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From:   Zi Yan <ziy@nvidia.com>
To:     Ralph Campbell <rcampbell@nvidia.com>
CC:     <linux-mm@kvack.org>, Matthew Wilcox <willy@infradead.org>,
        "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
        Roman Gushchin <guro@fb.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        <linux-kernel@vger.kernel.org>, <linux-kselftest@vger.kernel.org>,
        Yang Shi <shy828301@gmail.com>,
        "Michal Hocko" <mhocko@kernel.org>,
        John Hubbard <jhubbard@nvidia.com>,
        David Nellans <dnellans@nvidia.com>
Subject: Re: [RFC PATCH 1/6] mm: huge_memory: add new debugfs interface to
 trigger split huge page on any page range.
Date:   Thu, 12 Nov 2020 17:38:17 -0500
Message-ID: <86C79569-B59D-43AD-84B3-AEE10E46EC9C@nvidia.com>
In-Reply-To: <69294b6a-ecfb-fac0-2725-9ac0b73f43aa@nvidia.com>
References: <20201111204008.21332-1-zi.yan@sent.com>
 <20201111204008.21332-2-zi.yan@sent.com>
 <69294b6a-ecfb-fac0-2725-9ac0b73f43aa@nvidia.com>
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On 12 Nov 2020, at 17:22, Ralph Campbell wrote:

> On 11/11/20 12:40 PM, Zi Yan wrote:
>> From: Zi Yan <ziy@nvidia.com>
>>
>> Huge pages in the process with the given pid and virtual address range=

>> are split. It is used to test split huge page function. In addition,
>> a testing program is added to tools/testing/selftests/vm to utilize th=
e
>> interface by splitting PMD THPs.
>>
>> Signed-off-by: Zi Yan <ziy@nvidia.com>
>> ---
>>   mm/huge_memory.c                              |  98 +++++++++++
>>   mm/internal.h                                 |   1 +
>>   mm/migrate.c                                  |   2 +-
>>   tools/testing/selftests/vm/Makefile           |   1 +
>>   .../selftests/vm/split_huge_page_test.c       | 161 ++++++++++++++++=
++
>>   5 files changed, 262 insertions(+), 1 deletion(-)
>>   create mode 100644 tools/testing/selftests/vm/split_huge_page_test.c=

>
> Don't forget to update ".gitignore" to include "split_huge_page_test".

Sure. Thanks for pointing this out.

=E2=80=94
Best Regards,
Yan Zi

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