From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965663AbXDMWy3 (ORCPT ); Fri, 13 Apr 2007 18:54:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965672AbXDMWy2 (ORCPT ); Fri, 13 Apr 2007 18:54:28 -0400 Received: from holomorphy.com ([66.93.40.71]:51241 "EHLO holomorphy.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965663AbXDMWy2 (ORCPT ); Fri, 13 Apr 2007 18:54:28 -0400 Date: Fri, 13 Apr 2007 15:54:33 -0700 From: William Lee Irwin III To: Andrew Morton Cc: Jason Lunz , Cameron Schaus , linux-kernel@vger.kernel.org Subject: Re: 2.6.20 OOM with 8Gb RAM Message-ID: <20070413225433.GV2986@holomorphy.com> References: <20070412173830.GA31323@schaus.ca> <20070412121553.c7fd3249.akpm@linux-foundation.org> <20070413223935.GA6783@metaxa.reflex> <20070413154653.21fdb914.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070413154653.21fdb914.akpm@linux-foundation.org> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Apr 13, 2007 at 03:46:53PM -0700, Andrew Morton wrote: > It's just weird - it exploits internal knowledge of VFS behaviour, diddles > with pagecache within a fake disk strategy handler, etc. > Furthermore, because it pretends to be a block device, the VFS will not use > highmem pages when accessing the ramdisk. So the 8GB machine will go splat > with only 800MB of ramdisk. > ramfs is much cleaner and does not have that limitation. After all this time, bdevs are still lowmem etc. Crying shame. -- wli