ static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index) index_msb = get_count_order(num_threads_sharing); for_each_online_cpu(i) { - if (c[i].apicid >> index_msb == - c[cpu].apicid >> index_msb) { + if (cpu_data(i).apicid >> index_msb == + c->apicid >> index_msb) { cpu_set(i, this_leaf->shared_cpu_map); if (i != cpu && cpuid4_info[i]) { sibling_leaf = CPUID4_INFO_IDX(i, index); -- cgit v1.2.3-70-g09d2