From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753883AbaBDE7M (ORCPT ); Mon, 3 Feb 2014 23:59:12 -0500 Received: from mail.skyhub.de ([78.46.96.112]:50816 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752394AbaBDE7H (ORCPT ); Mon, 3 Feb 2014 23:59:07 -0500 Date: Tue, 4 Feb 2014 05:59:04 +0100 From: Borislav Petkov To: Andrew Morton Cc: Linus Torvalds , David Rientjes , LKML , X86 ML , Richard Weinberger , Borislav Petkov Subject: Re: [PATCH] Clarify CONFIG_DEBUG_INFO's bloaty nature Message-ID: <20140204045904.GA4340@pd.tnic> References: <1391452183-2160-1-git-send-email-bp@alien8.de> <20140203145718.5bc9ba1619aff8ea0754b0ab@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20140203145718.5bc9ba1619aff8ea0754b0ab@linux-foundation.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 03, 2014 at 02:57:18PM -0800, Andrew Morton wrote: > On Mon, 3 Feb 2014 14:47:15 -0800 Linus Torvalds wrote: > > > On Mon, Feb 3, 2014 at 2:00 PM, David Rientjes wrote: > > > > > > How do you define "huge bloat" if the size of vmlinux doesn't increase? > > > > Don't be silly. The size of all the object files increase *hugely*. > > yup, I disable this in my allmodconfig testing, to great effect. > > That being said, I do think the text should make clear that the bloat > is a compile-time impact and not a runtime one. Something like > > --- a/lib/Kconfig.debug~lib-kconfigdebug-clarify-config_debug_infos-bloaty-nature-fix > +++ a/lib/Kconfig.debug > @@ -128,9 +128,9 @@ config DEBUG_INFO > tools like crash, kgdb, LKCD, gdb, etc on the kernel. > > If you only want to have resolved symbols in kernel traces and > - are not going to need support for those tools above, you don't need > - to enable this as it is a huge bloat and build slowdown; > - enable CONFIG_KALLSYMS instead. > + are not going to need support for the above tools, you don't need > + to enable this. It hugely bloat object files' on-disk sizes and slows > + the build. Enable CONFIG_KALLSYMS instead. Yes, this is better. Andrew, can you add that or you want me to send a new version? Thanks. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --