Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751312AbVKGLBN (ORCPT ); Mon, 7 Nov 2005 06:01:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751325AbVKGLBM (ORCPT ); Mon, 7 Nov 2005 06:01:12 -0500 Received: from e3.ny.us.ibm.com ([32.97.182.143]:33504 "EHLO e3.ny.us.ibm.com") by vger.kernel.org with ESMTP id S1751312AbVKGLBL (ORCPT ); Mon, 7 Nov 2005 06:01:11 -0500 Subject: Re: [Lhms-devel] [PATCH 0/7] Fragmentation Avoidance V19 From: Dave Hansen To: Ingo Molnar Cc: Linus Torvalds , Kyle Moffett , Paul Jackson , andy@thermo.lanl.gov, mbligh@mbligh.org, Andrew Morton , arjan@infradead.org, arjanv@infradead.org, kravetz@us.ibm.com, lhms , Linux Kernel Mailing List , linux-mm , mel@csn.ul.ie, Nick Piggin In-Reply-To: <20051107080042.GA29961@elte.hu> References: <20051104010021.4180A184531@thermo.lanl.gov> <20051103221037.33ae0f53.pj@sgi.com> <20051104063820.GA19505@elte.hu> <796B585C-CB1C-4EBA-9EF4-C11996BC9C8B@mac.com> <20051107080042.GA29961@elte.hu> Content-Type: text/plain Date: Mon, 07 Nov 2005 12:00:58 +0100 Message-Id: <1131361258.5976.53.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.0.4 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 948 Lines: 21 On Mon, 2005-11-07 at 09:00 +0100, Ingo Molnar wrote: > * Linus Torvalds wrote: > > So remappable kernels are certainly doable, they just have more > > fundamental problems than remappable user space _ever_ has. Both from > > a performance and from a complexity angle. > > furthermore, it doesnt bring us any closer to removable RAM. The problem > is still unsolvable (due to the 'how to do you find live pointers to fix > up' issue), even if the full kernel VM is 'mapped' at 4K granularity. I'm not sure I understand. If you're remapping, why do you have to find live and fix up live pointers? Are you talking about things that require fixed _physical_ addresses? -- Dave - 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/