EDF plugins: don't forget to preempt new tasks on release-master

This fixes a bug that lead to task stacks being used s
simultaneously on two CPUs.

4 files changed, 10 insertions, 4 deletions

diff --git a/litmus/sched_gedf.c b/litmus/sched_gedf.c
index 5e139ae36b..9d07b1b73c 100644
--- a/litmus/sched_gedf.c
+++ b/litmus/sched_gedf.c
@@ -489,8 +489,10 @@ static void gedf_task_new(struct task_struct * t, int on_rq, int running)
                 if (entry->cpu != gedf.release_master) {
                         entry->scheduled = t;
                         t->rt_param.scheduled_on = task_cpu(t);
-                } else
+                } else {
+                        preempt(entry);
                         tsk_rt(t)->scheduled_on = NO_CPU;
+                }
         } else {
                 tsk_rt(t)->scheduled_on = NO_CPU;
         }
diff --git a/litmus/sched_ghq_edf.c b/litmus/sched_ghq_edf.c
index 621d515ccb..a9b1d06dd9 100644
--- a/litmus/sched_ghq_edf.c
+++ b/litmus/sched_ghq_edf.c
@@ -589,8 +589,10 @@ static void ghqedf_task_new(struct task_struct * t, int on_rq, int running)
                 if (entry->cpu != ghqedf.release_master) {
                         entry->scheduled = t;
                         t->rt_param.scheduled_on = task_cpu(t);
-                } else
+                } else {
+                        preempt(entry);
                         tsk_rt(t)->scheduled_on = NO_CPU;
+                }
         } else {
                 tsk_rt(t)->scheduled_on = NO_CPU;
         }
diff --git a/litmus/sched_gq_edf.c b/litmus/sched_gq_edf.c
index e675170cd2..7b6e8ddbe8 100644
--- a/litmus/sched_gq_edf.c
+++ b/litmus/sched_gq_edf.c
@@ -429,7 +429,7 @@ static void gq_task_new(struct task_struct * t, int on_rq, int running)
                    running, on_rm);
 
         if (running && on_rm)
-                set_tsk_need_resched(t);
+                preempt(entry);
 
         if (running && !on_rm) {
                 /* just leave it where it is, CPU was real-time idle */
diff --git a/litmus/sched_gsn_edf.c b/litmus/sched_gsn_edf.c
index 0d24244bee..cbde657ce7 100644
--- a/litmus/sched_gsn_edf.c
+++ b/litmus/sched_gsn_edf.c
@@ -524,8 +524,10 @@ static void gsnedf_task_new(struct task_struct * t, int on_rq, int running)
                 if (entry->cpu != gsnedf.release_master) {
                         entry->scheduled = t;
                         tsk_rt(t)->scheduled_on = task_cpu(t);
-                } else
+                } else {
+                        preempt(entry); /* force resched */
                         tsk_rt(t)->scheduled_on = NO_CPU;
+                }
         } else {
                 t->rt_param.scheduled_on = NO_CPU;
         }