Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752020AbXJVWu3 (ORCPT ); Mon, 22 Oct 2007 18:50:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751191AbXJVWuR (ORCPT ); Mon, 22 Oct 2007 18:50:17 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:50634 "EHLO the-village.bc.nu" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751189AbXJVWuP (ORCPT ); Mon, 22 Oct 2007 18:50:15 -0400 Date: Mon, 22 Oct 2007 23:52:51 +0100 From: Alan Cox To: Matt Mackall Cc: Jeff Garzik , Linus Torvalds , Geert Uytterhoeven , Jens Axboe , Linux Kernel Development , mingo@elte.hu, Linux/m68k Subject: Re: [PATCH 09/10] Change table chaining layout Message-ID: <20071022235251.656b9cad@the-village.bc.nu> In-Reply-To: <20071022214707.GJ17536@waste.org> References: <1193076664-13652-1-git-send-email-jens.axboe@oracle.com> <1193076664-13652-10-git-send-email-jens.axboe@oracle.com> <20071022211617.31f5c63d@the-village.bc.nu> <471D145A.40904@garzik.org> <20071022214707.GJ17536@waste.org> X-Mailer: Claws Mail 2.10.0 (GTK+ 2.10.14; i386-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 843 Lines: 20 On Mon, 22 Oct 2007 16:47:07 -0500 Matt Mackall wrote: > On Mon, Oct 22, 2007 at 05:21:30PM -0400, Jeff Garzik wrote: > > Alan Cox wrote: > > >Why can't we just make the list one item longer than the entry count and > > >stick a NULL on the end of it like normal people ? > > > > Certainly seems safer than the current "let's run off the end of the > > list if anything bad happens" setup... And I do not think allocating > > n+1 scatterlist entries will have much of a negative impact. > > It'll mean m-1 scatterlists fit on a slab. Is that really a credible space issue ? - 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/