From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759275AbbA2ByL (ORCPT ); Wed, 28 Jan 2015 20:54:11 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:38457 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754280AbbA2ByI (ORCPT ); Wed, 28 Jan 2015 20:54:08 -0500 Date: Wed, 28 Jan 2015 22:07:51 +0100 From: Pavel Machek To: Tom Zanussi Cc: josh@joshtriplett.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 05/10] drivers/char: Support compiling out /dev/zero Message-ID: <20150128210751.GA14006@amd> References: <79846ac644fe9103ef9b7cb0ab69e6f196f27853.1422035184.git.tom.zanussi@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <79846ac644fe9103ef9b7cb0ab69e6f196f27853.1422035184.git.tom.zanussi@linux.intel.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri 2015-01-23 12:37:11, Tom Zanussi wrote: > Some embedded systems with tightly controlled userspace have no use > for /dev/zero, and could benefit from the size savings gained by > omitting it. Add a new EMBEDDED config option to disable it. > > bloat-o-meter (based on tinyconfig): > > add/remove: 0/3 grow/shrink: 0/1 up/down: 0/-391 (-391) > function old new delta > chr_dev_init 162 147 -15 > mmap_zero 16 - -16 > zero_fops 116 - -116 > zero_bdi 244 - -244 > > Signed-off-by: Tom Zanussi I'm not sure that 400 bytes are worth additional Kconfig noise. .. and pretty much everyone needs /dev/zero... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html