2022-02-09 09:50:07

by Zhen Ni

Subject: [PATCH] sched: move cfs_bandwidth_slice sysctls to fair.c

move cfs_bandwidth_slice sysctls to fair.c and use the
new register_sysctl_init() to register the sysctl interface.

Signed-off-by: Zhen Ni <[email protected]>
---
include/linux/sched/sysctl.h | 4 ----
kernel/sched/fair.c | 25 +++++++++++++++++++++++--
kernel/sysctl.c | 10 ----------
3 files changed, 23 insertions(+), 16 deletions(-)

diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h
index c19dd5a2c05c..d416d8f45186 100644
--- a/include/linux/sched/sysctl.h
+++ b/include/linux/sched/sysctl.h
@@ -41,10 +41,6 @@ extern unsigned int sysctl_sched_uclamp_util_max;
extern unsigned int sysctl_sched_uclamp_util_min_rt_default;
#endif

-#ifdef CONFIG_CFS_BANDWIDTH
-extern unsigned int sysctl_sched_cfs_bandwidth_slice;
-#endif
-
#ifdef CONFIG_SCHED_AUTOGROUP
extern unsigned int sysctl_sched_autogroup_enabled;
#endif
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 5146163bfabb..32baf28e136f 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -141,8 +141,28 @@ int __weak arch_asym_cpu_priority(int cpu)
*
* (default: 5 msec, units: microseconds)
*/
-unsigned int sysctl_sched_cfs_bandwidth_slice = 5000UL;
-#endif
+static unsigned int sysctl_sched_cfs_bandwidth_slice = 5000UL;
+#ifdef CONFIG_SYSCTL
+static struct ctl_table sched_cfs_bandwidth_sysctls[] = {
+ {
+ .procname = "sched_cfs_bandwidth_slice_us",
+ .data = &sysctl_sched_cfs_bandwidth_slice,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ONE,
+ },
+ {}
+};
+
+static void __init sched_cfs_bandwidth_sysctl_init(void)
+{
+ register_sysctl_init("kernel", sched_cfs_bandwidth_sysctls);
+}
+#else /* !CONFIG_SYSCTL */
+#define sched_cfs_bandwidth_sysctl_init() do { } while (0)
+#endif /* CONFIG_SYSCTL */
+#endif /* CONFIG_CFS_BANDWIDTH */

static inline void update_load_add(struct load_weight *lw, unsigned long inc)
{
@@ -207,6 +227,7 @@ static void update_sysctl(void)
void __init sched_init_granularity(void)
{
update_sysctl();
+ sched_cfs_bandwidth_sysctl_init();
}

#define WMULT_CONST (~0U)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 5ae443b2882e..981a1902d7a4 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1761,16 +1761,6 @@ static struct ctl_table kern_table[] = {
.extra2 = SYSCTL_ONE,
},
#endif
-#ifdef CONFIG_CFS_BANDWIDTH
- {
- .procname = "sched_cfs_bandwidth_slice_us",
- .data = &sysctl_sched_cfs_bandwidth_slice,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ONE,
- },
-#endif
#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
{
.procname = "sched_energy_aware",
--
2.20.1

2022-02-09 23:50:18

by Luis Chamberlain

Subject: Re: [PATCH] sched: move cfs_bandwidth_slice sysctls to fair.c

On Wed, Feb 09, 2022 at 09:30:20AM +0800, Zhen Ni wrote:
> move cfs_bandwidth_slice sysctls to fair.c and use the
> new register_sysctl_init() to register the sysctl interface.
>
> Signed-off-by: Zhen Ni <[email protected]>

Reviewed-by: Luis Chamberlain <[email protected]>

Luis