Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751337Ab0HSBCC (ORCPT ); Wed, 18 Aug 2010 21:02:02 -0400 Received: from mail-ww0-f44.google.com ([74.125.82.44]:39403 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751052Ab0HSBB7 convert rfc822-to-8bit (ORCPT ); Wed, 18 Aug 2010 21:01:59 -0400 MIME-Version: 1.0 In-Reply-To: References: <20100818151857.GA6188@barrios-desktop> <20100818172627.7e38969f@varda> Date: Wed, 18 Aug 2010 18:01:58 -0700 Message-ID: Subject: Re: android-kernel memory reclaim x20 boost? From: =?ISO-8859-1?Q?Arve_Hj=F8nnev=E5g?= To: Minchan Kim Cc: =?ISO-8859-1?Q?Alejandro_Riveira_Fern=E1ndez?= , swetland@google.com, linux-kernel , linux-mm@kvack.org, San Mehat Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1608 Lines: 48 On Wed, Aug 18, 2010 at 5:54 PM, Minchan Kim wrote: > On Thu, Aug 19, 2010 at 12:26 AM, Alejandro Riveira Fern?ndez > wrote: >> El Thu, 19 Aug 2010 00:18:57 +0900 >> Minchan Kim escribi?: >> >>> Hello Android forks, >> [ ... ] >>> >>> I saw the advertisement phrase in this[1]. >>> >>> "Kernel Memory Management Boost: Improved memory reclaim by up to 20x, >>> which results in faster app switching and smoother performance >>> on memory-constrained devices." >>> >>> But I can't find any code for it in android kernel git tree. >> >> ?Maybe the enhancements are on the Dalvik VM (shooting in the dark here) > > Thanks. > Android guys! Could you confirm this? > It is more likely referring to this change: Author: San Mehat Date: Wed May 5 11:38:42 2010 -0700 staging: android: lowmemkiller: Substantially reduce overhead during reclaim This patch optimizes lowmemkiller to not do any work when it has an outstanding kill-request. This greatly reduces the pressure on the task_list lock (improving interactivity), as well as improving the vmscan performance when under heavy memory pressure (by up to 20x in tests). Note: For this enhancement to work, you need CONFIG_PROFILING Signed-off-by: San Mehat -- 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/