Re: [PATCH v10 7/8] hugetlb_cgroup: Add hugetlb_cgroup reservation tests

Sandipan Das
2020-01-23T09:15:47Z

Hi,

On 15/01/20 6:56 am, Mina Almasry wrote:
> The tests use both shared and private mapped hugetlb memory, and
> monitors the hugetlb usage counter as well as the hugetlb reservation
> counter. They test different configurations such as hugetlb memory usage
> via hugetlbfs, or MAP_HUGETLB, or shmget/shmat, and with and without
> MAP_POPULATE.
>
> Also add test for hugetlb reservation reparenting, since this is
> a subtle issue.
>
> Signed-off-by: Mina Almasry <almasrymina@google.com>
>

For powerpc64, either 16MB/16GB or 2MB/1GB huge pages are supported depending
on the MMU type (Hash or Radix). I was just running these tests on a powerpc64
system with Hash MMU and ran into problems because the tests assume that the
hugepage size is always 2MB. Can you determine the huge page size at runtime?

- Sandipan