Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759304Ab0KPDtt (ORCPT ); Mon, 15 Nov 2010 22:49:49 -0500 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:40097 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756134Ab0KPDts (ORCPT ); Mon, 15 Nov 2010 22:49:48 -0500 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 Date: Tue, 16 Nov 2010 12:44:14 +0900 From: KAMEZAWA Hiroyuki To: Johannes Weiner Cc: Greg Thelen , Minchan Kim , Andrew Morton , Dave Young , Andrea Righi , Daisuke Nishimura , Balbir Singh , Wu Fengguang , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [patch 4/4] memcg: use native word page statistics counters Message-Id: <20101116124414.98167f7c.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20101107220353.964566018@cmpxchg.org> References: <20101107215030.007259800@cmpxchg.org> <20101107220353.964566018@cmpxchg.org> Organization: FUJITSU Co. LTD. X-Mailer: Sylpheed 3.0.3 (GTK+ 2.10.14; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 715 Lines: 19 On Sun, 7 Nov 2010 23:14:39 +0100 Johannes Weiner wrote: > The statistic counters are in units of pages, there is no reason to > make them 64-bit wide on 32-bit machines. > > Make them native words. Since they are signed, this leaves 31 bit on > 32-bit machines, which can represent roughly 8TB assuming a page size > of 4k. > > Signed-off-by: Johannes Weiner Acked-by: KAMEZAWA Hiroyuki -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/