AcoSail/kernel_optimize_test
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[PATCH] x86_64: Make the cpu_*_maps in kernel/sched.c read mostly

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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>
This commit is contained in:
Andi Kleen 2006-01-11 22:44:57 +01:00 committed by Linus Torvalds
parent fd78f11790
commit 4cef0c6138
1 changed files with 3 additions and 3 deletions
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kernel/sched.c
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@ -3980,12 +3980,12 @@ asmlinkage long sys_sched_setaffinity(pid_t pid, unsigned int len,
* method, such as ACPI for e.g.
*/
cpumask_t cpu_present_map;
cpumask_t cpu_present_map __read_mostly;
EXPORT_SYMBOL(cpu_present_map);
#ifndef CONFIG_SMP
cpumask_t cpu_online_map = CPU_MASK_ALL;
cpumask_t cpu_possible_map = CPU_MASK_ALL;
cpumask_t cpu_online_map __read_mostly = CPU_MASK_ALL;
cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL;
#endif
long sched_getaffinity(pid_t pid, cpumask_t *mask)