* [PATCH] sched/rt: use DIV_ROUND_UP to calculate sysctl_sched_rr_timeslice
@ 2021-03-18 5:53 Hongchen Zhang
0 siblings, 0 replies; only message in thread
From: Hongchen Zhang @ 2021-03-18 5:53 UTC (permalink / raw)
To: mingo, peterz, linux-kernel
When HZ is 300, the value of sysctl_sched_rr_timeslice is different from
the actual value. Therefore, replace with DIV_ROUND_UP to calculate
sysctl_sched_rr_timeslice.
Signed-off-by: Hongchen Zhang <zhanghongchen@loongson.cn>
---
kernel/sched/rt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index b980cc96604f..c684440eefdb 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -8,7 +8,7 @@
#include "pelt.h"
int sched_rr_timeslice = RR_TIMESLICE;
-int sysctl_sched_rr_timeslice = (MSEC_PER_SEC / HZ) * RR_TIMESLICE;
+int sysctl_sched_rr_timeslice = DIV_ROUND_UP(RR_TIMESLICE * MSEC_PER_SEC, HZ);
static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun);
--
2.27.0
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