+ selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available.patch added to mm-unstable branch

+ selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: selftests/mm: split_huge_page_test: skip the test when thp is not available
has been added to the -mm mm-unstable branch.  Its filename is
     selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days

------------------------------------------------------
From: Chunyu Hu <chuhu@redhat.com>
Subject: selftests/mm: split_huge_page_test: skip the test when thp is not available
Date: Mon, 30 Mar 2026 23:15:02 +0800

When thp is not enabled on some kernel config such as realtime kernel, the
test will report failure. Fix the false positive by skipping the test
directly when thp is not enabled.

Tested with thp disabled kernel:
Before The fix:
  # --------------------------------------------------
  # running ./split_huge_page_test /tmp/xfs_dir_Ywup9p
  # --------------------------------------------------
  # TAP version 13
  # Bail out! Reading PMD pagesize failed
  # # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0
  # [FAIL]
  not ok 61 split_huge_page_test /tmp/xfs_dir_Ywup9p # exit=1

After the fix:
  # --------------------------------------------------
  # running ./split_huge_page_test /tmp/xfs_dir_YHPUPl
  # --------------------------------------------------
  # TAP version 13
  # 1..0 # SKIP Transparent Hugepages not available
  # [SKIP]
  ok 6 split_huge_page_test /tmp/xfs_dir_YHPUPl # SKIP

Link: https://lkml.kernel.org/r/20260330151503.670415-7-chuhu@redhat.com
Signed-off-by: Chunyu Hu <chuhu@redhat.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Li Wang <liwang@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/mm/split_huge_page_test.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/tools/testing/selftests/mm/split_huge_page_test.c~selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available
+++ a/tools/testing/selftests/mm/split_huge_page_test.c
@@ -21,6 +21,7 @@
 #include <time.h>
 #include "vm_util.h"
 #include "kselftest.h"
+#include "thp_settings.h"
 
 uint64_t pagesize;
 unsigned int pageshift;
@@ -757,6 +758,9 @@ int main(int argc, char **argv)
 		ksft_finished();
 	}
 
+	if (!thp_is_enabled())
+		ksft_exit_skip("Transparent Hugepages not available\n");
+
 	if (argc > 1)
 		optional_xfs_path = argv[1];
 
_

Patches currently in -mm which might be from chuhu@redhat.com are

selftests-mm-guard-regions-skip-collapse-test-when-thp-not-enabled.patch
selftests-mm-soft-dirty-skip-two-tests-when-thp-is-not-available.patch
selftests-mm-move-write_file-helper-to-vm_util.patch
selftests-ksft_exit_fail_perror-support-printf-style-arguments.patch
selftests-mm-vm_util-robust-write_file.patch
selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available.patch
selftests-mm-transhuge_stress-skip-the-test-when-thp-not-available.patch

+ selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: selftests/mm: split_huge_page_test: skip the test when thp is not available
has been added to the -mm mm-unstable branch.  Its filename is
     selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days

------------------------------------------------------
From: Chunyu Hu <chuhu@redhat.com>
Subject: selftests/mm: split_huge_page_test: skip the test when thp is not available
Date: Thu, 2 Apr 2026 09:45:42 +0800

When thp is not enabled on some kernel config such as realtime kernel, the
test will report failure.  Fix the false positive by skipping the test
directly when thp is not enabled.

Tested with thp disabled kernel:
Before The fix:
  # --------------------------------------------------
  # running ./split_huge_page_test /tmp/xfs_dir_Ywup9p
  # --------------------------------------------------
  # TAP version 13
  # Bail out! Reading PMD pagesize failed
  # # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0
  # [FAIL]
  not ok 61 split_huge_page_test /tmp/xfs_dir_Ywup9p # exit=1

After the fix:
  # --------------------------------------------------
  # running ./split_huge_page_test /tmp/xfs_dir_YHPUPl
  # --------------------------------------------------
  # TAP version 13
  # 1..0 # SKIP Transparent Hugepages not available
  # [SKIP]
  ok 6 split_huge_page_test /tmp/xfs_dir_YHPUPl # SKIP

Link: https://lkml.kernel.org/r/20260402014543.1671131-6-chuhu@redhat.com
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Li Wang <liwang@redhat.com>
Signed-off-by: Chunyu Hu <chuhu@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/mm/split_huge_page_test.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/tools/testing/selftests/mm/split_huge_page_test.c~selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available
+++ a/tools/testing/selftests/mm/split_huge_page_test.c
@@ -21,6 +21,7 @@
 #include <time.h>
 #include "vm_util.h"
 #include "kselftest.h"
+#include "thp_settings.h"
 
 uint64_t pagesize;
 unsigned int pageshift;
@@ -757,6 +758,9 @@ int main(int argc, char **argv)
 		ksft_finished();
 	}
 
+	if (!thp_is_enabled())
+		ksft_exit_skip("Transparent Hugepages not available\n");
+
 	if (argc > 1)
 		optional_xfs_path = argv[1];
 
_

Patches currently in -mm which might be from chuhu@redhat.com are

selftests-mm-guard-regions-skip-collapse-test-when-thp-not-enabled.patch
selftests-mm-soft-dirty-skip-two-tests-when-thp-is-not-available.patch
selftests-mm-move-write_file-helper-to-vm_util.patch
selftests-mm-vm_util-robust-write_file.patch
selftests-mm-split_huge_page_test-skip-the-test-when-thp-is-not-available.patch
selftests-mm-transhuge_stress-skip-the-test-when-thp-not-available.patch