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| author | Andi Kleen <ak@suse.de> | 2006-01-11 22:44:57 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:04:56 -0800 |
| commit | 4cef0c61380888af99b054937ed391fb28757836 (patch) | |
| tree | dd385a0dc1ab143285f77e0f5c1923490eddc26f /kernel | |
| parent | fd78f11790c37e2165733699f50450500e63a7b3 (diff) | |
| download | lwn-4cef0c61380888af99b054937ed391fb28757836.tar.gz lwn-4cef0c61380888af99b054937ed391fb28757836.zip | |
[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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index d129e560cc0d..c0c60c926d5e 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -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) |