linux-kernel - RE: [PATCH 16/36] mm, thp: remove compound

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Message-Id: <20150714140244.C85BE8B@black.fi.intel.com>
Date:	Tue, 14 Jul 2015 17:02:44 +0300 (EEST)
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Hugh Dickins <hughd@...gle.com>,
	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>,
	Jerome Marchand <jmarchan@...hat.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: RE: [PATCH 16/36] mm, thp: remove compound_lock

Kirill A. Shutemov wrote:
> We are going to use migration entries to stabilize page counts. It means
> we don't need compound_lock() for that.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Tested-by: Sasha Levin <sasha.levin@...cle.com>
> Acked-by: Vlastimil Babka <vbabka@...e.cz>
> ---
>  include/linux/mm.h         | 35 -----------------------------------
>  include/linux/page-flags.h | 12 +-----------
>  mm/debug.c                 |  3 ---
>  mm/memcontrol.c            | 11 +++--------
>  4 files changed, 4 insertions(+), 57 deletions(-)

checkpatch fixlet:

22a36e559f70  mm, thp: remove compound_lock fix
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 74b7cece1dfa..f10f9c0030dd 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -689,7 +689,7 @@ static inline void ClearPageSlabPfmemalloc(struct page *page)
 	 1 << PG_private | 1 << PG_private_2 | \
 	 1 << PG_writeback | 1 << PG_reserved | \
 	 1 << PG_slab	 | 1 << PG_swapcache | 1 << PG_active | \
-	 1 << PG_unevictable | __PG_MLOCKED | __PG_HWPOISON )
+	 1 << PG_unevictable | __PG_MLOCKED | __PG_HWPOISON)
 
 /*
  * Flags checked when a page is prepped for return by the page allocator.
--
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