Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757781Ab2FEH74 (ORCPT ); Tue, 5 Jun 2012 03:59:56 -0400 Received: from LGEMRELSE1Q.lge.com ([156.147.1.111]:49889 "EHLO LGEMRELSE1Q.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756952Ab2FEH7y (ORCPT ); Tue, 5 Jun 2012 03:59:54 -0400 X-AuditID: 9c93016f-b7c3cae000001954-09-4fcdbc787f24 Message-ID: <4FCDBC8E.1000705@kernel.org> Date: Tue, 05 Jun 2012 17:00:14 +0900 From: Minchan Kim User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 Newsgroups: gmane.linux.kernel.mm,gmane.linux.kernel To: Pekka Enberg CC: Anton Vorontsov , KOSAKI Motohiro , Leonid Moiseichuk , John Stultz , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linaro-kernel@lists.linaro.org, patches@linaro.org, kernel-team@android.com Subject: Re: [PATCH 0/5] Some vmevent fixes... References: <20120601122118.GA6128@lizard> <4FCC7592.9030403@kernel.org> <20120604113811.GA4291@lizard> <20120604121722.GA2768@barrios> <20120604133527.GA13650@lizard> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1188 Lines: 34 Hi Peakk, On 06/05/2012 04:53 PM, Pekka Enberg wrote: > On Mon, Jun 4, 2012 at 4:35 PM, Anton Vorontsov wrote: >>> I don't mean VMEVENT_ATTR_LOWMEM_PAGES but following as, >>> >>> VMEVENT_ATTR_NR_FREE_PAGES >>> VMEVENT_ATTR_NR_SWAP_PAGES >>> VMEVENT_ATTR_NR_AVAIL_PAGES >>> >>> I'm not sure how it is useful. >> >> Yep, these raw values are mostly useless, and personally I don't use >> these plain attributes. I use heuristics, i.e. "blended" attributes. >> If we can come up with levels-based approach w/o using vmstat, well.. >> OK then. > > That's what Nokia's lowmem notifier uses. We can probably drop them > once we have something else they could use. Next concern is that periodic timer of implementation. I think it would add direct hook in vmscan.c rather than peeking raw vmstat periodically by timer so we can control more fine-grained way without unnecessary overhead. -- Kind regards, Minchan Kim -- 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/