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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>
This commit is contained in:
Sebastian Andrzej Siewior 2016-11-29 15:51:14 +01:00 committed by Thomas Gleixner
parent 76f290935b
commit 4c501327b4
1 changed files with 9 additions and 7 deletions
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16
mm/vmstat.c
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@ -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);
}