From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752339AbdJLKGC (ORCPT ); Thu, 12 Oct 2017 06:06:02 -0400 Received: from mga01.intel.com ([192.55.52.88]:48451 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750729AbdJLKGB (ORCPT ); Thu, 12 Oct 2017 06:06:01 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.43,365,1503385200"; d="scan'208";a="322405179" From: changbin.du@intel.com To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Changbin Du Subject: [PATCH] mm, swap_state.c: declare a few variables as __read_mostly Date: Thu, 12 Oct 2017 17:59:09 +0800 Message-Id: <1507802349-5554-1-git-send-email-changbin.du@intel.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Changbin Du These global variables are only set during initialization or rarely change, so declare them as __read_mostly. Signed-off-by: Changbin Du --- mm/swap_state.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/mm/swap_state.c b/mm/swap_state.c index ed91091..71e667d 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -35,13 +35,13 @@ static const struct address_space_operations swap_aops = { #endif }; -struct address_space *swapper_spaces[MAX_SWAPFILES]; -static unsigned int nr_swapper_spaces[MAX_SWAPFILES]; -bool swap_vma_readahead = true; +struct address_space *swapper_spaces[MAX_SWAPFILES] __read_mostly; +static unsigned int nr_swapper_spaces[MAX_SWAPFILES] __read_mostly; +bool swap_vma_readahead __read_mostly = true; #define SWAP_RA_MAX_ORDER_DEFAULT 3 -static int swap_ra_max_order = SWAP_RA_MAX_ORDER_DEFAULT; +static int swap_ra_max_order __read_mostly = SWAP_RA_MAX_ORDER_DEFAULT; #define SWAP_RA_WIN_SHIFT (PAGE_SHIFT / 2) #define SWAP_RA_HITS_MASK ((1UL << SWAP_RA_WIN_SHIFT) - 1) -- 2.7.4