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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2016-11-29 15:51:14 +0100
committerThomas Gleixner <tglx@linutronix.de>2016-12-02 00:52:35 +0100
commit4c501327b4c67f2b874219f20c41d2619b49c78c (patch)
treee9cb8a9cbb1a4247c58df4ac274840cf976f1e4e /mm/vmstat.c
parent76f290935b1a395ee6c9a14697f16593591d1fe8 (diff)
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mm/vmstat: Avoid on each online CPU loops
Both iterations over online cpus can be replaced by the proper node specific functions. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Michal Hocko <mhocko@suse.com> Cc: linux-mm@kvack.org Cc: rt@linutronix.de Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Vlastimil Babka <vbabka@suse.cz> Link: http://lkml.kernel.org/r/20161129145113.fn3lw5aazjjvdrr3@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'mm/vmstat.c')
-rw-r--r--mm/vmstat.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 0b63ffb5c407..5152cd1c490f 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1720,19 +1720,21 @@ static void __init start_shepherd_timer(void)
static void __init init_cpu_node_state(void)
{
- int cpu;
+ int node;
- for_each_online_cpu(cpu)
- node_set_state(cpu_to_node(cpu), N_CPU);
+ for_each_online_node(node) {
+ if (cpumask_weight(cpumask_of_node(node)) > 0)
+ node_set_state(node, N_CPU);
+ }
}
static void vmstat_cpu_dead(int node)
{
- int cpu;
+ const struct cpumask *node_cpus;
- for_each_online_cpu(cpu)
- if (cpu_to_node(cpu) == node)
- return;
+ node_cpus = cpumask_of_node(node);
+ if (cpumask_weight(node_cpus) > 0)
+ return;
node_clear_state(node, N_CPU);
}