diff --git a/include/libswap.h b/include/libswap.h
index 8c75e20ae..85ba88ed6 100644
--- a/include/libswap.h
+++ b/include/libswap.h
@@ -11,10 +11,22 @@
 #ifndef __LIBSWAP_H__
 #define __LIBSWAP_H__
 
+enum swapfile_method {
+    SWAPFILE_BY_SIZE,
+    SWAPFILE_BY_BLKS
+};
+
 /*
- * Make a swap file
+ * Create a swapfile of a specified size or number of blocks.
  */
-int make_swapfile(const char *swapfile, int blocks, int safe);
+int make_swapfile(const char *swapfile, unsigned int num,
+			int safe, enum swapfile_method method);
+
+#define MAKE_SWAPFILE_SIZE(swapfile, size, safe) \
+    make_swapfile(swapfile, size, safe, SWAPFILE_BY_SIZE)
+
+#define MAKE_SWAPFILE_BLKS(swapfile, blocks, safe) \
+    make_swapfile(swapfile, blocks, safe, SWAPFILE_BY_BLKS)
 
 /*
  * Check swapon/swapoff support status of filesystems or files
diff --git a/libs/libltpswap/libswap.c b/libs/libltpswap/libswap.c
index a26ea25e4..0e2476ec2 100644
--- a/libs/libltpswap/libswap.c
+++ b/libs/libltpswap/libswap.c
@@ -133,18 +133,26 @@ out:
 	return contiguous;
 }
 
-int make_swapfile(const char *swapfile, int blocks, int safe)
+int make_swapfile(const char *swapfile, unsigned int num, int safe, enum swapfile_method method)
 {
 	struct statvfs fs_info;
 	unsigned long blk_size, bs;
 	size_t pg_size = sysconf(_SC_PAGESIZE);
 	char mnt_path[100];
+	unsigned int blocks = 0;
 
 	if (statvfs(".", &fs_info) == -1)
 		return -1;
 
 	blk_size = fs_info.f_bsize;
 
+	if (method == SWAPFILE_BY_SIZE)
+		blocks = num * 1024 * 1024 / blk_size;
+	else if (method == SWAPFILE_BY_BLKS)
+		blocks = num;
+	else
+		tst_brk(TBROK, "Invalid method, please see include/libswap.h");
+
 	/* To guarantee at least one page can be swapped out */
 	if (blk_size * blocks < pg_size)
 		bs = pg_size;
@@ -175,13 +183,13 @@ int make_swapfile(const char *swapfile, int blocks, int safe)
 	argv[2] = NULL;
 
 	return tst_cmd(argv, "/dev/null", "/dev/null", safe ?
-				   TST_CMD_PASS_RETVAL | TST_CMD_TCONF_ON_MISSING : 0);
+			TST_CMD_PASS_RETVAL | TST_CMD_TCONF_ON_MISSING : 0);
 }
 
 bool is_swap_supported(const char *filename)
 {
 	int i, sw_support = 0;
-	int ret = make_swapfile(filename, 10, 1);
+	int ret = MAKE_SWAPFILE_BLKS(filename, 10, 1);
 	int fi_contiguous = file_is_contiguous(filename);
 	long fs_type = tst_fs_type(filename);
 	const char *fstype = tst_fs_type_name(fs_type);
diff --git a/testcases/kernel/syscalls/swapoff/swapoff01.c b/testcases/kernel/syscalls/swapoff/swapoff01.c
index 2a0b683c1..d0d7c3c1f 100644
--- a/testcases/kernel/syscalls/swapoff/swapoff01.c
+++ b/testcases/kernel/syscalls/swapoff/swapoff01.c
@@ -44,7 +44,7 @@ static void setup(void)
 {
 	is_swap_supported(TEST_FILE);
 
-	if (make_swapfile(SWAP_FILE, 65536, 1))
+	if (MAKE_SWAPFILE_BLKS(SWAP_FILE, 65536, 1))
 		tst_brk(TBROK, "Failed to create file for swap");
 }
 
diff --git a/testcases/kernel/syscalls/swapoff/swapoff02.c b/testcases/kernel/syscalls/swapoff/swapoff02.c
index 52906848f..b57290386 100644
--- a/testcases/kernel/syscalls/swapoff/swapoff02.c
+++ b/testcases/kernel/syscalls/swapoff/swapoff02.c
@@ -88,7 +88,7 @@ static void setup(void)
 
 	is_swap_supported(TEST_FILE);
 
-	if (make_swapfile(SWAP_FILE, 10, 1))
+	if (MAKE_SWAPFILE_BLKS(SWAP_FILE, 10, 1))
 		tst_brk(TBROK, "Failed to create file for swap");
 }
 
diff --git a/testcases/kernel/syscalls/swapon/swapon01.c b/testcases/kernel/syscalls/swapon/swapon01.c
index d406e4bd9..2e399db61 100644
--- a/testcases/kernel/syscalls/swapon/swapon01.c
+++ b/testcases/kernel/syscalls/swapon/swapon01.c
@@ -38,7 +38,7 @@ static void verify_swapon(void)
 static void setup(void)
 {
 	is_swap_supported(SWAP_FILE);
-	make_swapfile(SWAP_FILE, 10, 0);
+	MAKE_SWAPFILE_BLKS(SWAP_FILE, 10, 0);
 
 	SAFE_CG_PRINTF(tst_cg, "cgroup.procs", "%d", getpid());
 	SAFE_CG_PRINTF(tst_cg, "memory.max", "%lu", TESTMEM);
diff --git a/testcases/kernel/syscalls/swapon/swapon02.c b/testcases/kernel/syscalls/swapon/swapon02.c
index 7e876d26a..f76bb28cf 100644
--- a/testcases/kernel/syscalls/swapon/swapon02.c
+++ b/testcases/kernel/syscalls/swapon/swapon02.c
@@ -50,8 +50,8 @@ static void setup(void)
 	is_swap_supported(TEST_FILE);
 
 	SAFE_TOUCH(NOTSWAP_FILE, 0777, NULL);
-	make_swapfile(SWAP_FILE, 10, 0);
-	make_swapfile(USED_FILE, 10, 0);
+	MAKE_SWAPFILE_BLKS(SWAP_FILE, 10, 0);
+	MAKE_SWAPFILE_BLKS(USED_FILE, 10, 0);
 
 	if (tst_syscall(__NR_swapon, USED_FILE, 0))
 		tst_res(TWARN | TERRNO, "swapon(alreadyused) failed");
diff --git a/testcases/kernel/syscalls/swapon/swapon03.c b/testcases/kernel/syscalls/swapon/swapon03.c
index 6f47fc01f..aaaedfa11 100644
--- a/testcases/kernel/syscalls/swapon/swapon03.c
+++ b/testcases/kernel/syscalls/swapon/swapon03.c
@@ -49,7 +49,7 @@ static int setup_swap(void)
 
 			/* Create the swapfile */
 			snprintf(filename, sizeof(filename), "%s%02d", TEST_FILE, j + 2);
-			make_swapfile(filename, 10, 0);
+			MAKE_SWAPFILE_BLKS(filename, 10, 0);
 
 			/* turn on the swap file */
 			TST_EXP_PASS_SILENT(swapon(filename, 0));
@@ -62,7 +62,7 @@ static int setup_swap(void)
 		tst_brk(TFAIL, "Failed to setup swap files");
 
 	tst_res(TINFO, "Successfully created %d swap files", swapfiles);
-	make_swapfile(TEST_FILE, 10, 0);
+	MAKE_SWAPFILE_BLKS(TEST_FILE, 10, 0);
 
 	return 0;
 }
