Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754779Ab1BQG3J (ORCPT ); Thu, 17 Feb 2011 01:29:09 -0500 Received: from e28smtp03.in.ibm.com ([122.248.162.3]:45279 "EHLO e28smtp03.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751245Ab1BQG3H (ORCPT ); Thu, 17 Feb 2011 01:29:07 -0500 Date: Thu, 17 Feb 2011 11:58:59 +0530 From: Balbir Singh To: Greg Thelen Cc: Andrew Morton , Johannes Weiner , KAMEZAWA Hiroyuki , Daisuke Nishimura , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 2/2] memcg: use native word page statistics counters Message-ID: <20110217062859.GH3415@balbir.in.ibm.com> Reply-To: balbir@linux.vnet.ibm.com References: <1297920842-17299-1-git-send-email-gthelen@google.com> <1297920842-17299-3-git-send-email-gthelen@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <1297920842-17299-3-git-send-email-gthelen@google.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 812 Lines: 26 * Greg Thelen [2011-02-16 21:34:02]: > From: Johannes Weiner > > 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 > Signed-off-by: Greg Thelen Acked-by: Balbir Singh -- Three Cheers, Balbir -- 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/