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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" A test for /sys/kernel/mm/transparent_hugepage/* files. Signed-off-by: Cyril Hrubis --- runtest/sysfs | 1 + .../kernel/mm/transparent_hugepage/.gitignore | 1 + .../kernel/mm/transparent_hugepage/Makefile | 7 ++ .../mm/transparent_hugepage/sys_thp01.c | 85 +++++++++++++++++++ 4 files changed, 94 insertions(+) create mode 100644 testcases/kernel/sysfs/kernel/mm/transparent_hugepage/.gitignore create mode 100644 testcases/kernel/sysfs/kernel/mm/transparent_hugepage/Makefile create mode 100644 testcases/kernel/sysfs/kernel/mm/transparent_hugepage/sys_thp01.c diff --git a/runtest/sysfs b/runtest/sysfs index 7d59ae701..5eb8f81f8 100644 --- a/runtest/sysfs +++ b/runtest/sysfs @@ -26,3 +26,4 @@ sys_hugepages01 sys_hugepages01 sys_hugepages02 sys_hugepages02 sys_ksm01 sys_ksm01 sys_mm_swap01 sys_mm_swap01 +sys_thp01 sys_thp01 diff --git a/testcases/kernel/sysfs/kernel/mm/transparent_hugepage/.gitignore b/testcases/kernel/sysfs/kernel/mm/transparent_hugepage/.gitignore new file mode 100644 index 000000000..bdb564dfe --- /dev/null +++ b/testcases/kernel/sysfs/kernel/mm/transparent_hugepage/.gitignore @@ -0,0 +1 @@ +/sys_thp01 diff --git a/testcases/kernel/sysfs/kernel/mm/transparent_hugepage/Makefile b/testcases/kernel/sysfs/kernel/mm/transparent_hugepage/Makefile new file mode 100644 index 000000000..781865569 --- /dev/null +++ b/testcases/kernel/sysfs/kernel/mm/transparent_hugepage/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +# Copyright (c) 2026 Cyril Hrubis + +top_srcdir ?= ../../../../../.. + +include $(top_srcdir)/include/mk/testcases.mk +include $(top_srcdir)/include/mk/generic_leaf_target.mk diff --git a/testcases/kernel/sysfs/kernel/mm/transparent_hugepage/sys_thp01.c b/testcases/kernel/sysfs/kernel/mm/transparent_hugepage/sys_thp01.c new file mode 100644 index 000000000..d243f8502 --- /dev/null +++ b/testcases/kernel/sysfs/kernel/mm/transparent_hugepage/sys_thp01.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2026 Cyril Hrubis + */ + +/*\ + * Sanity checks for the Transparent HugePage (THP) attributes exported under + * /sys/kernel/mm/transparent_hugepage/. + * + * The test verifies that: + * + * - enabled is a bracketed-choice file selecting one of always/madvise/never + * - defrag selects one of always/defer/defer+madvise/madvise/never + * - shmem_enabled selects one of always/within_size/advise/never/deny/force + * - use_zero_page is a boolean + * - hpage_pmd_size is a power of two and larger than the base page size + * + * All checks skip gracefully with TCONF when a particular attribute is not + * present, since the set of THP tunables differs between kernel versions. + */ + +#include +#include +#include "tst_test.h" +#include "tst_sysfs_assert.h" +#include "tst_path_defs.h" + +static const char *const enabled_allowed[] = { + "always", "madvise", "never", NULL +}; + +static const char *const defrag_allowed[] = { + "always", "defer", "defer+madvise", "madvise", "never", NULL +}; + +static const char *const shmem_allowed[] = { + "always", "within_size", "advise", "never", "deny", "force", NULL +}; + +static void check_hpage_pmd_size(void) +{ + long size, pagesize; + + if (access(PATH_MM_THP "/hpage_pmd_size", F_OK)) { + tst_res(TCONF, PATH_MM_THP "/hpage_pmd_size does not exist"); + return; + } + + TST_SYSFS_ASSERT_POW2(PATH_MM_THP "/hpage_pmd_size"); + + size = TST_SYSFS_READ_LI(PATH_MM_THP "/hpage_pmd_size"); + pagesize = getpagesize(); + + if (size > pagesize) { + tst_res(TPASS, "hpage_pmd_size (%ld) > page size (%ld)", + size, pagesize); + } else { + tst_res(TFAIL, "hpage_pmd_size (%ld) <= page size (%ld)", + size, pagesize); + } +} + +static void run(void) +{ + char sel[32]; + + TST_SYSFS_ASSERT_CHOICE(enabled_allowed, sel, sizeof(sel), + PATH_MM_THP "/enabled"); + TST_SYSFS_ASSERT_CHOICE(defrag_allowed, sel, sizeof(sel), + PATH_MM_THP "/defrag"); + TST_SYSFS_ASSERT_CHOICE(shmem_allowed, sel, sizeof(sel), + PATH_MM_THP "/shmem_enabled"); + + TST_SYSFS_ASSERT_BOOL(PATH_MM_THP "/use_zero_page"); + + check_hpage_pmd_size(); +} + +static struct tst_test test = { + .test_all = run, + .needs_kconfigs = (const char *const[]){ + "CONFIG_TRANSPARENT_HUGEPAGE=y", + NULL + }, +}; -- 2.54.0 -- Mailing list info: https://lists.linux.it/listinfo/ltp