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sched/fair: Compile out NUMA code entirely when NUMA is disabled

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Scheduler code is very hot and every little optimization counts. Instead
of constantly checking sched_numa_balancing when NUMA is disabled,
compile it out.

Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Change-Id: I7334594fbe835f615a199cfe02ee526135abab06
This commit is contained in:
Sultan Alsawaf
2021-05-06 00:12:28 -07:00
committed by nisel
parent 3747ca0b54
commit e2dec40cfa
1 changed files with 4 additions and 2 deletions
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6
kernel/sched/fair.c
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@@ -2469,7 +2469,8 @@ void task_numa_fault(int last_cpupid, int mem_node, int pages, int flags)
struct numa_group *ng;
int priv;
if (!static_branch_likely(&sched_numa_balancing))
if (!IS_ENABLED(CONFIG_NUMA_BALANCING) ||
!static_branch_likely(&sched_numa_balancing))
return;
/* for example, ksmd faulting in a user's mm */
@@ -11686,7 +11687,8 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued)
entity_tick(cfs_rq, se, queued);
}
if (static_branch_unlikely(&sched_numa_balancing))
if (IS_ENABLED(CONFIG_NUMA_BALANCING) &&
static_branch_unlikely(&sched_numa_balancing))
task_tick_numa(rq, curr);
update_misfit_status(curr, rq);