This case is quit simple by using madvise(MADV_HUGEPAGE), but for verifying the size of THP memory, we need to setup the memcg and attach test process to this memcg before perform the test.
Because mshare doesn't support THP feature, the size of THP memory should be 0 even though we use madivse.
Signed-off-by: Yongting Lin linyongting@bytedance.com --- tools/testing/selftests/mshare/memory.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/tools/testing/selftests/mshare/memory.c b/tools/testing/selftests/mshare/memory.c index 7754c0e33506..2a415ce7bc01 100644 --- a/tools/testing/selftests/mshare/memory.c +++ b/tools/testing/selftests/mshare/memory.c @@ -68,4 +68,15 @@ TEST_F(memory, swap) ASSERT_GT(swap_size, GB(1) * 9 / 10); }
+TEST_F(memory, thp) +{ + ASSERT_NE(madvise(self->addr, self->allocate_size, MADV_HUGEPAGE), -1); + /* touch 1G */ + memset(self->addr, 0x01, GB(1)); + + size_t huge = read_huge_from_cgroup(self->cgroup); + /* mshare don't support THP now */ + ASSERT_EQ(huge, 0); +} + TEST_HARNESS_MAIN