On Tue, Mar 23, 2021 at 09:52:27PM +0800, Yanan Wang wrote: > If we want to have some tests about transparent hugepages, the system > configured THP hugepage size should better be known by the tests, which > can be used for kinds of alignment or guest memory accessing of vcpus... > So it makes sense to add a helper to get the transparent hugepage size. > > With VM_MEM_SRC_ANONYMOUS_THP specified in vm_userspace_mem_region_add(), > we now stat /sys/kernel/mm/transparent_hugepage to check whether THP is > configured in the host kernel before madvise(). Based on this, we can also > read file /sys/kernel/mm/transparent_hugepage/hpage_pmd_size to get THP > hugepage size. > > Signed-off-by: Yanan Wang <wangyanan55@xxxxxxxxxx> > Reviewed-by: Ben Gardon <bgardon@xxxxxxxxxx> > --- > .../testing/selftests/kvm/include/test_util.h | 2 ++ > tools/testing/selftests/kvm/lib/test_util.c | 29 +++++++++++++++++++ > 2 files changed, 31 insertions(+) Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
