Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754131AbbKBQNK (ORCPT ); Mon, 2 Nov 2015 11:13:10 -0500 Received: from resqmta-ch2-01v.sys.comcast.net ([69.252.207.33]:38788 "EHLO resqmta-ch2-01v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754008AbbKBQM6 (ORCPT ); Mon, 2 Nov 2015 11:12:58 -0500 Date: Mon, 2 Nov 2015 10:12:56 -0600 (CST) From: Christoph Lameter X-X-Sender: cl@east.gentwo.org To: Tetsuo Handa cc: htejun@gmail.com, akpm@linux-foundation.org, mhocko@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, hannes@cmpxchg.org, mgorman@suse.de Subject: Re: [patch 3/3] vmstat: Create our own workqueue In-Reply-To: <201510311143.BIH87000.tOSVFHOFJMLFOQ@I-love.SAKURA.ne.jp> Message-ID: References: <201510282057.JHI87536.OMOFFFLJOHQtVS@I-love.SAKURA.ne.jp> <20151029022447.GB27115@mtj.duckdns.org> <20151029030822.GD27115@mtj.duckdns.org> <201510311143.BIH87000.tOSVFHOFJMLFOQ@I-love.SAKURA.ne.jp> Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 690 Lines: 15 On Sat, 31 Oct 2015, Tetsuo Handa wrote: > Then, you need to update below description (or drop it) because > patch 3/3 alone will not guarantee that the counters are up to date. The vmstat system does not guarantee that the counters are up to date always. The whole point is the deferral of updates for performance reasons. They are updated *at some point* within stat_interval. That needs to happen and that is what this patchset is fixing. -- 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/