Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760982AbZANXcv (ORCPT ); Wed, 14 Jan 2009 18:32:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756604AbZANXcm (ORCPT ); Wed, 14 Jan 2009 18:32:42 -0500 Received: from nf-out-0910.google.com ([64.233.182.186]:46026 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757178AbZANXck convert rfc822-to-8bit (ORCPT ); Wed, 14 Jan 2009 18:32:40 -0500 Message-ID: Date: Wed, 14 Jan 2009 15:32:38 -0800 From: "=?ISO-8859-1?Q?Arve_Hj=F8nnev=E5g?=" To: "Greg KH" Subject: Re: lowmemory android driver not needed? Cc: "Alan Cox" , "Pavel Machek" , "Brian Swetland" , arve@google.com, "San Mehat" , "Robert Love" , linux-kernel@vger.kernel.org In-Reply-To: <20090114231739.GB24111@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Content-Disposition: inline References: <20090114010223.GA21380@kroah.com> <20090114021801.GA14759@bulgaria.corp.google.com> <20090114035237.GB16442@kroah.com> <20090114104307.GA20451@elf.ucw.cz> <20090114104834.18387fca@lxorguk.ukuu.org.uk> <20090114231739.GB24111@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1239 Lines: 27 On Wed, Jan 14, 2009 at 3:17 PM, Greg KH wrote: >> We actually use 6 different thresholds for killing processes. I don't >> know what all the classes are, processes with a higher oom_adj value >> can be killed with less impact to the user than processes with a lower >> oom_adj value. The first few classes only affect latency when >> switching apps, but later classes stop non critical background >> services and finally the foreground app. Another reason to not kill >> every process at the same threshold is that memory may not be free >> immediately when the process is killed. > > But the lowmemorykiller android module doesn't have anything to do with > this, right? > It does. We write the thresholds to /sys/module/lowmemorykiller/parameters/adj and /sys/module/lowmemorykiller/parameters/minfree then set the oom_adj value per process. If the standard oom killer can be adjusted in a similar way, then we will not need the lowmemorykiller module. -- Arve Hj?nnev?g -- 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/