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

Mina Almasry
2020-02-03T23:19:07Z

On Wed, Jan 29, 2020 at 10:11 PM Sandipan Das <sandipan@linux.ibm.com> wrote:
>
> Hi David,
>
> On 30/01/20 2:30 am, David Rientjes wrote:
> > On Thu, 23 Jan 2020, Sandipan Das wrote:
> >
> >> 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?
> >>
> >
> > I assume this is only testing failures of the tools/testing/selftests
> > additions that hardcode 2MB paths and not a kernel problem? In other
> > words, you can still boot, reserve, alloc, and free hugetlb pages on ppc
> > after this patchset without using the selftests?
> >
>
> Yes, its just the hardcoded paths. I didn't run into any kernel problems.
>

Sandipan, I updated the tests to not assume 2MB page size, but I'm
having trouble getting a setup with a non-2MB default size to test
with. I'm uploading v11 of the series shortly, please let me know if
the problem persists.

> - Sandipan
>