linux-kernel - Re: [PATCH 0/5] selftests/mm: Implement support for arm64 on va

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Date:   Thu, 23 Mar 2023 14:49:10 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Chaitanya S Prakash <chaitanyas.prakash@....com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 0/5] selftests/mm: Implement support for arm64 on va

On Thu, 23 Mar 2023 16:22:38 +0530 Chaitanya S Prakash <chaitanyas.prakash@....com> wrote:

> The va_128TBswitch selftest is designed and implemented for PowerPC and
> x86 architectures which support a 128TB switch, up to 256TB of virtual
> address space and hugepage sizes of 16MB and 2MB respectively. Arm64
> platforms on the other hand support a 256Tb switch, up to 4PB of virtual
> address space and a default hugepage size of 512MB when 64k pagesize is
> enabled.
> 
> These architectural differences require introducing support for arm64
> platforms, after which a more generic naming convention is suggested.
> The in code comments are amended to provide a more platform independent
> explanation of the working of the code and nr_hugepages are configured
> as required. Finally, the file running the testcase is modified in order
> to prevent skipping of hugetlb testcases of va_high_addr_switch.
> 
> This series has been tested on 6.3.0-rc3 kernel, both on arm64 and x86
> platforms.

Would it make sense to get this series into the ARM tree, so it sees
more testing on ARM?