When p->numa_faults_locality[2] > 0, numa_scan_period is doubled, but this array will never be cleared, which causes scanning period always reaching its max value. This patch clears numa_faults_locality after numa_scan_period being doubled to fix this bug.
Signed-off-by: Tianchen Ding <[email protected]> Signed-off-by: Michael Wang <[email protected]> --- kernel/sched/fair.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 1a68a0536add..a61ee408202e 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2180,6 +2180,8 @@ static void update_task_scan_period(struct task_struct *p, p->mm->numa_next_scan = jiffies + msecs_to_jiffies(p->numa_scan_period); + memset(p->numa_faults_locality, 0, + sizeof(p->numa_faults_locality)); return; } -- 2.25.1
