[RFC PATCH 2/2] selftests: restrictedmem: Add selftest for RMFD_HUGEPAGE
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From: Ackerley Tng <hidden>
Date: 2023-02-18 00:45:12
Also in:
kvm, linux-arch, linux-doc, linux-fsdevel, linux-mm, lkml, qemu-devel
Subsystem:
kernel selftest framework, the rest · Maintainers:
Shuah Khan, Shuah Khan, Linus Torvalds
Tests that when RMFD_HUGEPAGE is specified, restrictedmem will be backed by Transparent HugePages. Signed-off-by: Ackerley Tng <redacted> --- .../restrictedmem_hugepage_test.c | 25 +++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/tools/testing/selftests/restrictedmem/restrictedmem_hugepage_test.c b/tools/testing/selftests/restrictedmem/restrictedmem_hugepage_test.c
index 0d9cf2ced754..75283d68696f 100644
--- a/tools/testing/selftests/restrictedmem/restrictedmem_hugepage_test.c
+++ b/tools/testing/selftests/restrictedmem/restrictedmem_hugepage_test.c@@ -180,6 +180,31 @@ TEST_F(reset_shmem_enabled, restrictedmem_fstat_shmem_enabled_always) close(mfd); } +TEST(restrictedmem_invalid_flags) +{ + int mfd = memfd_restricted(99, NULL); + + ASSERT_EQ(-1, mfd); + ASSERT_EQ(EINVAL, errno); +} + +TEST_F(reset_shmem_enabled, restrictedmem_rmfd_hugepage) +{ + int mfd = -1; + struct stat stat; + + ASSERT_EQ(0, set_shmem_thp_policy("never")); + + mfd = memfd_restricted(RMFD_HUGEPAGE, NULL); + ASSERT_NE(-1, mfd); + + ASSERT_EQ(0, fstat(mfd, &stat)); + + ASSERT_EQ(stat.st_blksize, get_hpage_pmd_size()); + + close(mfd); +} + TEST(restrictedmem_tmpfile_no_mount_path) { int mfd = memfd_restricted(RMFD_TMPFILE, NULL);
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2.39.2.637.g21b0678d19-goog