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 ESMTP id 33EBA6B00A5 for ; Mon, 8 Nov 2010 18:20:55 -0500 (EST) From: Greg Thelen Subject: Re: [patch 3/4] memcg: break out event counters from other stats References: <1288973333-7891-1-git-send-email-minchan.kim@gmail.com> <20101106010357.GD23393@cmpxchg.org> <20101107215030.007259800@cmpxchg.org> <20101107220353.684449249@cmpxchg.org> Date: Mon, 08 Nov 2010 15:20:38 -0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org To: Minchan Kim Cc: Johannes Weiner , Andrew Morton , Dave Young , Andrea Righi , KAMEZAWA Hiroyuki , Daisuke Nishimura , Balbir Singh , Wu Fengguang , linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: Minchan Kim writes: > On Mon, Nov 8, 2010 at 7:14 AM, Johannes Weiner wrot= e: >> For increasing and decreasing per-cpu cgroup usage counters it makes >> sense to use signed types, as single per-cpu values might go negative >> during updates. =C2=A0But this is not the case for only-ever-increasing >> event counters. >> >> All the counters have been signed 64-bit so far, which was enough to >> count events even with the sign bit wasted. >> >> The next patch narrows the usage counters type (on 32-bit CPUs, that >> is), though, so break out the event counters and make them unsigned >> words as they should have been from the start. >> >> Signed-off-by: Johannes Weiner > Reviewed-by: Minchan Kim Reviewed-by: Greg Thelen -- 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 policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org