linux-kernel - Re: [PATCHv9 15/36] ksm: prepare to new THP semantics

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Message-ID: <55BB8BCC.9010302@redhat.com>
Date:	Fri, 31 Jul 2015 16:53:00 +0200
From:	Jerome Marchand <jmarchan@...hat.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Hugh Dickins <hughd@...gle.com>
CC:	Dave Hansen <dave.hansen@...el.com>, Mel Gorman <mgorman@...e.de>,
	Rik van Riel <riel@...hat.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Christoph Lameter <cl@...two.org>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Steve Capper <steve.capper@...aro.org>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>,
	Sasha Levin <sasha.levin@...cle.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCHv9 15/36] ksm: prepare to new THP semantics

On 07/20/2015 04:20 PM, Kirill A. Shutemov wrote:
> We don't need special code to stabilize THP. If you've got reference to
> any subpage of THP it will not be split under you.
> 
> New split_huge_page() also accepts tail pages: no need in special code
> to get reference to head page.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Tested-by: Sasha Levin <sasha.levin@...cle.com>
> Tested-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
> Acked-by: Vlastimil Babka <vbabka@...e.cz>

Acked-by: Jerome Marchand <jmarchan@...hat.com>

> ---
>  mm/ksm.c | 57 ++++++++++-----------------------------------------------
>  1 file changed, 10 insertions(+), 47 deletions(-)
> 


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