diff --git a/include/lapi/prctl.h b/include/lapi/prctl.h
index 8ee492259..0b4e196c3 100644
--- a/include/lapi/prctl.h
+++ b/include/lapi/prctl.h
@@ -19,6 +19,11 @@
 # define PR_SET_SECCOMP  22
 #endif
 
+#ifndef PR_SET_TIMERSLACK
+# define PR_SET_TIMERSLACK 29
+# define PR_GET_TIMERSLACK 30
+#endif
+
 #ifndef PR_SET_CHILD_SUBREAPER
 # define PR_SET_CHILD_SUBREAPER	36
 # define PR_GET_CHILD_SUBREAPER	37
diff --git a/runtest/syscalls b/runtest/syscalls
index 4e6310193..76961a684 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -878,6 +878,7 @@ prctl04 prctl04
 prctl05 prctl05
 prctl06 prctl06
 prctl07 prctl07
+prctl08 prctl08
 
 pread01 pread01
 pread01_64 pread01_64
diff --git a/testcases/kernel/syscalls/prctl/.gitignore b/testcases/kernel/syscalls/prctl/.gitignore
index 2178db366..fe36a8e0f 100644
--- a/testcases/kernel/syscalls/prctl/.gitignore
+++ b/testcases/kernel/syscalls/prctl/.gitignore
@@ -6,3 +6,4 @@
 /prctl06
 /prctl06_execve
 /prctl07
+/prctl08
diff --git a/testcases/kernel/syscalls/prctl/prctl08.c b/testcases/kernel/syscalls/prctl/prctl08.c
new file mode 100644
index 000000000..9aa15b06d
--- /dev/null
+++ b/testcases/kernel/syscalls/prctl/prctl08.c
@@ -0,0 +1,135 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2019 FUJITSU LIMITED. All rights reserved.
+ * Author: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
+ *
+ * Test PR_GET_TIMERSLACK and PR_SET_TIMERSLACK of prctl(2).
+ * 1)Each thread has two associated timer slack values: a "default"
+ *   value, and a "current" value. PR_SET_TIMERSLACK sets the "current"
+ *   timer slack value for the calling thread.
+ * 2)When a new thread is created, the two timer slack values are made
+ *   the same as the "current" value of the creating thread.
+ * 3)The maximum timer slack value is ULONG_MAX. On 32bit machines, it
+ *   is a valid value(about 4s). On 64bit machines, it is about 500 years
+ *   and no person will set this over 4s.  prctl return value is int, so
+ *   we test themaximum value is INT_MAX.
+ * 4)we also check current value via /proc/self/timerslack_ns if it is
+ *  supported.
+ */
+
+#include <sys/prctl.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <linux/limits.h>
+#include "lapi/syscalls.h"
+#include "lapi/prctl.h"
+#include "tst_test.h"
+
+#define PROC_TIMERSLACK_PATH "/proc/self/timerslack_ns"
+
+static void check_get_timerslack(char *message, unsigned long value);
+static void check_inherit_timerslack(char *message, unsigned long value);
+
+static struct tcase {
+	void (*func_check)();
+	unsigned long setvalue;
+	unsigned long expvalue;
+	char message[50];
+} tcases[] = {
+	{check_get_timerslack, 0, 50000, "Reset"},
+	{check_get_timerslack, 1, 1, "Min"},
+	{check_get_timerslack, 70000, 70000, "Middle"},
+	{check_get_timerslack, INT_MAX, INT_MAX, "Max"},
+	{check_inherit_timerslack, 70000, 70000, "Child process"},
+};
+
+static int proc_flag = 1;
+
+static void check_proc_timerslack(char *message, unsigned long value)
+{
+	unsigned long proc_value;
+
+	SAFE_FILE_SCANF(PROC_TIMERSLACK_PATH, "%lu", &proc_value);
+	if (proc_value == value)
+		tst_res(TPASS, "%s %s  got %lu expectedly",
+				message, PROC_TIMERSLACK_PATH, proc_value);
+	else
+		tst_res(TFAIL, "%s %s expected %lu got %lu",
+				message, PROC_TIMERSLACK_PATH, value, proc_value);
+}
+
+static void check_get_timerslack(char *message, unsigned long value)
+{
+	TEST(prctl(PR_GET_TIMERSLACK));
+	if ((unsigned long)TST_RET == value)
+		tst_res(TPASS, "%s prctl(PR_GET_TIMERSLACK) got %lu expectedly",
+				message, value);
+	else
+		tst_res(TFAIL, "%s prctl(PR_GET_TIMERSLACK) expected %lu got %lu",
+				message, value, TST_RET);
+
+	if (proc_flag)
+		check_proc_timerslack(message, value);
+
+}
+
+static void check_inherit_timerslack(char *message, unsigned long value)
+{
+	int pid;
+	unsigned long current_value;
+	unsigned long default_value;
+
+	pid = SAFE_FORK();
+	if (pid == 0) {
+		current_value = prctl(PR_GET_TIMERSLACK);
+		prctl(PR_SET_TIMERSLACK, 0);
+		default_value = prctl(PR_GET_TIMERSLACK);
+		if (current_value == value && default_value == value)
+			tst_res(TPASS,
+				"%s two timer slack values are made the same as the current value(%lu) of the creating thread.",
+				message, value);
+		else
+			tst_res(TFAIL,
+				"%s current_value is %lu, default value is %lu, the parent current value is %lu",
+				message, current_value, default_value, value);
+	}
+
+}
+
+static void verify_prctl(unsigned int n)
+{
+	struct tcase *tc = &tcases[n];
+
+	TEST(prctl(PR_SET_TIMERSLACK, tc->setvalue));
+	if (TST_RET == -1) {
+		tst_res(TFAIL | TTERRNO, "prctl(PR_SET_TIMERSLACK, %lu) failed",
+					  tc->setvalue);
+		return;
+	}
+
+	tst_res(TPASS, "prctl(PR_SET_TIMERSLACK, %lu) succeed", tc->setvalue);
+	tc->func_check(tc->message, tc->expvalue);
+}
+
+static void setup(void)
+{
+	if (access(PROC_TIMERSLACK_PATH, F_OK) == -1) {
+		tst_res(TCONF, "proc doesn't support timerslack_ns interface");
+		proc_flag = 0;
+	}
+
+	TEST(prctl(PR_GET_TIMERSLACK));
+	if (TST_RET == 50000)
+		tst_res(TINFO, "current timerslack value is 50us");
+	else
+		tst_brk(TCONF,
+			"current environment doesn't meet test, please set timerslack to 50us");
+}
+
+static struct tst_test test = {
+	.setup = setup,
+	.test = verify_prctl,
+	.tcnt = ARRAY_SIZE(tcases),
+	.forks_child = 1,
+};
