Commit 80855f73 authored by Mike Travis's avatar Mike Travis Committed by Ingo Molnar
Browse files

cpumask: use alloc_cpumask_var_node where appropriate

Impact: Reduce inter-node memory traffic.

Reduces inter-node memory traffic (offloading the global system bus)
by allocating referenced struct cpumasks on the same node as the
referring struct.
Signed-off-by: default avatarMike Travis <>
Signed-off-by: default avatarIngo Molnar <>
parent 2fdf66b4
......@@ -547,8 +547,9 @@ static int __init acpi_cpufreq_early_init(void)
return -ENOMEM;
for_each_possible_cpu(i) {
if (!alloc_cpumask_var(&per_cpu_ptr(acpi_perf_data, i)
->shared_cpu_map, GFP_KERNEL)) {
if (!alloc_cpumask_var_node(
&per_cpu_ptr(acpi_perf_data, i)->shared_cpu_map,
GFP_KERNEL, cpu_to_node(i))) {
/* Freeing a NULL pointer is OK: alloc_percpu zeroes. */
......@@ -212,11 +212,11 @@ static struct irq_cfg *get_one_free_irq_cfg(int cpu)
cfg = kzalloc_node(sizeof(*cfg), GFP_ATOMIC, node);
if (cfg) {
/* FIXME: needs alloc_cpumask_var_node() */
if (!alloc_cpumask_var(&cfg->domain, GFP_ATOMIC)) {
if (!alloc_cpumask_var_node(&cfg->domain, GFP_ATOMIC, node)) {
cfg = NULL;
} else if (!alloc_cpumask_var(&cfg->old_domain, GFP_ATOMIC)) {
} else if (!alloc_cpumask_var_node(&cfg->old_domain,
GFP_ATOMIC, node)) {
cfg = NULL;
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment