Implementation of the EDZL scheduler.wip-edzl-final

Implementation of the EDZL scheduler.  Zero-laxity points are
tracked by timers while jobs are in the pending state.  Locking
primatives are not supported.

1 files changed, 14 insertions, 1 deletions

diff --git a/include/litmus/rt_param.h b/include/litmus/rt_param.h
index a7a183f34a80..41768f446436 100644
--- a/include/litmus/rt_param.h
+++ b/include/litmus/rt_param.h
@@ -90,6 +90,14 @@ struct rt_job {
          * Increase this sequence number when a job is released.
          */
         unsigned int    job_no;
+    
+#ifdef CONFIG_PLUGIN_EDZL
+        /* boolean indicating zero-laxity state.  We will
+     set this flag explicitly at zero-laxity detection.
+     This makes priority comparison operations more
+     predictable since laxity varies with time */
+        unsigned int    zero_laxity:1;
+#endif    
 };
 
 struct pfair_param;
@@ -113,6 +121,11 @@ struct rt_param {
 
         /* timing parameters */
         struct rt_job           job_params;
+    
+#ifdef CONFIG_PLUGIN_EDZL
+        /* used to trigger zero-laxity detection */
+        struct hrtimer          zl_timer;
+#endif    
 
         /* task representing the current "inherited" task
          * priority, assigned by inherit_priority and
@@ -120,7 +133,7 @@ struct rt_param {
          * could point to self if PI does not result in
          * an increased task priority.
          */
-         struct task_struct*    inh_task;
+    struct task_struct* inh_task;
 
 #ifdef CONFIG_NP_SECTION
         /* For the FMLP under PSN-EDF, it is required to make the task