Port ftrace to markers

Porting ftrace to the marker infrastructure.

Don't need to chain to the wakeup tracer from the sched tracer, because markers
support multiple probes connected.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 11 insertions, 3 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index ad95cca4e42e..e2e985eeee78 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2500,7 +2500,9 @@ out_activate:
         success = 1;
 
 out_running:
-        ftrace_wake_up_task(rq, p, rq->curr);
+        trace_mark(kernel_sched_wakeup,
+                "pid %d state %ld ## rq %p task %p rq->curr %p",
+                p->pid, p->state, rq, p, rq->curr);
         check_preempt_curr(rq, p);
 
         p->state = TASK_RUNNING;
@@ -2631,7 +2633,9 @@ void wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
                 p->sched_class->task_new(rq, p);
                 inc_nr_running(rq);
         }
-        ftrace_wake_up_task(rq, p, rq->curr);
+        trace_mark(kernel_sched_wakeup_new,
+                "pid %d state %ld ## rq %p task %p rq->curr %p",
+                p->pid, p->state, rq, p, rq->curr);
         check_preempt_curr(rq, p);
 #ifdef CONFIG_SMP
         if (p->sched_class->task_wake_up)
@@ -2804,7 +2808,11 @@ context_switch(struct rq *rq, struct task_struct *prev,
         struct mm_struct *mm, *oldmm;
 
         prepare_task_switch(rq, prev, next);
-        ftrace_ctx_switch(rq, prev, next);
+        trace_mark(kernel_sched_schedule,
+                "prev_pid %d next_pid %d prev_state %ld "
+                "## rq %p prev %p next %p",
+                prev->pid, next->pid, prev->state,
+                rq, prev, next);
         mm = next->mm;
         oldmm = prev->active_mm;
         /*