The test should be skipped if initial conditions aren't fulfilled in the start instead of failing and outputting non-compliant TAP logs. This kind of failure pollutes the results. The initial conditions are: - The test should only execute if /tmp file can be allocated. - The test should only execute if huge pages are free.
Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com --- Before: TAP version 13 1..4 Bail out! Error opening file : Read-only file system (30) # Planned tests != run tests (4 != 0) # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0
After: TAP version 13 1..0 # SKIP Unable to allocate file: Read-only file system --- tools/testing/selftests/mm/hugetlb_dio.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c index f9ac20c657ec6..60001c142ce99 100644 --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,13 +44,6 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n");
- /* Get the free huge pages before allocation */ - free_hpage_b = get_free_hugepages(); - if (free_hpage_b == 0) { - close(fd); - ksft_exit_skip("No free hugepage, exiting!\n"); - } - /* Allocate a hugetlb page */ orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0); if (orig_buffer == MAP_FAILED) { @@ -94,8 +87,20 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) int main(void) { size_t pagesize = 0; + int fd;
ksft_print_header(); + + /* Open the file to DIO */ + fd = open("/tmp", O_TMPFILE | O_RDWR | O_DIRECT, 0664); + if (fd < 0) + ksft_exit_skip("Unable to allocate file: %s\n", strerror(errno)); + close(fd); + + /* Check if huge pages are free */ + if (!get_free_hugepages()) + ksft_exit_skip("No free hugepage, exiting\n"); + ksft_set_plan(4);
/* Get base page size */
On Fri, 1 Nov 2024 19:15:57 +0500 Muhammad Usama Anjum usama.anjum@collabora.com wrote:
The test should be skipped if initial conditions aren't fulfilled in the start instead of failing and outputting non-compliant TAP logs. This kind of failure pollutes the results. The initial conditions are:
- The test should only execute if /tmp file can be allocated.
- The test should only execute if huge pages are free.
Cc Donet Tom.
I added
Fixes: 3a103b5315b7 ("selftest: mm: Test if hugepage does not get leaked during __bio_release_pages()") Cc: stable@vger.kernel.org
Before: TAP version 13 1..4 Bail out! Error opening file : Read-only file system (30) # Planned tests != run tests (4 != 0) # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0
After: TAP version 13
1..0 # SKIP Unable to allocate file: Read-only file system
And I moved this useful information to the changelog.
On 11/1/24 19:45, Muhammad Usama Anjum wrote:
The test should be skipped if initial conditions aren't fulfilled in the start instead of failing and outputting non-compliant TAP logs. This kind of failure pollutes the results. The initial conditions are:
- The test should only execute if /tmp file can be allocated.
- The test should only execute if huge pages are free.
Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com
Before: TAP version 13 1..4 Bail out! Error opening file : Read-only file system (30) # Planned tests != run tests (4 != 0) # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0
After: TAP version 13
1..0 # SKIP Unable to allocate file: Read-only file system
tools/testing/selftests/mm/hugetlb_dio.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c index f9ac20c657ec6..60001c142ce99 100644 --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,13 +44,6 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n");
- /* Get the free huge pages before allocation */
- free_hpage_b = get_free_hugepages();
Hi Muhammed Usman Anjum
Reading the free pages is required before starting the test. This value will be compared to the free pages after the test. If they are not the same, the test will be considered a failure.
Since reading the free pages before the test was removed,|free_hpage_b| is always 0, causing the test to fail.
./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 1 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 2 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 3 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 4 : Huge pages not freed! # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0 I think below changes are required. --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,6 +44,9 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n"); + /* Get the free huge pages before allocation */ + free_hpage_b = get_free_hugepages(); + /* Allocate a hugetlb page */ orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0); if (orig_buffer == MAP_FAILED) { With this change the tests are passing. ./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 1 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 2 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 3 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 4 : Huge pages freed successfully ! # Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0 Thank
Donet
- if (free_hpage_b == 0) {
close(fd);ksft_exit_skip("No free hugepage, exiting!\n");- }
- /* Allocate a hugetlb page */ orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0); if (orig_buffer == MAP_FAILED) {
@@ -94,8 +87,20 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) int main(void) { size_t pagesize = 0;
- int fd;
ksft_print_header();
- /* Open the file to DIO */
- fd = open("/tmp", O_TMPFILE | O_RDWR | O_DIRECT, 0664);
- if (fd < 0)
ksft_exit_skip("Unable to allocate file: %s\n", strerror(errno));- close(fd);
- /* Check if huge pages are free */
- if (!get_free_hugepages())
ksft_exit_skip("No free hugepage, exiting\n");- ksft_set_plan(4);
/* Get base page size */
On 11/8/24 16:05, Donet Tom wrote:
On 11/1/24 19:45, Muhammad Usama Anjum wrote:
The test should be skipped if initial conditions aren't fulfilled in the start instead of failing and outputting non-compliant TAP logs. This kind of failure pollutes the results. The initial conditions are:
- The test should only execute if /tmp file can be allocated.
- The test should only execute if huge pages are free.
Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com
Before: TAP version 13 1..4 Bail out! Error opening file : Read-only file system (30) # Planned tests != run tests (4 != 0) # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0
After: TAP version 13
1..0 # SKIP Unable to allocate file: Read-only file system
tools/testing/selftests/mm/hugetlb_dio.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c index f9ac20c657ec6..60001c142ce99 100644 --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,13 +44,6 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n"); - /* Get the free huge pages before allocation */ - free_hpage_b = get_free_hugepages();
Hi Muhammed Usman Anjum
Reading the free pages is required before starting the test. This value will be compared to the free pages after the test. If they are not the same, the test will be considered a failure.
Since reading the free pages before the test was removed,|free_hpage_b| is always 0, causing the test to fail.
./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 1 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 2 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 3 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 4 : Huge pages not freed! # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0 I think below changes are required. --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,6 +44,9 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n"); + /* Get the free huge pages before allocation */ + free_hpage_b = get_free_hugepages(); + /* Allocate a hugetlb page */ orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0); if (orig_buffer == MAP_FAILED) { With this change the tests are passing. ./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 1 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 2 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 3 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 4 : Huge pages freed successfully ! # Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0 Thank
Donet
Sorry. Please ignore above mail.
Reading the free pages is required before starting the test. This value will be compared to the free pages after the test. If they are not the same, the test will be considered a failure.
Since reading the free pages before the test was removed,free_hpage_b is always 0, causing the test to fail.
./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 1 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 2 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 3 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 4 : Huge pages not freed! # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0
I think below changes are required.
iff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c index 60001c142ce9..4b52106b8124 100644 --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,6 +44,9 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n");
+ /* Get the free huge pages before allocation */ + free_hpage_b = get_free_hugepages(); + /* Allocate a hugetlb page */
orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0);
if (orig_buffer == MAP_FAILED) {
With this change the tests are passing.
./tools/testing/selftests/mm/hugetlb_dio
TAP version 131..4 # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 1 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 2 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 3 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 4 : Huge pages freed successfully ! # Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0
Thanks Donet
- if (free_hpage_b == 0) { - close(fd); - ksft_exit_skip("No free hugepage, exiting!\n"); - }
/* Allocate a hugetlb page */ orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0); if (orig_buffer == MAP_FAILED) { @@ -94,8 +87,20 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) int main(void) { size_t pagesize = 0; + int fd; ksft_print_header();
+ /* Open the file to DIO */ + fd = open("/tmp", O_TMPFILE | O_RDWR | O_DIRECT, 0664); + if (fd < 0) + ksft_exit_skip("Unable to allocate file: %s\n", strerror(errno)); + close(fd);
+ /* Check if huge pages are free */ + if (!get_free_hugepages()) + ksft_exit_skip("No free hugepage, exiting\n");
ksft_set_plan(4); /* Get base page size */
On 11/8/24 3:49 PM, Donet Tom wrote:
I think below changes are required.
iff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c index 60001c142ce9..4b52106b8124 100644 --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,6 +44,9 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n"); + /* Get the free huge pages before allocation */ + free_hpage_b = get_free_hugepages();
/* Allocate a hugetlb page */
orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0);
if (orig_buffer == MAP_FAILED) {
Please can you send a fixup patch as you have working test setup? Otherwise I'll take it up and try to test on working setup before posting the fixup patch. Please let me know.
With this change the tests are passing.
./tools/testing/selftests/mm/hugetlb_dio
TAP version 131..4 # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 1 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 2 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 3 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 4 : Huge pages freed successfully ! # Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0
Thanks Donet
On Fri, 8 Nov 2024 19:13:04 +0500 Muhammad Usama Anjum Usama.Anjum@collabora.com wrote:
On 11/8/24 3:49 PM, Donet Tom wrote:
I think below changes are required.
iff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c index 60001c142ce9..4b52106b8124 100644 --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,6 +44,9 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n"); + /* Get the free huge pages before allocation */ + free_hpage_b = get_free_hugepages();
/* Allocate a hugetlb page */
orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0);
if (orig_buffer == MAP_FAILED) {
Please can you send a fixup patch as you have working test setup? Otherwise I'll take it up and try to test on working setup before posting the fixup patch. Please let me know.
I've removed this patch from mm-hotfixes-stable.
On Sat, 9 Nov 2024 22:20:01 -0800 Andrew Morton akpm@linux-foundation.org wrote:
On Fri, 8 Nov 2024 19:13:04 +0500 Muhammad Usama Anjum Usama.Anjum@collabora.com wrote:
On 11/8/24 3:49 PM, Donet Tom wrote:
I think below changes are required.
iff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c index 60001c142ce9..4b52106b8124 100644 --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,6 +44,9 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n"); + /* Get the free huge pages before allocation */ + free_hpage_b = get_free_hugepages();
/* Allocate a hugetlb page */
orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0);
if (orig_buffer == MAP_FAILED) {
Please can you send a fixup patch as you have working test setup? Otherwise I'll take it up and try to test on working setup before posting the fixup patch. Please let me know.
I've removed this patch from mm-hotfixes-stable.
I changed my mind. Please send any fixup against the previous patch.
This test verifies that a hugepage, used as a user buffer for DIO operations, is correctly freed upon unmapping. To test this, we read the count of free hugepages before and after the mmap, DIO, and munmap operations, then check if the free hugepage count is the same.
Reading free hugepages before the test was removed by commit 0268d4579901 ('selftests: hugetlb_dio: check for initial conditions to skip at the start'), causing the test to always fail.
This patch adds back reading the free hugepages before starting the test. With this patch, the tests are now passing.
Test Results without this patch
./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 1 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 2 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 3 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 4 : Huge pages not freed! # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0
Test results with this patch.
./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 1 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 2 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 3 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 4 : Huge pages not freed! # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0
Fixes: 0268d4579901 ("selftests: hugetlb_dio: check for initial conditions to skip in the start") Signed-off-by: Donet Tom donettom@linux.ibm.com --- tools/testing/selftests/mm/hugetlb_dio.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c index 60001c142ce9..432d5af15e66 100644 --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,6 +44,13 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n");
+ /* Get the free huge pages before allocation */ + free_hpage_b = get_free_hugepages(); + if (free_hpage_b == 0) { + close(fd); + ksft_exit_skip("No free hugepage, exiting!\n"); + } + /* Allocate a hugetlb page */ orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0); if (orig_buffer == MAP_FAILED) {
On 11/10/24 12:19, Donet Tom wrote:
This test verifies that a hugepage, used as a user buffer for DIO operations, is correctly freed upon unmapping. To test this, we read the count of free hugepages before and after the mmap, DIO, and munmap operations, then check if the free hugepage count is the same.
Reading free hugepages before the test was removed by commit 0268d4579901 ('selftests: hugetlb_dio: check for initial conditions to skip at the start'), causing the test to always fail.
This patch adds back reading the free hugepages before starting the test. With this patch, the tests are now passing.
Test Results without this patch
./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 1 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 2 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 3 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 4 : Huge pages not freed! # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0
Test results with this patch.
./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 1 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 2 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 3 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 4 : Huge pages not freed! # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0
Fixes: 0268d4579901 ("selftests: hugetlb_dio: check for initial conditions to skip in the start") Signed-off-by: Donet Tom donettom@linux.ibm.com
tools/testing/selftests/mm/hugetlb_dio.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c index 60001c142ce9..432d5af15e66 100644 --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,6 +44,13 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n");
- /* Get the free huge pages before allocation */
- free_hpage_b = get_free_hugepages();
- if (free_hpage_b == 0) {
close(fd);ksft_exit_skip("No free hugepage, exiting!\n");- }
- /* Allocate a hugetlb page */ orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0); if (orig_buffer == MAP_FAILED) {
Hi Andrew Would you prefer I send this fixup patch as a new series, or is it okay as is?
Thanks Donet
On Sun, 10 Nov 2024 12:22:12 +0530 Donet Tom donettom@linux.ibm.com wrote:
Fixes: 0268d4579901 ("selftests: hugetlb_dio: check for initial conditions to skip in the start")
...
Would you prefer I send this fixup patch as a new series, or is it okay as is?
All looks good, thanks. I added cc:stable, because 0268d4579901 was cc:stable.
On 11/10/24 12:19, Donet Tom wrote:
This test verifies that a hugepage, used as a user buffer for DIO operations, is correctly freed upon unmapping. To test this, we read the count of free hugepages before and after the mmap, DIO, and munmap operations, then check if the free hugepage count is the same.
Reading free hugepages before the test was removed by commit 0268d4579901 ('selftests: hugetlb_dio: check for initial conditions to skip at the start'), causing the test to always fail.
This patch adds back reading the free hugepages before starting the test. With this patch, the tests are now passing.
Test Results without this patch
./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 1 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 2 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 3 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 4 : Huge pages not freed! # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0
Test results with this patch.
Sorry the test results with this patch is below.
Test results With this patch
/tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 1 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 2 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 3 : Huge pages freed successfully ! # No. Free pages before allocation : 100 # No. Free pages after munmap : 100 ok 4 : Huge pages freed successfully !
# Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0
Thank
Donet
./tools/testing/selftests/mm/hugetlb_dio TAP version 13 1..4 # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 1 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 2 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 3 : Huge pages not freed! # No. Free pages before allocation : 0 # No. Free pages after munmap : 100 not ok 4 : Huge pages not freed! # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0
Fixes: 0268d4579901 ("selftests: hugetlb_dio: check for initial conditions to skip in the start") Signed-off-by: Donet Tom donettom@linux.ibm.com
tools/testing/selftests/mm/hugetlb_dio.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c index 60001c142ce9..432d5af15e66 100644 --- a/tools/testing/selftests/mm/hugetlb_dio.c +++ b/tools/testing/selftests/mm/hugetlb_dio.c @@ -44,6 +44,13 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) if (fd < 0) ksft_exit_fail_perror("Error opening file\n");
- /* Get the free huge pages before allocation */
- free_hpage_b = get_free_hugepages();
- if (free_hpage_b == 0) {
close(fd);ksft_exit_skip("No free hugepage, exiting!\n");- }
- /* Allocate a hugetlb page */ orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0); if (orig_buffer == MAP_FAILED) {
linux-kselftest-mirror@lists.linaro.org
-
Andrew Morton -
Donet Tom -
Muhammad Usama Anjum -
Muhammad Usama Anjum