score: Scheduler node awareness for thread queues

Maintain the priority of a thread for each scheduler instance via the
thread queue enqueue, extract, priority actions and surrender
operations.  This replaces the primitive priority boosting.

Update #2556.

1 files changed, 6 insertions, 5 deletions

diff --git a/cpukit/score/include/rtems/score/threadq.h b/cpukit/score/include/rtems/score/threadq.h
index 6f62506c26..084161cc4d 100644
--- a/cpukit/score/include/rtems/score/threadq.h
+++ b/cpukit/score/include/rtems/score/threadq.h
@@ -216,6 +216,12 @@ typedef struct {
      * @brief The start of a thread queue path.
      */
     Thread_queue_Link Start;
+
+    /**
+     * @brief In case of a deadlock, a link for the first thread on the path
+     * that tries to enqueue on a thread queue.
+     */
+    Thread_queue_Link Deadlock;
   } Path;
 #endif
 
@@ -345,11 +351,6 @@ typedef struct _Thread_queue_Heads {
 
 #if defined(RTEMS_SMP)
   /**
-   * @brief Boost priority.
-   */
-  Priority_Node Boost_priority;
-
-  /**
    * @brief One priority queue per scheduler instance.
    */
   Thread_queue_Priority_queue Priority[ RTEMS_ZERO_LENGTH_ARRAY ];