From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756626AbbCSROQ (ORCPT ); Thu, 19 Mar 2015 13:14:16 -0400 Received: from mga11.intel.com ([192.55.52.93]:58107 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751603AbbCSRKp (ORCPT ); Thu, 19 Mar 2015 13:10:45 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,430,1422950400"; d="scan'208";a="682592854" From: "Kirill A. Shutemov" To: Andrew Morton , Andrea Arcangeli , Hugh Dickins Cc: 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 , 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, 19 Mar 2015 19:08:12 +0200 Message-Id: <1426784902-125149-7-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1426784902-125149-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1426784902-125149-1-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 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 df2493860821..bdb0d0e226c4 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -271,13 +271,14 @@ static inline struct page *compound_head_fast(struct page *page) __PAGEFLAG(Locked, locked, NO_TAIL) PAGEFLAG(Error, error, NO_COMPOUND) TESTCLEARFLAG(Error, error, NO_COMPOUND) -PAGEFLAG(Referenced, referenced, ANY) TESTCLEARFLAG(Referenced, referenced, ANY) - __SETPAGEFLAG(Referenced, referenced, ANY) +PAGEFLAG(Referenced, referenced, HEAD) + TESTCLEARFLAG(Referenced, referenced, HEAD) + __SETPAGEFLAG(Referenced, referenced, HEAD) PAGEFLAG(Dirty, dirty, HEAD) TESTSCFLAG(Dirty, dirty, HEAD) __CLEARPAGEFLAG(Dirty, dirty, HEAD) -PAGEFLAG(LRU, lru, ANY) __CLEARPAGEFLAG(LRU, lru, ANY) -PAGEFLAG(Active, active, ANY) __CLEARPAGEFLAG(Active, active, ANY) - TESTCLEARFLAG(Active, active, ANY) +PAGEFLAG(LRU, lru, HEAD) __CLEARPAGEFLAG(LRU, lru, HEAD) +PAGEFLAG(Active, active, HEAD) __CLEARPAGEFLAG(Active, active, HEAD) + TESTCLEARFLAG(Active, active, HEAD) __PAGEFLAG(Slab, slab, ANY) PAGEFLAG(Checked, checked, NO_COMPOUND) /* Used by some filesystems */ PAGEFLAG(Pinned, pinned, ANY) TESTSCFLAG(Pinned, pinned, ANY) /* Xen */ @@ -331,9 +332,9 @@ PAGEFLAG(SwapCache, swapcache, ANY) PAGEFLAG_FALSE(SwapCache) #endif -PAGEFLAG(Unevictable, unevictable, ANY) - __CLEARPAGEFLAG(Unevictable, unevictable, ANY) - TESTCLEARFLAG(Unevictable, unevictable, ANY) +PAGEFLAG(Unevictable, unevictable, HEAD) + __CLEARPAGEFLAG(Unevictable, unevictable, HEAD) + TESTCLEARFLAG(Unevictable, unevictable, HEAD) #ifdef CONFIG_MMU PAGEFLAG(Mlocked, mlocked, ANY) __CLEARPAGEFLAG(Mlocked, mlocked, ANY) -- 2.1.4