linux-kernel - Re: [PATCH RFC 1/1] numa: fix /proc/<pid>/numa

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Message-ID: <56B4C1E1.6060408@intel.com>
Date:	Fri, 5 Feb 2016 07:38:09 -0800
From:	Dave Hansen <dave.hansen@...el.com>
To:	Gerald Schaefer <gerald.schaefer@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Konstantin Khlebnikov <koct9i@...il.com>,
	Michal Hocko <mhocko@...e.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Jerome Marchand <jmarchan@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Mel Gorman <mgorman@...e.de>,
	Dan Williams <dan.j.williams@...el.com>,
	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Michael Holzheu <holzheu@...ux.vnet.ibm.com>
Subject: Re: [PATCH RFC 1/1] numa: fix /proc/<pid>/numa_maps for THP

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.