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Date: Sun, 14 Jan 2024 22:52:16 -0800
From: Jiaqi Yan <jiaqiyan@...gle.com>
To: Muhammad Usama Anjum <usama.anjum@...labora.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, Shuah Khan <shuah@...nel.org>, kernel@...labora.com,
linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/7] selftests/mm: hugetlb-read-hwpoison: conform test
to TAP format output
On Sun, Jan 14, 2024 at 10:32 PM Muhammad Usama Anjum
<usama.anjum@...labora.com> wrote:
>
> On 1/13/24 6:08 AM, Jiaqi Yan wrote:
> > On Thu, Jan 11, 2024 at 11:21 PM Muhammad Usama Anjum
> > <usama.anjum@...labora.com> wrote:
> >>
> >> Conform the layout, informational and status messages to TAP. No
> >> functional change is intended other than the layout of output messages.
> >>
> >> Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
> >> ---
> >> Tested this by reverting the patch a08c7193e4f18dc8508f2d07d0de2c5b94cb39a3
> >> ("mm/filemap: remove hugetlb special casing in filemap.c") as it has
> >> broken the test. The bug report can be found at [1].
> >>
> >> Tested with proposed fix as well [2].
> >>
> >> [1] https://lore.kernel.org/all/079335ab-190f-41f7-b832-6ffe7528fd8b@collabora.com
> >> [2] https://lore.kernel.org/all/a20e7bdb-7344-306d-e8f5-5ee69af7d5ea@oracle.com
> >> ---
> >> .../selftests/mm/hugetlb-read-hwpoison.c | 116 +++++++++---------
> >> 1 file changed, 56 insertions(+), 60 deletions(-)
> >>
> >> diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> >> index ba6cc6f9cabc..193ad7275df5 100644
> >> --- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> >> +++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
> >> @@ -58,8 +58,8 @@ static bool verify_chunk(char *buf, size_t len, char val)
> >>
> >> for (i = 0; i < len; ++i) {
> >> if (buf[i] != val) {
> >> - printf(PREFIX ERROR_PREFIX "check fail: buf[%lu] = %u != %u\n",
> >> - i, buf[i], val);
> >> + ksft_print_msg(PREFIX ERROR_PREFIX "check fail: buf[%lu] = %u != %u\n",
> >> + i, buf[i], val);
> >> return false;
> >> }
> >> }
> >> @@ -75,9 +75,9 @@ static bool seek_read_hugepage_filemap(int fd, size_t len, size_t wr_chunk_size,
> >> ssize_t total_ret_count = 0;
> >> char val = offset / wr_chunk_size + offset % wr_chunk_size;
> >>
> >> - printf(PREFIX PREFIX "init val=%u with offset=0x%lx\n", val, offset);
> >> - printf(PREFIX PREFIX "expect to read 0x%lx bytes of data in total\n",
> >> - expected);
> >> + ksft_print_msg(PREFIX PREFIX "init val=%u with offset=0x%lx\n", val, offset);
> >> + ksft_print_msg(PREFIX PREFIX "expect to read 0x%lx bytes of data in total\n",
> >> + expected);
> >> if (lseek(fd, offset, SEEK_SET) < 0) {
> >> perror(PREFIX ERROR_PREFIX "seek failed");
> >> return false;
> >> @@ -86,7 +86,7 @@ static bool seek_read_hugepage_filemap(int fd, size_t len, size_t wr_chunk_size,
> >> while (offset + total_ret_count < len) {
> >> ret_count = read(fd, buf, wr_chunk_size);
> >> if (ret_count == 0) {
> >> - printf(PREFIX PREFIX "read reach end of the file\n");
> >> + ksft_print_msg(PREFIX PREFIX "read reach end of the file\n");
> >> break;
> >> } else if (ret_count < 0) {
> >> perror(PREFIX ERROR_PREFIX "read failed");
> >> @@ -98,8 +98,8 @@ static bool seek_read_hugepage_filemap(int fd, size_t len, size_t wr_chunk_size,
> >>
> >> total_ret_count += ret_count;
> >> }
> >> - printf(PREFIX PREFIX "actually read 0x%lx bytes of data in total\n",
> >> - total_ret_count);
> >> + ksft_print_msg(PREFIX PREFIX "actually read 0x%lx bytes of data in total\n",
> >> + total_ret_count);
> >>
> >> return total_ret_count == expected;
> >> }
> >> @@ -112,15 +112,15 @@ static bool read_hugepage_filemap(int fd, size_t len,
> >> ssize_t total_ret_count = 0;
> >> char val = 0;
> >>
> >> - printf(PREFIX PREFIX "expect to read 0x%lx bytes of data in total\n",
> >> - expected);
> >> + ksft_print_msg(PREFIX PREFIX "expect to read 0x%lx bytes of data in total\n",
> >> + expected);
> >> while (total_ret_count < len) {
> >> ret_count = read(fd, buf, wr_chunk_size);
> >> if (ret_count == 0) {
> >> - printf(PREFIX PREFIX "read reach end of the file\n");
> >> + ksft_print_msg(PREFIX PREFIX "read reach end of the file\n");
> >> break;
> >> } else if (ret_count < 0) {
> >> - perror(PREFIX ERROR_PREFIX "read failed");
> >> + ksft_print_msg(PREFIX ERROR_PREFIX "read failed");
> >
> > Should we also include strerror(errno) in log msg, like you did below?
> Looks like I missed it. I'll post a v3.
> >
> > Actually, would ksft_perror be a better choice for perror()s?
> It may or may not be. There aren't ksft_*_perror macros for printing the
> logs at this time. I prefer using just whatever macros are available. They
> aren't generic enough. Maybe mm tests use perror whenever error occurs, but
> other tests don't.
can't you use this ksft_perror available today?
https://github.com/torvalds/linux/blob/master/tools/testing/selftests/kselftest.h#L161C25-L172
>
> >
> >>
> >> break;
> >> }
> >> ++val;
> >> @@ -129,8 +129,8 @@ static bool read_hugepage_filemap(int fd, size_t len,
> >>
> >> total_ret_count += ret_count;
> >> }
> >> - printf(PREFIX PREFIX "actually read 0x%lx bytes of data in total\n",
> >> - total_ret_count);
> >> + ksft_print_msg(PREFIX PREFIX "actually read 0x%lx bytes of data in total\n",
> >> + total_ret_count);
> >>
> >> return total_ret_count == expected;
> >> }
> >> @@ -142,14 +142,15 @@ test_hugetlb_read(int fd, size_t len, size_t wr_chunk_size)
> >> char *filemap = NULL;
> >>
> >> if (ftruncate(fd, len) < 0) {
> >> - perror(PREFIX ERROR_PREFIX "ftruncate failed");
> >> + ksft_print_msg(PREFIX ERROR_PREFIX "ftruncate failed: %s\n", strerror(errno));
> >> return status;
> >> }
> >>
> >> filemap = mmap(NULL, len, PROT_READ | PROT_WRITE,
> >> MAP_SHARED | MAP_POPULATE, fd, 0);
> >> if (filemap == MAP_FAILED) {
> >> - perror(PREFIX ERROR_PREFIX "mmap for primary mapping failed");
> >> + ksft_print_msg(PREFIX ERROR_PREFIX "mmap for primary mapping failed: %s\n",
> >> + strerror(errno));
> >> goto done;
> >> }
> >>
> >> @@ -162,7 +163,8 @@ test_hugetlb_read(int fd, size_t len, size_t wr_chunk_size)
> >> munmap(filemap, len);
> >> done:
> >> if (ftruncate(fd, 0) < 0) {
> >> - perror(PREFIX ERROR_PREFIX "ftruncate back to 0 failed");
> >> + ksft_print_msg(PREFIX ERROR_PREFIX "ftruncate back to 0 failed : %s\n",
> >> + strerror(errno));
> >> status = TEST_FAILED;
> >> }
> >>
> >> @@ -179,14 +181,15 @@ test_hugetlb_read_hwpoison(int fd, size_t len, size_t wr_chunk_size,
> >> const unsigned long pagesize = getpagesize();
> >>
> >> if (ftruncate(fd, len) < 0) {
> >> - perror(PREFIX ERROR_PREFIX "ftruncate failed");
> >> + ksft_print_msg(PREFIX ERROR_PREFIX "ftruncate failed: %s\n", strerror(errno));
> >> return status;
> >> }
> >>
> >> filemap = mmap(NULL, len, PROT_READ | PROT_WRITE,
> >> MAP_SHARED | MAP_POPULATE, fd, 0);
> >> if (filemap == MAP_FAILED) {
> >> - perror(PREFIX ERROR_PREFIX "mmap for primary mapping failed");
> >> + ksft_print_msg(PREFIX ERROR_PREFIX "mmap for primary mapping failed: %s\n",
> >> + strerror(errno));
> >> goto done;
> >> }
> >>
> >> @@ -201,7 +204,7 @@ test_hugetlb_read_hwpoison(int fd, size_t len, size_t wr_chunk_size,
> >> */
> >> hwp_addr = filemap + len / 2 + pagesize;
> >> if (madvise(hwp_addr, pagesize, MADV_HWPOISON) < 0) {
> >> - perror(PREFIX ERROR_PREFIX "MADV_HWPOISON failed");
> >> + ksft_print_msg(PREFIX ERROR_PREFIX "MADV_HWPOISON failed: %s\n", strerror(errno));
> >> goto unmap;
> >> }
> >>
> >> @@ -228,7 +231,8 @@ test_hugetlb_read_hwpoison(int fd, size_t len, size_t wr_chunk_size,
> >> munmap(filemap, len);
> >> done:
> >> if (ftruncate(fd, 0) < 0) {
> >> - perror(PREFIX ERROR_PREFIX "ftruncate back to 0 failed");
> >> + ksft_print_msg(PREFIX ERROR_PREFIX "ftruncate back to 0 failed: %s\n",
> >> + strerror(errno));
> >> status = TEST_FAILED;
> >> }
> >>
> >> @@ -240,27 +244,32 @@ static int create_hugetlbfs_file(struct statfs *file_stat)
> >> int fd;
> >>
> >> fd = memfd_create("hugetlb_tmp", MFD_HUGETLB);
> >> - if (fd < 0) {
> >> - perror(PREFIX ERROR_PREFIX "could not open hugetlbfs file");
> >> - return -1;
> >> - }
> >> + if (fd < 0)
> >> + ksft_exit_fail_msg(PREFIX ERROR_PREFIX "could not open hugetlbfs file: %s\n",
> >> + strerror(errno));
> >>
> >> memset(file_stat, 0, sizeof(*file_stat));
> >> +
> >> if (fstatfs(fd, file_stat)) {
> >> - perror(PREFIX ERROR_PREFIX "fstatfs failed");
> >> - goto close;
> >> + close(fd);
> >> + ksft_exit_fail_msg(PREFIX ERROR_PREFIX "fstatfs failed: %s\n", strerror(errno));
> >> }
> >> if (file_stat->f_type != HUGETLBFS_MAGIC) {
> >> - printf(PREFIX ERROR_PREFIX "not hugetlbfs file\n");
> >> - goto close;
> >> + close(fd);
> >> + ksft_exit_fail_msg(PREFIX ERROR_PREFIX "not hugetlbfs file\n");
> >> }
> >>
> >> return fd;
> >> -close:
> >> - close(fd);
> >> - return -1;
> >> }
> >>
> >> +#define KSFT_PRINT_MSG(status, fmt, ...) \
> >> + do { \
> >> + if (status == TEST_SKIPPED) \
> >> + ksft_test_result_skip(fmt, __VA_ARGS__); \
> >> + else \
> >> + ksft_test_result(status == TEST_PASSED, fmt, __VA_ARGS__); \
> >> + } while (0)
> >> +
> >> int main(void)
> >> {
> >> int fd;
> >> @@ -273,50 +282,37 @@ int main(void)
> >> };
> >> size_t i;
> >>
> >> + ksft_print_header();
> >> + ksft_set_plan(12);
> >> +
> >> for (i = 0; i < ARRAY_SIZE(wr_chunk_sizes); ++i) {
> >> - printf("Write/read chunk size=0x%lx\n",
> >> - wr_chunk_sizes[i]);
> >> + ksft_print_msg("Write/read chunk size=0x%lx\n",
> >> + wr_chunk_sizes[i]);
> >>
> >> fd = create_hugetlbfs_file(&file_stat);
> >> - if (fd < 0)
> >> - goto create_failure;
> >> - printf(PREFIX "HugeTLB read regression test...\n");
> >> + ksft_print_msg(PREFIX "HugeTLB read regression test...\n");
> >> status = test_hugetlb_read(fd, file_stat.f_bsize,
> >> wr_chunk_sizes[i]);
> >> - printf(PREFIX "HugeTLB read regression test...%s\n",
> >> - status_to_str(status));
> >> + KSFT_PRINT_MSG(status, PREFIX "HugeTLB read regression test...%s\n",
> >> + status_to_str(status));
> >> close(fd);
> >> - if (status == TEST_FAILED)
> >> - return -1;
> >>
> >> fd = create_hugetlbfs_file(&file_stat);
> >> - if (fd < 0)
> >> - goto create_failure;
> >> - printf(PREFIX "HugeTLB read HWPOISON test...\n");
> >> + ksft_print_msg(PREFIX "HugeTLB read HWPOISON test...\n");
> >> status = test_hugetlb_read_hwpoison(fd, file_stat.f_bsize,
> >> wr_chunk_sizes[i], false);
> >> - printf(PREFIX "HugeTLB read HWPOISON test...%s\n",
> >> - status_to_str(status));
> >> + KSFT_PRINT_MSG(status, PREFIX "HugeTLB read HWPOISON test..%s\n",
> >> + status_to_str(status));
> >> close(fd);
> >> - if (status == TEST_FAILED)
> >> - return -1;
> >>
> >> fd = create_hugetlbfs_file(&file_stat);
> >> - if (fd < 0)
> >> - goto create_failure;
> >> - printf(PREFIX "HugeTLB seek then read HWPOISON test...\n");
> >> + ksft_print_msg(PREFIX "HugeTLB seek then read HWPOISON test...\n");
> >> status = test_hugetlb_read_hwpoison(fd, file_stat.f_bsize,
> >> wr_chunk_sizes[i], true);
> >> - printf(PREFIX "HugeTLB seek then read HWPOISON test...%s\n",
> >> - status_to_str(status));
> >> + KSFT_PRINT_MSG(status, PREFIX "HugeTLB seek then read HWPOISON test...%s\n",
> >> + status_to_str(status));
> >> close(fd);
> >> - if (status == TEST_FAILED)
> >> - return -1;
> >> }
> >>
> >> - return 0;
> >> -
> >> -create_failure:
> >> - printf(ERROR_PREFIX "Abort test: failed to create hugetlbfs file\n");
> >> - return -1;
> >> + ksft_finished();
> >> }
> >> --
> >> 2.42.0
> >>
> >>
> >
>
> --
> BR,
> Muhammad Usama Anjum
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