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Merge "trace/sched: set priority to 150 for deadline tasks"

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qctecmdr 2019-12-11 10:26:41 -08:00 • committed by Gerrit - the friendly Code Review server
commit e0070c9612
2 changed files with 17 additions and 2 deletions
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4
include/trace/events/sched.h
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@ -156,11 +156,11 @@ TRACE_EVENT(sched_switch,
TP_fast_assign(
memcpy(__entry->next_comm, next->comm, TASK_COMM_LEN);
__entry->prev_pid = prev->pid;
__entry->prev_prio = prev->prio;
__entry->prev_prio = prev->prio == -1 ? 150 : prev->prio;
__entry->prev_state = __trace_sched_switch_state(preempt, prev);
memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN);
__entry->next_pid = next->pid;
__entry->next_prio = next->prio;
__entry->next_prio = next->prio == -1 ? 150 : next->prio;
/* XXX SCHED_DEADLINE */
),

15
kernel/cpu.c
View file

@ -32,6 +32,7 @@
#include <linux/slab.h>
#include <linux/percpu-rwsem.h>
#include <uapi/linux/sched/types.h>
#include <linux/cpuset.h>
#include <trace/events/power.h>
#define CREATE_TRACE_POINTS
@ -1052,6 +1053,18 @@ static int do_cpu_down(unsigned int cpu, enum cpuhp_state target)
{
int err;
/*
* When cpusets are enabled, the rebuilding of the scheduling
* domains is deferred to a workqueue context. Make sure
* that the work is completed before proceeding to the next
* hotplug. Otherwise scheduler observes an inconsistent
* view of online and offline CPUs in the root domain. If
* the online CPUs are still stuck in the offline (default)
* domain, those CPUs would not be visible when scheduling
* happens on from other CPUs in the root domain.
*/
cpuset_wait_for_hotplug();
cpu_maps_update_begin();
err = cpu_down_maps_locked(cpu, target);
cpu_maps_update_done();
@ -1215,6 +1228,8 @@ static int do_cpu_up(unsigned int cpu, enum cpuhp_state target)
return -EINVAL;
}
cpuset_wait_for_hotplug();
switch_err = switch_to_rt_policy();
if (switch_err < 0)
return switch_err;