lkml.org 
[lkml]   [2020]   [Aug]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[RFC PATCH] sched/numa: fix bug in update task scan pe riod
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 <tianchen.dingtianc@alibaba-inc.com>
Signed-off-by: Michael Wang <yun.wang@linux.alibaba.com>
---
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
\
 
 \ /
  Last update: 2020-08-11 10:30    [W:0.065 / U:0.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site