Loading include/linux/sched/sysctl.h +3 −0 Original line number Diff line number Diff line Loading @@ -61,6 +61,9 @@ int sched_proc_update_handler(struct ctl_table *table, int write, extern unsigned int sysctl_sched_rt_period; extern int sysctl_sched_rt_runtime; extern unsigned int sysctl_sched_dl_period_max; extern unsigned int sysctl_sched_dl_period_min; #ifdef CONFIG_UCLAMP_TASK extern unsigned int sysctl_sched_uclamp_util_min; extern unsigned int sysctl_sched_uclamp_util_max; Loading kernel/sched/deadline.c +21 −2 Original line number Diff line number Diff line Loading @@ -2634,6 +2634,14 @@ void __getparam_dl(struct task_struct *p, struct sched_attr *attr) attr->sched_flags = dl_se->flags; } /* * Default limits for DL period; on the top end we guard against small util * tasks still getting rediculous long effective runtimes, on the bottom end we * guard against timer DoS. */ unsigned int sysctl_sched_dl_period_max = 1 << 22; /* ~4 seconds */ unsigned int sysctl_sched_dl_period_min = 100; /* 100 us */ /* * This function validates the new parameters of a -deadline task. * We ask for the deadline not being zero, and greater or equal Loading @@ -2646,6 +2654,8 @@ void __getparam_dl(struct task_struct *p, struct sched_attr *attr) */ bool __checkparam_dl(const struct sched_attr *attr) { u64 period, max, min; /* special dl tasks don't actually use any parameter */ if (attr->sched_flags & SCHED_FLAG_SUGOV) return true; Loading @@ -2669,12 +2679,21 @@ bool __checkparam_dl(const struct sched_attr *attr) attr->sched_period & (1ULL << 63)) return false; period = attr->sched_period; if (!period) period = attr->sched_deadline; /* runtime <= deadline <= period (if period != 0) */ if ((attr->sched_period != 0 && attr->sched_period < attr->sched_deadline) || if (period < attr->sched_deadline || attr->sched_deadline < attr->sched_runtime) return false; max = (u64)READ_ONCE(sysctl_sched_dl_period_max) * NSEC_PER_USEC; min = (u64)READ_ONCE(sysctl_sched_dl_period_min) * NSEC_PER_USEC; if (period < min || period > max) return false; return true; } Loading kernel/sysctl.c +14 −0 Original line number Diff line number Diff line Loading @@ -1779,6 +1779,20 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = sched_rt_handler, }, { .procname = "sched_deadline_period_max_us", .data = &sysctl_sched_dl_period_max, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "sched_deadline_period_min_us", .data = &sysctl_sched_dl_period_min, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "sched_rr_timeslice_ms", .data = &sysctl_sched_rr_timeslice, Loading Loading
include/linux/sched/sysctl.h +3 −0 Original line number Diff line number Diff line Loading @@ -61,6 +61,9 @@ int sched_proc_update_handler(struct ctl_table *table, int write, extern unsigned int sysctl_sched_rt_period; extern int sysctl_sched_rt_runtime; extern unsigned int sysctl_sched_dl_period_max; extern unsigned int sysctl_sched_dl_period_min; #ifdef CONFIG_UCLAMP_TASK extern unsigned int sysctl_sched_uclamp_util_min; extern unsigned int sysctl_sched_uclamp_util_max; Loading
kernel/sched/deadline.c +21 −2 Original line number Diff line number Diff line Loading @@ -2634,6 +2634,14 @@ void __getparam_dl(struct task_struct *p, struct sched_attr *attr) attr->sched_flags = dl_se->flags; } /* * Default limits for DL period; on the top end we guard against small util * tasks still getting rediculous long effective runtimes, on the bottom end we * guard against timer DoS. */ unsigned int sysctl_sched_dl_period_max = 1 << 22; /* ~4 seconds */ unsigned int sysctl_sched_dl_period_min = 100; /* 100 us */ /* * This function validates the new parameters of a -deadline task. * We ask for the deadline not being zero, and greater or equal Loading @@ -2646,6 +2654,8 @@ void __getparam_dl(struct task_struct *p, struct sched_attr *attr) */ bool __checkparam_dl(const struct sched_attr *attr) { u64 period, max, min; /* special dl tasks don't actually use any parameter */ if (attr->sched_flags & SCHED_FLAG_SUGOV) return true; Loading @@ -2669,12 +2679,21 @@ bool __checkparam_dl(const struct sched_attr *attr) attr->sched_period & (1ULL << 63)) return false; period = attr->sched_period; if (!period) period = attr->sched_deadline; /* runtime <= deadline <= period (if period != 0) */ if ((attr->sched_period != 0 && attr->sched_period < attr->sched_deadline) || if (period < attr->sched_deadline || attr->sched_deadline < attr->sched_runtime) return false; max = (u64)READ_ONCE(sysctl_sched_dl_period_max) * NSEC_PER_USEC; min = (u64)READ_ONCE(sysctl_sched_dl_period_min) * NSEC_PER_USEC; if (period < min || period > max) return false; return true; } Loading
kernel/sysctl.c +14 −0 Original line number Diff line number Diff line Loading @@ -1779,6 +1779,20 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = sched_rt_handler, }, { .procname = "sched_deadline_period_max_us", .data = &sysctl_sched_dl_period_max, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "sched_deadline_period_min_us", .data = &sysctl_sched_dl_period_min, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "sched_rr_timeslice_ms", .data = &sysctl_sched_rr_timeslice, Loading
