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Subject: Re: [PATCH RFC 1/1] numa: fix /proc/<pid>/numa_maps for THP
To: Gerald Schaefer <gerald.schaefer@de.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>
References: <1454686440-31218-1-git-send-email-gerald.schaefer@de.ibm.com>
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Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
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From: Dave Hansen <dave.hansen@intel.com>
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Date: Fri, 5 Feb 2016 07:38:09 -0800
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On 02/05/2016 07:34 AM, Gerald Schaefer wrote:
> +static struct page *can_gather_numa_stats_pmd(pmd_t pmd,
> +					      struct vm_area_struct *vma,
> +					      unsigned long addr)
> +{

Is there a way to do this without making a copy of most of
can_gather_numa_stats()?  Seems like the kind of thing where the pmd
version will bitrot.