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Subject: Re: [PATCH v10 7/8] hugetlb_cgroup: Add hugetlb_cgroup reservation
 tests
To:     David Rientjes <rientjes@google.com>
Cc:     Mina Almasry <almasrymina@google.com>, mike.kravetz@oracle.com,
        shakeelb@google.com, shuah@kernel.org, gthelen@google.com,
        akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, linux-kselftest@vger.kernel.org,
        cgroups@vger.kernel.org, aneesh.kumar@linux.vnet.ibm.com
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 <alpine.DEB.2.21.2001291257510.175731@chino.kir.corp.google.com>
From:   Sandipan Das <sandipan@linux.ibm.com>
Date:   Thu, 30 Jan 2020 11:41:15 +0530
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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