This is mainly to put back the main thread as SCHED_OTHER
when doing disk I/O. (stats dump...)
In some circumstances, disk I/O within an RT task might hang the
system. (deadlock)
---
testcases/realtime/include/librttest.h | 5 +++++
testcases/realtime/lib/librttest.c | 13 +++++++++++++
2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/testcases/realtime/include/librttest.h
b/testcases/realtime/include/librttest.h
index b56f81e..bb30ee7 100644
--- a/testcases/realtime/include/librttest.h
+++ b/testcases/realtime/include/librttest.h
@@ -302,6 +302,11 @@ int set_thread_priority(pthread_t pthread, int prio);
*/
int set_priority(int prio);
+/* Change the priority of the current context (usually called from main())
+ * and its policy to SCHED_OTHER
+ */
+int set_priority_other(int prio);
+
/* all_threads_quit: signal all threads to quit */
void all_threads_quit(void);
diff --git a/testcases/realtime/lib/librttest.c
b/testcases/realtime/lib/librttest.c
index ed1f097..c82fb95 100644
--- a/testcases/realtime/lib/librttest.c
+++ b/testcases/realtime/lib/librttest.c
@@ -267,6 +267,19 @@ int set_priority(int prio)
return ret;
}
+int set_priority_other(int prio)
+{
+ struct sched_param sp;
+ int ret = 0;
+
+ sp.sched_priority = prio;
+ if (sched_setscheduler(0, SCHED_OTHER, &sp) != 0) {
+ perror("sched_setscheduler");
+ ret = -1;
+ }
+ return ret;
+}
+
void join_thread(int i)
{
struct thread *p, *t = NULL;
--
1.5.5.GIT
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