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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
	Hugh Dickins <hughd@google.com>,
	Dave Hansen <dave.hansen@intel.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>,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Michal Hocko <mhocko@suse.cz>,
	Jerome Marchand <jmarchan@redhat.com>,
	Sasha Levin <sasha.levin@oracle.com>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCH 06/16] page-flags: define behavior of LRU-related flags on compound pages
Date: Thu, 24 Sep 2015 17:50:54 +0300	[thread overview]
Message-ID: <1443106264-78075-7-git-send-email-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <1443106264-78075-1-git-send-email-kirill.shutemov@linux.intel.com>

Only head pages are ever on LRU. Let's use PF_HEAD policy to avoid any
confusion for all LRU-related flags.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 include/linux/page-flags.h | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 63db7483c264..10b75615ddf2 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -246,13 +246,14 @@ static inline int __TestClearPage##uname(struct page *page) { return 0; }
 
 __PAGEFLAG(Locked, locked, PF_NO_TAIL)
 PAGEFLAG(Error, error, PF_NO_COMPOUND) TESTCLEARFLAG(Error, error, PF_NO_COMPOUND)
-PAGEFLAG(Referenced, referenced, PF_ANY) TESTCLEARFLAG(Referenced, referenced, PF_ANY)
-	__SETPAGEFLAG(Referenced, referenced, PF_ANY)
+PAGEFLAG(Referenced, referenced, PF_HEAD)
+	TESTCLEARFLAG(Referenced, referenced, PF_HEAD)
+	__SETPAGEFLAG(Referenced, referenced, PF_HEAD)
 PAGEFLAG(Dirty, dirty, PF_HEAD) TESTSCFLAG(Dirty, dirty, PF_HEAD)
 	__CLEARPAGEFLAG(Dirty, dirty, PF_HEAD)
-PAGEFLAG(LRU, lru, PF_ANY) __CLEARPAGEFLAG(LRU, lru, PF_ANY)
-PAGEFLAG(Active, active, PF_ANY) __CLEARPAGEFLAG(Active, active, PF_ANY)
-	TESTCLEARFLAG(Active, active, PF_ANY)
+PAGEFLAG(LRU, lru, PF_HEAD) __CLEARPAGEFLAG(LRU, lru, PF_HEAD)
+PAGEFLAG(Active, active, PF_HEAD) __CLEARPAGEFLAG(Active, active, PF_HEAD)
+	TESTCLEARFLAG(Active, active, PF_HEAD)
 __PAGEFLAG(Slab, slab, PF_ANY)
 PAGEFLAG(Checked, checked, PF_NO_COMPOUND)	   /* Used by some filesystems */
 PAGEFLAG(Pinned, pinned, PF_ANY) TESTSCFLAG(Pinned, pinned, PF_ANY)	/* Xen */
@@ -306,9 +307,9 @@ PAGEFLAG(SwapCache, swapcache, PF_ANY)
 PAGEFLAG_FALSE(SwapCache)
 #endif
 
-PAGEFLAG(Unevictable, unevictable, PF_ANY)
-	__CLEARPAGEFLAG(Unevictable, unevictable, PF_ANY)
-	TESTCLEARFLAG(Unevictable, unevictable, PF_ANY)
+PAGEFLAG(Unevictable, unevictable, PF_HEAD)
+	__CLEARPAGEFLAG(Unevictable, unevictable, PF_HEAD)
+	TESTCLEARFLAG(Unevictable, unevictable, PF_HEAD)
 
 #ifdef CONFIG_MMU
 PAGEFLAG(Mlocked, mlocked, PF_ANY) __CLEARPAGEFLAG(Mlocked, mlocked, PF_ANY)
-- 
2.5.1

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  parent reply	other threads:[~2015-09-24 14:51 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20150921153509.fef7ecdf313ef74307c43b65@linux-foundation.org>
2015-09-24 14:50 ` [PATCH 00/16] Refreshed page-flags patchset Kirill A. Shutemov
2015-09-24 14:50   ` [PATCH 01/16] page-flags: trivial cleanup for PageTrans* helpers Kirill A. Shutemov
2015-09-24 15:44     ` Christoph Lameter
2015-09-24 14:50   ` [PATCH 02/16] page-flags: move code around Kirill A. Shutemov
2015-09-24 14:50   ` [PATCH 03/16] page-flags: introduce page flags policies wrt compound pages Kirill A. Shutemov
2015-09-25 12:29     ` Konstantin Khlebnikov
2015-09-25 19:13       ` Kirill A. Shutemov
2015-09-28 10:02         ` Konstantin Khlebnikov
2015-09-28 11:03           ` Kirill A. Shutemov
2015-09-28 11:48             ` Konstantin Khlebnikov
2015-09-28 17:51               ` Kirill A. Shutemov
2015-09-24 14:50   ` [PATCH 04/16] page-flags: define PG_locked behavior on " Kirill A. Shutemov
2015-09-24 16:08     ` Christoph Lameter
2015-09-24 20:26       ` Kirill A. Shutemov
2015-09-24 14:50   ` [PATCH 05/16] page-flags: define behavior of FS/IO-related flags " Kirill A. Shutemov
2015-09-24 14:50   ` Kirill A. Shutemov [this message]
2015-09-24 14:50   ` [PATCH 07/16] page-flags: define behavior SL*B-related " Kirill A. Shutemov
2015-09-24 14:50   ` [PATCH 08/16] page-flags: define behavior of Xen-related " Kirill A. Shutemov
2015-09-24 14:50   ` [PATCH 09/16] page-flags: define PG_reserved behavior " Kirill A. Shutemov
2015-09-24 14:50   ` [PATCH 10/16] page-flags: define PG_swapbacked " Kirill A. Shutemov
2015-09-24 14:50   ` [PATCH 11/16] page-flags: define PG_swapcache " Kirill A. Shutemov
2015-09-24 14:51   ` [PATCH 12/16] page-flags: define PG_mlocked " Kirill A. Shutemov
2016-04-18 19:44     ` Sasha Levin
2016-05-18 14:02       ` Kirill A. Shutemov
2015-09-24 14:51   ` [PATCH 13/16] page-flags: define PG_uncached " Kirill A. Shutemov
2015-09-24 14:51   ` [PATCH 14/16] page-flags: define PG_uptodate " Kirill A. Shutemov
2015-09-24 14:51   ` [PATCH 15/16] page-flags: look at head page if the flag is encoded in page->mapping Kirill A. Shutemov
2015-09-24 14:51   ` [PATCH 16/16] mm: sanitize page->mapping for tail pages Kirill A. Shutemov
2015-09-25  2:20     ` Jerome Glisse
2015-09-24 16:13   ` [PATCH 00/16] Refreshed page-flags patchset Christoph Lameter
2015-09-24 20:25     ` Kirill A. Shutemov
2015-03-19 17:08 [PATCH 00/16] Sanitize usage of ->flags and ->mapping for tail pages Kirill A. Shutemov
2015-03-19 17:08 ` [PATCH 06/16] page-flags: define behavior of LRU-related flags on compound pages Kirill A. Shutemov

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