Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751124AbWHBEQz (ORCPT ); Wed, 2 Aug 2006 00:16:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751131AbWHBEQy (ORCPT ); Wed, 2 Aug 2006 00:16:54 -0400 Received: from ozlabs.org ([203.10.76.45]:42946 "EHLO ozlabs.org") by vger.kernel.org with ESMTP id S1751124AbWHBEQy (ORCPT ); Wed, 2 Aug 2006 00:16:54 -0400 Subject: Re: [PATCH 1 of 13] Add apply_to_page_range() which applies a function to a pte range From: Rusty Russell To: Christoph Lameter Cc: Chris Wright , "Eric W. Biederman" , Jeremy Fitzhardinge , akpm@osdl.org, linux-kernel@vger.kernel.org, Christian Limpach , Gerd Hoffmann , Hollis Blanchard , Ian Pratt , Zachary Amsden , npiggin@suse.de, Ian Wienand In-Reply-To: References: <79a98a10911fc4e77dce.1154421372@ezr.goop.org> <20060801211410.GH2654@sequoia.sous-sol.org> Content-Type: text/plain Date: Wed, 02 Aug 2006 14:16:50 +1000 Message-Id: <1154492211.2570.43.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1544 Lines: 38 On Tue, 2006-08-01 at 14:31 -0700, Christoph Lameter wrote: > On Tue, 1 Aug 2006, Chris Wright wrote: > > > We got the opposite feedback the first time we posted this function. > > Xen has some users, and I believe there's a couple in-tree functions we could > > convert easily w/out overhead issues. It's generic and this is just the > > infrastructure, I think we should leave it. > > Th generic method was proposed a number of times in the past including > by Nick Piggin and more recently by the page table abstraction layer > posted by Ian Wienand. See also > > http://www.gelato.org/pdf/apr2006/gelato_ICE06apr_unsw.pdf > http://www.gelato.org/pdf/may2005/gelato_may2005_ia64vm_chubb_unsw.pdf. > http://lwn.net/Articles/124961/ > > Special functionality may be attached at various levels, and we are very > sensitive to changes in this area. Hi Christoph, Thanks for the pointers, but as you've been debating for 18 months now, no patches are in the -mm tree or obviously about to go in, and this new helper function is orthogonal to your work, I don't think it's reasonable to delay this patch. All we can reasonably do is push this function back into the xen part of the kernel tree for now. Rusty. -- Help! Save Australia from the worst of the DMCA: http://linux.org.au/law - 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/