Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751410AbWEIGQ2 (ORCPT ); Tue, 9 May 2006 02:16:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751414AbWEIGQ2 (ORCPT ); Tue, 9 May 2006 02:16:28 -0400 Received: from dvhart.com ([64.146.134.43]:37858 "EHLO dvhart.com") by vger.kernel.org with ESMTP id S1751410AbWEIGQ2 (ORCPT ); Tue, 9 May 2006 02:16:28 -0400 Message-ID: <446033B4.4070500@mbligh.org> Date: Mon, 08 May 2006 23:16:20 -0700 From: "Martin J. Bligh" User-Agent: Mozilla Thunderbird 1.0.7 (X11/20051013) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Christoph Lameter Cc: Pekka Enberg , Linus Torvalds , Daniel Hokka Zakrisson , linux-kernel@vger.kernel.org, =?ISO-8859-1?Q?Bj=F6rn_Steinbrink?= , greg@kroah.com, matthew@wil.cx, manfred@colorfullife.com, akpm@osdl.org, Andy Whitcroft Subject: Re: [PATCH] fs: fcntl_setlease defies lease_init assumptions References: <445E80DD.9090507@hozac.com> <84144f020605080131r58ce2a93w6c7ba784a266bbeb@mail.gmail.com> <84144f020605080134q7e16f37fl385359c634ece8ca@mail.gmail.com> <1147104412.22096.8.camel@localhost> <1147116991.11282.3.camel@localhost> <4460113C.9090609@mbligh.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 919 Lines: 25 Christoph Lameter wrote: > On Mon, 8 May 2006, Martin J. Bligh wrote: > > >>Can't you use sparsemem instead? It solves the same problem without the >>magic faulting, doesn't it? > > > But sparsemem has more complex table lookups. Ultimately IA64 will move > to sparsemem (I think) but we are not there yet and we would like to be > sure that there are no performance regressions with that move. Please explain your concerns in more detail re complexity. I was under the impression the design avoided that nicely by folding the calculations together down into a single layer. It's been around for a long time now ... has nobody tested the performance on ia64 yet? M. - 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/