Messages in this thread Patch in this message |  | | From | Mel Gorman <> | Subject | [PATCH 5/9] sched/fair: Avoid a second scan of target in select_idle_cpu | Date | Mon, 26 Jul 2021 11:22:43 +0100 |
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When select_idle_cpu starts scanning for an idle CPU, it starts with a target CPU that has already been checked by select_idle_sibling. This patch starts with the next CPU instead.
Signed-off-by: Mel Gorman <mgorman@techsingularity.net> --- kernel/sched/fair.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 75ff991a460a..125c020746b8 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6254,7 +6254,7 @@ static int select_idle_cpu(struct task_struct *p, struct sched_domain *sd, bool time = cpu_clock(this); } - for_each_cpu_wrap(cpu, cpus, target) { + for_each_cpu_wrap(cpu, cpus, target + 1) { if (has_idle_core) { i = select_idle_core(p, cpu, cpus, &idle_cpu); if ((unsigned int)i < nr_cpumask_bits) -- 2.26.2
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