From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753740Ab1DZJvm (ORCPT ); Tue, 26 Apr 2011 05:51:42 -0400 Received: from mga09.intel.com ([134.134.136.24]:46561 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753221Ab1DZJvH (ORCPT ); Tue, 26 Apr 2011 05:51:07 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.64,267,1301900400"; d="scan'208";a="634172776" Message-Id: <20110426094352.030753173@intel.com> User-Agent: quilt/0.48-1 Date: Tue, 26 Apr 2011 17:43:52 +0800 From: Wu Fengguang To: Andrew Morton To: Andi Kleen cc: Tim Chen cc: Li Shaohua Cc: Wu Fengguang , LKML cc: Linux Memory Management List Subject: [PATCH 0/3] reduce readahead overheads on tmpfs mmap page faults Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andrew, This kills unnessesary ra->mmap_miss and ra->prev_pos updates on every page fault when the readahead is disabled. They fix the cache line bouncing problem in the mosbench exim benchmark, which does multi-threaded page faults on shared struct file on tmpfs. Thanks, Fengguang From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with SMTP id DB9F69000C3 for ; Tue, 26 Apr 2011 05:51:07 -0400 (EDT) Message-Id: <20110426094352.030753173@intel.com> Date: Tue, 26 Apr 2011 17:43:52 +0800 From: Wu Fengguang Subject: [PATCH 0/3] reduce readahead overheads on tmpfs mmap page faults Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , Andi Kleen Cc: Tim Chen , Li Shaohua , Wu Fengguang , LKML , Linux Memory Management List Andrew, This kills unnessesary ra->mmap_miss and ra->prev_pos updates on every page fault when the readahead is disabled. They fix the cache line bouncing problem in the mosbench exim benchmark, which does multi-threaded page faults on shared struct file on tmpfs. Thanks, Fengguang -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org