From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758834AbYAKEgy (ORCPT ); Thu, 10 Jan 2008 23:36:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756667AbYAKEgr (ORCPT ); Thu, 10 Jan 2008 23:36:47 -0500 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:38067 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755025AbYAKEgq (ORCPT ); Thu, 10 Jan 2008 23:36:46 -0500 Date: Fri, 11 Jan 2008 13:36:03 +0900 From: KOSAKI Motohiro To: Rik van Riel Subject: Re: [patch 10/19] No Reclaim LRU Infrastructure Cc: kosaki.motohiro@jp.fujitsu.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Lee Schermerhorn In-Reply-To: <20080108210008.383114457@redhat.com> References: <20080108205939.323955454@redhat.com> <20080108210008.383114457@redhat.com> Message-Id: <20080111133048.FD5C.KOSAKI.MOTOHIRO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.42 [ja] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rik > +config NORECLAIM > + bool "Track non-reclaimable pages (EXPERIMENTAL; 64BIT only)" > + depends on EXPERIMENTAL && 64BIT > + help > + Supports tracking of non-reclaimable pages off the [in]active lists > + to avoid excessive reclaim overhead on large memory systems. Pages > + may be non-reclaimable because: they are locked into memory, they > + are anonymous pages for which no swap space exists, or they are anon > + pages that are expensive to unmap [long anon_vma "related vma" list.] Why do you select to default is NO ? I think this is really improvement and no one of 64bit user hope turn off without NORECLAIM developer :) - kosaki