forked from luck/tmp_suning_uos_patched
[PATCH] x86_64: Make the cpu_*_maps in kernel/sched.c read mostly
They are referred to often so avoid potential false sharing for them. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -3980,12 +3980,12 @@ asmlinkage long sys_sched_setaffinity(pid_t pid, unsigned int len,
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* method, such as ACPI for e.g.
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* method, such as ACPI for e.g.
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*/
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*/
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cpumask_t cpu_present_map;
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cpumask_t cpu_present_map __read_mostly;
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EXPORT_SYMBOL(cpu_present_map);
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EXPORT_SYMBOL(cpu_present_map);
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#ifndef CONFIG_SMP
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#ifndef CONFIG_SMP
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cpumask_t cpu_online_map = CPU_MASK_ALL;
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cpumask_t cpu_online_map __read_mostly = CPU_MASK_ALL;
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cpumask_t cpu_possible_map = CPU_MASK_ALL;
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cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL;
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#endif
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#endif
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long sched_getaffinity(pid_t pid, cpumask_t *mask)
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long sched_getaffinity(pid_t pid, cpumask_t *mask)
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