Commit 4c501327 authored Nov 29, 2016 by Sebastian Andrzej Siewior Committed by Thomas Gleixner Dec 02, 2016

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>

parent 76f29093

mm/vmstat.c

+9 −7

Original line number	Diff line number	Diff line
		@@ -1720,18 +1720,20 @@ 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)
		node_cpus = cpumask_of_node(node);
		if (cpumask_weight(node_cpus) > 0)
		return;

		node_clear_state(node, N_CPU);

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