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sched/rt: Change the type of 'sysctl_sched_rt_period' from 'unsigned int' to 'int'

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Doing this matches the natural type of 'int' based calculus
in sched_rt_handler(), and also enables the adding in of a
correct upper bounds check on the sysctl interface.

[ mingo: Rewrote the changelog. ]

Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20231008021538.3063250-1-yajun.deng@linux.dev
This commit is contained in:
Yajun Deng 2023-10-08 10:15:38 +08:00 committed by Ingo Molnar
parent f4bb570511
commit 089768dfeb
2 changed files with 4 additions and 4 deletions
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6
kernel/sched/rt.c
View File

@ -16,7 +16,7 @@ struct rt_bandwidth def_rt_bandwidth;
* period over which we measure -rt task CPU usage in us.
* default: 1s
*/
unsigned int sysctl_sched_rt_period = 1000000;
int sysctl_sched_rt_period = 1000000;
/*
* part of the period that we allow rt tasks to run in us.
@ -34,7 +34,7 @@ static struct ctl_table sched_rt_sysctls[] = {
{
.procname = "sched_rt_period_us",
.data = &sysctl_sched_rt_period,
.maxlen = sizeof(unsigned int),
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = sched_rt_handler,
.extra1 = SYSCTL_ONE,
@ -47,7 +47,7 @@ static struct ctl_table sched_rt_sysctls[] = {
.mode = 0644,
.proc_handler = sched_rt_handler,
.extra1 = SYSCTL_NEG_ONE,
.extra2 = SYSCTL_INT_MAX,
.extra2 = (void *)&sysctl_sched_rt_period,
},
{
.procname = "sched_rr_timeslice_ms",

2
kernel/sched/sched.h
View File

@ -105,7 +105,7 @@ extern long calc_load_fold_active(struct rq *this_rq, long adjust);
extern void call_trace_sched_update_nr_running(struct rq *rq, int count);
extern unsigned int sysctl_sched_rt_period;
extern int sysctl_sched_rt_period;
extern int sysctl_sched_rt_runtime;
extern int sched_rr_timeslice;