From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755450AbbIXOvg (ORCPT ); Thu, 24 Sep 2015 10:51:36 -0400 Received: from mga02.intel.com ([134.134.136.20]:12335 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754789AbbIXOvb (ORCPT ); Thu, 24 Sep 2015 10:51:31 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,581,1437462000"; d="scan'208";a="567712739" From: "Kirill A. Shutemov" To: Andrew Morton Cc: Andrea Arcangeli , Hugh Dickins , Dave Hansen , Mel Gorman , Rik van Riel , Vlastimil Babka , Christoph Lameter , Naoya Horiguchi , Steve Capper , "Aneesh Kumar K.V" , Johannes Weiner , Michal Hocko , Jerome Marchand , Sasha Levin , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" Subject: [PATCH 06/16] page-flags: define behavior of LRU-related flags on compound pages Date: Thu, 24 Sep 2015 17:50:54 +0300 Message-Id: <1443106264-78075-7-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.5.1 In-Reply-To: <1443106264-78075-1-git-send-email-kirill.shutemov@linux.intel.com> References: <20150921153509.fef7ecdf313ef74307c43b65@linux-foundation.org> <1443106264-78075-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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