Add defines for file path names to avoid duplicate strings in print messages and make it easier to maintain.

Signed-off-by: Aryabhatta Dey aryabhattadey35@gmail.com --- tools/testing/selftests/mm/compaction_test.c | 46 ++++++++++---------- 1 file changed, 24 insertions(+), 22 deletions(-)

diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c index e140558e6f53..541ac0373258 100644 --- a/tools/testing/selftests/mm/compaction_test.c +++ b/tools/testing/selftests/mm/compaction_test.c @@ -21,6 +21,9 @@ #define MAP_SIZE_MB 100 #define MAP_SIZE (MAP_SIZE_MB * 1024 * 1024)

+#define COMPACT_UNEVICTABLE_ALLOWED "/proc/sys/vm/compact_unevictable_allowed" +#define NR_HUGEPAGES "/proc/sys/vm/nr_hugepages" + struct map_list { void *map; struct map_list *next; @@ -59,17 +62,16 @@ int prereq(void) char allowed; int fd;

- fd = open("/proc/sys/vm/compact_unevictable_allowed", - O_RDONLY | O_NONBLOCK); + fd = open(COMPACT_UNEVICTABLE_ALLOWED, O_RDONLY | O_NONBLOCK); if (fd < 0) { - ksft_print_msg("Failed to open /proc/sys/vm/compact_unevictable_allowed: %s\n", - strerror(errno)); + ksft_print_msg("Failed to open %s: %s\n", + COMPACT_UNEVICTABLE_ALLOWED, strerror(errno)); return -1; }

if (read(fd, &allowed, sizeof(char)) != sizeof(char)) { - ksft_print_msg("Failed to read from /proc/sys/vm/compact_unevictable_allowed: %s\n", - strerror(errno)); + ksft_print_msg("Failed to read from %s: %s\n", + COMPACT_UNEVICTABLE_ALLOWED, strerror(errno)); close(fd); return -1; } @@ -97,10 +99,10 @@ int check_compaction(unsigned long mem_free, unsigned long hugepage_size, in to play */ mem_free = mem_free * 0.8;

- fd = open("/proc/sys/vm/nr_hugepages", O_RDWR | O_NONBLOCK); + fd = open(NR_HUGEPAGES, O_RDWR | O_NONBLOCK); if (fd < 0) { - ksft_print_msg("Failed to open /proc/sys/vm/nr_hugepages: %s\n", - strerror(errno)); + ksft_print_msg("Failed to open %s: %s\n", + NR_HUGEPAGES, strerror(errno)); ret = -1; goto out; } @@ -108,16 +110,16 @@ int check_compaction(unsigned long mem_free, unsigned long hugepage_size, /* Request a large number of huge pages. The Kernel will allocate as much as it can */ if (write(fd, "100000", (6*sizeof(char))) != (6*sizeof(char))) { - ksft_print_msg("Failed to write 100000 to /proc/sys/vm/nr_hugepages: %s\n", - strerror(errno)); + ksft_print_msg("Failed to write 100000 to %s: %s\n", + NR_HUGEPAGES, strerror(errno)); goto close_fd; }

lseek(fd, 0, SEEK_SET);

if (read(fd, nr_hugepages, sizeof(nr_hugepages)) <= 0) { - ksft_print_msg("Failed to re-read from /proc/sys/vm/nr_hugepages: %s\n", - strerror(errno)); + ksft_print_msg("Failed to re-read from %s: %s\n", + NR_HUGEPAGES, strerror(errno)); goto close_fd; }

@@ -134,8 +136,8 @@ int check_compaction(unsigned long mem_free, unsigned long hugepage_size,

if (write(fd, init_nr_hugepages, strlen(init_nr_hugepages)) != strlen(init_nr_hugepages)) { - ksft_print_msg("Failed to write value to /proc/sys/vm/nr_hugepages: %s\n", - strerror(errno)); + ksft_print_msg("Failed to write value to %s: %s\n", + NR_HUGEPAGES, strerror(errno)); goto close_fd; }

@@ -162,15 +164,15 @@ int set_zero_hugepages(unsigned long *initial_nr_hugepages) int fd, ret = -1; char nr_hugepages[20] = {0};

- fd = open("/proc/sys/vm/nr_hugepages", O_RDWR | O_NONBLOCK); + fd = open(NR_HUGEPAGES, O_RDWR | O_NONBLOCK); if (fd < 0) { - ksft_print_msg("Failed to open /proc/sys/vm/nr_hugepages: %s\n", - strerror(errno)); + ksft_print_msg("Failed to open %s: %s\n", + NR_HUGEPAGES, strerror(errno)); goto out; } if (read(fd, nr_hugepages, sizeof(nr_hugepages)) <= 0) { - ksft_print_msg("Failed to read from /proc/sys/vm/nr_hugepages: %s\n", - strerror(errno)); + ksft_print_msg("Failed to read from %s: %s\n", + NR_HUGEPAGES, strerror(errno)); goto close_fd; }

@@ -178,8 +180,8 @@ int set_zero_hugepages(unsigned long *initial_nr_hugepages)

/* Start with the initial condition of 0 huge pages */ if (write(fd, "0", sizeof(char)) != sizeof(char)) { - ksft_print_msg("Failed to write 0 to /proc/sys/vm/nr_hugepages: %s\n", - strerror(errno)); + ksft_print_msg("Failed to write 0 to %s: %s\n", + NR_HUGEPAGES, strerror(errno)); goto close_fd; }