From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 2 Apr 2007 15:29:02 -0700 (PDT) From: Christoph Lameter Subject: Re: [PATCH 1/4] x86_64: Switch to SPARSE_VIRTUAL In-Reply-To: <1175550968.22373.122.camel@localhost.localdomain> Message-ID: References: <20070401071024.23757.4113.sendpatchset@schroedinger.engr.sgi.com> <20070401071029.23757.78021.sendpatchset@schroedinger.engr.sgi.com> <200704011246.52238.ak@suse.de> <1175544797.22373.62.camel@localhost.localdomain> <1175548086.22373.99.camel@localhost.localdomain> <1175550968.22373.122.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Dave Hansen Cc: Andi Kleen , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Martin Bligh , linux-mm@kvack.org, KAMEZAWA Hiroyuki List-ID: On Mon, 2 Apr 2007, Dave Hansen wrote: > On Mon, 2007-04-02 at 14:28 -0700, Christoph Lameter wrote: > > I do not care what its called as long as it > > covers all the bases and is not a glaring performance regresssion (like > > SPARSEMEM so far). > > I honestly don't doubt that there are regressions, somewhere. Could you > elaborate, and perhaps actually show us some numbers on this? Perhaps > instead of adding a completely new model, we can adapt the existing ones > somehow. Just look at pfn_to_page and friends on ia64 and see what atrocities sparsemem does with those if you enable it. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org