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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-11-29 15:51:14 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-12-02 00:52:35 +0100 |
| commit | 4c501327b4c67f2b874219f20c41d2619b49c78c (patch) | |
| tree | e9cb8a9cbb1a4247c58df4ac274840cf976f1e4e /mm/vmstat.c | |
| parent | 76f290935b1a395ee6c9a14697f16593591d1fe8 (diff) | |
| download | lwn-4c501327b4c67f2b874219f20c41d2619b49c78c.tar.gz lwn-4c501327b4c67f2b874219f20c41d2619b49c78c.zip | |
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.c | 16 |
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); } |