Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932646AbbHGSOL (ORCPT ); Fri, 7 Aug 2015 14:14:11 -0400 Received: from mail-la0-f51.google.com ([209.85.215.51]:33320 "EHLO mail-la0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932419AbbHGSOK (ORCPT ); Fri, 7 Aug 2015 14:14:10 -0400 MIME-Version: 1.0 In-Reply-To: <55C4D87A.2030101@mentor.com> References: <55C4D87A.2030101@mentor.com> From: Andy Lutomirski Date: Fri, 7 Aug 2015 11:13:48 -0700 Message-ID: Subject: Re: [PATCH] x86/vdso: Emit a GNU hash To: Nathan Lynch Cc: Andy Lutomirski , Anton Blanchard , Martin Schwidefsky , Chris Metcalf , Richard Kuo , X86 ML , "linux-kernel@vger.kernel.org" , Isaac Dunham , Rich Felker , "musl@lists.openwall.com" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1000 Lines: 27 On Fri, Aug 7, 2015 at 9:10 AM, Nathan Lynch wrote: > On 08/06/2015 05:52 PM, Andy Lutomirski wrote: >> [adding lots of cc's] >> >> On Thu, Aug 6, 2015 at 2:45 PM, Andy Lutomirski wrote: >>> From: Andy Lutomirski >>> >>> Some dynamic loaders may be slightly faster if a GNU hash is >>> available. Strangely, this seems to have no effect at all on the >>> vdso size. > > FWIW, I see arch/x86/entry/vdso/vdso64.so increase by 168 bytes here, > using GCC 4.9.2, Binutils 2.24 as packaged by Fedora 21. > > I see a similar increase when I make the equivalent change for ARM. > > At least on my configuration, that doesn't push it across a page boundary, so it doesn't really matter. --Andy -- 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/