zdtm: split sched_prio00 on two parts

sched_prio00 tests only priorities and sched_policy00
tests scheduling policy.

scheduling policy can not be changed in OpenVZ containers.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -20,6 +20,7 @@ static/write_read10
 static/wait00
 static/vdso00
 static/sched_prio00
+static/sched_policy00
 static/file_shared
 static/timers
 static/futex

test/zdtm/live/static/Makefile

@@ -20,6 +20,7 @@ TST_NOFILE	=				\
 		timers				\
 		unbound_sock			\
 		sched_prio00			\
+		sched_policy00			\
 		socket_listen			\
 		socket_udp			\
 		socket6_udp			\

test/zdtm/live/static/sched_policy00.c

+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include <string.h>
+#include <sched.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Check sched policy to be preserved";
+const char *test_author	= "Pavel Emelyanov <xemul@parallels.com>";
+
+static const int parm = 3;
+
+static int do_nothing(void)
+{
+	while (1)
+		sleep(10);
+
+	return -1;
+}
+
+int main(int argc, char ** argv)
+{
+	int pid, ret, err = 0;
+	struct sched_param p;
+
+	test_init(argc, argv);
+
+	pid = fork();
+	if (!pid)
+		return do_nothing();
+
+	p.sched_priority = parm;
+	if (sched_setscheduler(pid, SCHED_RR, &p)) {
+		err("Can't set policy");
+		kill(pid, SIGKILL);
+		return -1;
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	ret = sched_getscheduler(pid);
+	if (ret != SCHED_RR) {
+		fail("Broken/No policy");
+		err++;
+	}
+
+	ret = sched_getparam(pid, &p);
+	if (ret < 0 || p.sched_priority != parm) {
+		fail("Broken prio");
+		err++;
+	}
+
+	if (!err)
+		pass();
+
+	kill(pid, SIGKILL);
+	return err;
+}

test/zdtm/live/static/sched_prio00.c

@@ -12,7 +12,7 @@
 const char *test_doc	= "Check sched prios to be preserved";
 const char *test_author	= "Pavel Emelyanov <xemul@parallels.com>";
 
-#define NRTASKS	4
+#define NRTASKS	3
 
 static int do_nothing(void)
 {
@@ -36,42 +36,26 @@ int main(int argc, char ** argv)
 
 	test_init(argc, argv);
 
-	/* first 3 -- normal */
 	parm[0] = -20;
 	parm[1] = 19;
 	parm[2] = 1;
-	parm[3] = 3;
-
-	/* next 1 -- RR */
 
 	for (i = 0; i < NRTASKS; i++) {
 		pid[i] = fork();
 		if (!pid[i])
 			return do_nothing();
 
-		if (i < 3) {
 		if (setpriority(PRIO_PROCESS, pid[i], parm[i])) {
 			err("Can't set prio %d", i);
 			kill_all(pid, i);
 			return -1;
 		}
-		} else {
-			struct sched_param p;
-
-			p.sched_priority = parm[i];
-			if (sched_setscheduler(pid[i], SCHED_RR, &p)) {
-				err("Can't set policy %d", i);
-				kill_all(pid, i);
-				return -1;
-			}
-		}
 	}
 
 	test_daemon();
 	test_waitsig();
 
 	for (i = 0; i < NRTASKS; i++) {
-		if (i < 3) {
 		errno = 0;
 		ret = getpriority(PRIO_PROCESS, pid[i]);
 		if (errno) {
@@ -83,21 +67,6 @@ int main(int argc, char ** argv)
 			fail("Broken nice for %d", i);
 			break;
 		}
-		} else {
-			struct sched_param p;
-
-			ret = sched_getscheduler(pid[i]);
-			if (ret != SCHED_RR) {
-				fail("Broken/No policy for %d", i);
-				break;
-			}
-
-			ret = sched_getparam(pid[i], &p);
-			if (ret < 0 || p.sched_priority != parm[i]) {
-				fail("Broken prio for %d", i);
-				break;
-			}
-		}
 	}
 
 	if (i == NRTASKS)