Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752594Ab3F1Spp (ORCPT ); Fri, 28 Jun 2013 14:45:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:4217 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752548Ab3F1Spo (ORCPT ); Fri, 28 Jun 2013 14:45:44 -0400 Date: Fri, 28 Jun 2013 14:45:07 -0400 From: Luiz Capitulino To: Anton Vorontsov Cc: Andrew Morton , Minchan Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org, mhocko@suse.cz, kmpark@infradead.org, hyunhee.kim@samsung.com Subject: Re: [PATCH v2] vmpressure: implement strict mode Message-ID: <20130628144507.37d28ed9@redhat.com> In-Reply-To: <20130628170917.GA12610@teo> References: <20130626231712.4a7392a7@redhat.com> <20130627150231.2bc00e3efcd426c4beef894c@linux-foundation.org> <20130628000201.GB15637@bbox> <20130627173433.d0fc6ecd.akpm@linux-foundation.org> <20130628005852.GA8093@teo> <20130627181353.3d552e64.akpm@linux-foundation.org> <20130628043411.GA9100@teo> <20130628050712.GA10097@teo> <20130628100027.31504abe@redhat.com> <20130628165722.GA12271@teo> <20130628170917.GA12610@teo> Organization: Red Hat 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: 950 Lines: 24 On Fri, 28 Jun 2013 10:09:17 -0700 Anton Vorontsov wrote: > So, I would now argue that the current scheme is perfectly OK and can do > everything you can do with the "strict" one, I forgot commenting this bit. This is not true, because I don't want a low fd to be notified on critical level. The current interface just can't do that. However, it *is* possible to make non-strict work on strict if we make strict default _and_ make reads on memory.pressure_level return available events. Just do this on app initialization: for each event in memory.pressure_level; do /* register eventfd to be notified on "event" */ done Then eventfd will always be notified, no matter the event. -- 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/