Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755884AbXFGKCe (ORCPT ); Thu, 7 Jun 2007 06:02:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752702AbXFGKCY (ORCPT ); Thu, 7 Jun 2007 06:02:24 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:57123 "EHLO the-village.bc.nu" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752665AbXFGKCX (ORCPT ); Thu, 7 Jun 2007 06:02:23 -0400 Date: Thu, 7 Jun 2007 11:06:23 +0100 From: Alan Cox To: Davide Libenzi Cc: Linux Kernel Mailing List , Linus Torvalds , Andrew Morton , Ulrich Drepper , Ingo Molnar , Eric Dumazet Subject: Re: [patch 7/8] fdmap v2 - implement sys_socket2 Message-ID: <20070607110623.53322dae@the-village.bc.nu> In-Reply-To: References: <20070606235906.72439d16@the-village.bc.nu> <20070607001932.35c9591c@the-village.bc.nu> X-Mailer: Claws Mail 2.9.1 (GTK+ 2.10.8; 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: 896 Lines: 16 > I don't think it's a matter of versioning. Many userspace libraries > expects their fds to be compact (for many reasons - they use select, they > use them to index 0-based arrays, etc...), and if the kernel suddendly > starts returning values in the 1<<28 up arena, they sure won't be happy. > So I believe that the correct way is that the caller specifically selects > the feature, leaving the legacy fd allocation as default. I don't understand the connection between this paragraph (with which I agree) and the urge to add a ton of ugly syscall hacks. "Caller specifically selects feature" - > prctl(). Libraries get unhappy -> linker 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/