From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757108AbXI1Ogq (ORCPT ); Fri, 28 Sep 2007 10:36:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756865AbXI1Ogi (ORCPT ); Fri, 28 Sep 2007 10:36:38 -0400 Received: from pfx2.jmh.fr ([194.153.89.55]:35259 "EHLO pfx2.jmh.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756515AbXI1Ogh convert rfc822-to-8bit (ORCPT ); Fri, 28 Sep 2007 10:36:37 -0400 Date: Fri, 28 Sep 2007 16:36:34 +0200 From: Eric Dumazet To: Rik van Riel Cc: "linux-os (Dick Johnson)" , Daniel =?ISO-8859-1?B?U3Dlbmc=?= , Subject: Re: Out of memory management in embedded systems Message-Id: <20070928163634.d7fc8909.dada1@cosmosbay.com> In-Reply-To: <20070928101711.504eb198@bree.surriel.com> References: <20070928101711.504eb198@bree.surriel.com> X-Mailer: Sylpheed 2.4.5 (GTK+ 2.12.0; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 28 Sep 2007 10:17:11 -0400 Rik van Riel wrote: > On Fri, 28 Sep 2007 10:04:23 -0400 > "linux-os \(Dick Johnson\)" wrote: > > On Fri, 28 Sep 2007, [iso-8859-1] Daniel Spång wrote: > > > > > On 9/28/07, linux-os (Dick Johnson) wrote: > > >> > > >> On Fri, 28 Sep 2007, [iso-8859-1] Daniel Spång wrote: > > > >>> Some kind of notification to the application that the available memory > > >>> is scarce and let the application free up some memory (e.g., by > > >>> flushing caches), could be used to improve the situation > > > Any networked appliance can (will) throw data away if there are > > no resources available. > > That is exactly what Daniel proposed in his first email. > > I think his idea makes sense. IBM AIX uses SIGDANGER, that kernel can raise in OOM conditions to warn processes that are willing to handle this signal (default action for the SIGDANGER signal is to ignore the signal)