Completes demand paging core implementation

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@2853 7fd9a85b-ad96-42d3-883c-3090e2eb8679

1 files changed, 20 insertions, 6 deletions

diff --git a/nuttx/sched/os_start.c b/nuttx/sched/os_start.c
index ac52c4d664..9e299a9467 100644
--- a/nuttx/sched/os_start.c
+++ b/nuttx/sched/os_start.c
@@ -62,6 +62,9 @@
 #include  "clock_internal.h"
 #include  "timer_internal.h"
 #include  "irq_internal.h"
+#ifdef CONFIG_PAGING
+# include "pg_internal.h"
+#endif
 #ifdef CONFIG_SCHED_WORKQUEUE
 # include "work_internal.h"
 #endif
@@ -172,12 +175,6 @@ pidhash_t g_pidhash[CONFIG_MAX_TASKS];
 pid_t g_worker;
 #endif
 
-/* The task ID of the page fill worker thread */
-
-#ifdef CONFIG_PAGING
-pid_t g_pgworker;
-#endif
-
 /* This is a table of task lists.  This table is indexed by
  * the task state enumeration type (tstate_t) and provides
  * a pointer to the associated static task list (if there
@@ -451,6 +448,23 @@ void os_start(void)
 
   (void)sched_setupidlefiles(&g_idletcb);
 
+  /* Start the page fill worker thread that will resolve page faults.
+   * This should always be the first thread started because it may
+   * have to resolve page faults in other threads
+   */
+
+#ifdef CONFIG_PAGING
+#ifndef CONFIG_CUSTOM_STACK
+  g_pgworker = task_create("pgfill", CONFIG_PAGING_DEFPRIO,
+                           CONFIG_PAGING_STACKSIZE,
+                           (main_t)pg_worker, (const char **)NULL);
+#else
+  g_pgworker = task_create("pgfill", CONFIG_PAGING_DEFPRIO,
+                           (main_t)pg_worker, (const char **)NULL);
+#endif
+  ASSERT(g_pgworker != ERROR);
+#endif
+
   /* Start the worker thread that will perform misc garbage clean-up */
 
 #ifdef CONFIG_SCHED_WORKQUEUE