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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [PATCHv4 15/24] mm, thp: remove infrastructure for handling splitting PMDs
In-Reply-To: <1425486792-93161-16-git-send-email-kirill.shutemov@linux.intel.com>
References: <1425486792-93161-1-git-send-email-kirill.shutemov@linux.intel.com> <1425486792-93161-16-git-send-email-kirill.shutemov@linux.intel.com>
Date: Sun, 29 Mar 2015 21:40:07 +0530
Message-ID: <87bnjbn5sw.fsf@linux.vnet.ibm.com>
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To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, Andrew Morton <akpm@linux-foundation.org>, Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>, Hugh Dickins <hughd@google.com>, Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>, Vlastimil Babka <vbabka@suse.cz>, Christoph Lameter <cl@gentwo.org>, Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>, Steve Capper <steve.capper@linaro.org>, Johannes Weiner <hannes@cmpxchg.org>, Michal Hocko <mhocko@suse.cz>, Jerome Marchand <jmarchan@redhat.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org

"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

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