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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Andrew Morton <akpm@linux-foundation.org>,
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Cc: Dave Hansen <dave.hansen@intel.com>, Hugh Dickins <hughd@google.com>,
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        Jerome Marchand <jmarchan@redhat.com>, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: [PATCHv4 15/24] mm, thp: remove infrastructure for handling splitting PMDs
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"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> writes:

> With new refcounting we don't need to mark PMDs splitting. Let's drop code
> to handle this.
>
> Arch-specific code will removed separately.
>

Can you explain this more ? Why we don't care of PMD splitting case even
w.r.t to split_huge_page() ? 

-aneesh