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Date: Wed, 27 Apr 2011 16:09:01 +0100
From: "Jan Beulich" <JBeulich@...ell.com>
To: <mingo@...e.hu>, <tglx@...utronix.de>, <hpa@...or.com>
Cc: <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: mark a few more per-CPU items read-mostly
Signed-off-by: Jan Beulich <jbeulich@...ell.com>
---
arch/x86/include/asm/percpu.h | 2 +-
arch/x86/include/asm/processor.h | 4 ++--
arch/x86/include/asm/smp.h | 10 +++++-----
arch/x86/kernel/setup_percpu.c | 4 ++--
arch/x86/kernel/smpboot.c | 10 +++++-----
5 files changed, 15 insertions(+), 15 deletions(-)
--- 2.6.39-rc5/arch/x86/include/asm/percpu.h
+++ 2.6.39-rc5-x86-cpu-info-read-mostly/arch/x86/include/asm/percpu.h
@@ -545,7 +545,7 @@ do { \
#include <asm-generic/percpu.h>
/* We can use this directly for local CPU (faster). */
-DECLARE_PER_CPU(unsigned long, this_cpu_off);
+DECLARE_PER_CPU_READ_MOSTLY(unsigned long, this_cpu_off);
#endif /* !__ASSEMBLY__ */
--- 2.6.39-rc5/arch/x86/include/asm/processor.h
+++ 2.6.39-rc5-x86-cpu-info-read-mostly/arch/x86/include/asm/processor.h
@@ -111,7 +111,7 @@ struct cpuinfo_x86 {
/* Index into per_cpu list: */
u16 cpu_index;
#endif
-} __attribute__((__aligned__(SMP_CACHE_BYTES)));
+};
#define X86_VENDOR_INTEL 0
#define X86_VENDOR_CYRIX 1
@@ -135,7 +135,7 @@ extern __u32 cpu_caps_cleared[NCAPINTS
extern __u32 cpu_caps_set[NCAPINTS];
#ifdef CONFIG_SMP
-DECLARE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info);
+DECLARE_PER_CPU_READ_MOSTLY(struct cpuinfo_x86, cpu_info);
#define cpu_data(cpu) per_cpu(cpu_info, cpu)
#else
#define cpu_info boot_cpu_data
--- 2.6.39-rc5/arch/x86/include/asm/smp.h
+++ 2.6.39-rc5-x86-cpu-info-read-mostly/arch/x86/include/asm/smp.h
@@ -31,12 +31,12 @@ static inline bool cpu_has_ht_siblings(v
return has_siblings;
}
-DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
-DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
+DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
+DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
/* cpus sharing the last level cache: */
-DECLARE_PER_CPU(cpumask_var_t, cpu_llc_shared_map);
-DECLARE_PER_CPU(u16, cpu_llc_id);
-DECLARE_PER_CPU(int, cpu_number);
+DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
+DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
+DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
static inline struct cpumask *cpu_sibling_mask(int cpu)
{
--- 2.6.39-rc5/arch/x86/kernel/setup_percpu.c
+++ 2.6.39-rc5-x86-cpu-info-read-mostly/arch/x86/kernel/setup_percpu.c
@@ -21,7 +21,7 @@
#include <asm/cpu.h>
#include <asm/stackprotector.h>
-DEFINE_PER_CPU(int, cpu_number);
+DEFINE_PER_CPU_READ_MOSTLY(int, cpu_number);
EXPORT_PER_CPU_SYMBOL(cpu_number);
#ifdef CONFIG_X86_64
@@ -30,7 +30,7 @@ EXPORT_PER_CPU_SYMBOL(cpu_number);
#define BOOT_PERCPU_OFFSET 0
#endif
-DEFINE_PER_CPU(unsigned long, this_cpu_off) = BOOT_PERCPU_OFFSET;
+DEFINE_PER_CPU_READ_MOSTLY(unsigned long, this_cpu_off) = BOOT_PERCPU_OFFSET;
EXPORT_PER_CPU_SYMBOL(this_cpu_off);
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly = {
--- 2.6.39-rc5/arch/x86/kernel/smpboot.c
+++ 2.6.39-rc5-x86-cpu-info-read-mostly/arch/x86/kernel/smpboot.c
@@ -117,20 +117,20 @@ int smp_num_siblings = 1;
EXPORT_SYMBOL(smp_num_siblings);
/* Last level cache ID of each logical CPU */
-DEFINE_PER_CPU(u16, cpu_llc_id) = BAD_APICID;
+DEFINE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id) = BAD_APICID;
/* representing HT siblings of each logical CPU */
-DEFINE_PER_CPU(cpumask_var_t, cpu_sibling_map);
+DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
EXPORT_PER_CPU_SYMBOL(cpu_sibling_map);
/* representing HT and core siblings of each logical CPU */
-DEFINE_PER_CPU(cpumask_var_t, cpu_core_map);
+DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
EXPORT_PER_CPU_SYMBOL(cpu_core_map);
-DEFINE_PER_CPU(cpumask_var_t, cpu_llc_shared_map);
+DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
/* Per CPU bogomips and other parameters */
-DEFINE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info);
+DEFINE_PER_CPU_READ_MOSTLY(struct cpuinfo_x86, cpu_info);
EXPORT_PER_CPU_SYMBOL(cpu_info);
atomic_t init_deasserted;
--
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