From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751823AbaKYT1x (ORCPT ); Tue, 25 Nov 2014 14:27:53 -0500 Received: from shards.monkeyblade.net ([149.20.54.216]:37394 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750891AbaKYT1v (ORCPT ); Tue, 25 Nov 2014 14:27:51 -0500 Date: Tue, 25 Nov 2014 14:27:41 -0500 (EST) Message-Id: <20141125.142741.1620673255148724338.davem@davemloft.net> To: ebiederm@xmission.com Cc: josh@joshtriplett.org, rdunlap@infradead.org, pieter@boesman.nl, alexander.h.duyck@intel.com, viro@zeniv.linux.org.uk, ast@plumgrid.com, akpm@linux-foundation.org, beber@meleeweb.net, catalina.mocanu@gmail.com, dborkman@redhat.com, edumazet@google.com, fabf@skynet.be, fuse-devel@lists.sourceforge.net, geert@linux-m68k.org, hughd@google.com, iulia.manda21@gmail.com, JBeulich@suse.com, bfields@fieldses.org, jlayton@poochiereds.net, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, mcgrof@suse.com, mattst88@gmail.com, mgorman@suse.de, mst@redhat.com, miklos@szeredi.hu, netdev@vger.kernel.org, oleg@redhat.com, Paul.Durrant@citrix.com, paulmck@linux.vnet.ibm.com, pefoley2@pefoley.com, tgraf@suug.ch, therbert@google.com, trond.myklebust@primarydata.com, willemb@google.com, xiaoguangrong@linux.vnet.ibm.com, zhenglong.cai@cs2c.com.cn Subject: Re: [PATCH v4 0/7] kernel tinification: optionally compile out splice family of syscalls (splice, vmsplice, tee and sendfile) From: David Miller In-Reply-To: <87egsr9jkz.fsf@x220.int.ebiederm.org> References: <20141125185310.GA24891@cloud> <20141125.140441.401150380839514113.davem@davemloft.net> <87egsr9jkz.fsf@x220.int.ebiederm.org> X-Mailer: Mew version 6.5 on Emacs 24.1 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.7 (shards.monkeyblade.net [149.20.54.216]); Tue, 25 Nov 2014 11:27:48 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: ebiederm@xmission.com (Eric W. Biederman) Date: Tue, 25 Nov 2014 13:16:44 -0600 > David Miller writes: > >> From: josh@joshtriplett.org >> Date: Tue, 25 Nov 2014 10:53:10 -0800 >> >>> It's not a "slippery slope"; it's been our standard practice for ages. >> >> We've never put an entire class of generic system calls behind >> a config option. > > CONFIG_SYSVIPC has been in the kernel as long as I can remember. > > I seem to remember a plan to remove that code once userspace had > finished migrating to more unixy interfaces to ipc. But in 20 years > that migration does does not seem to have finished, or even look > like it ever will. > > But if we started a slippery slope it was long long ago. Fair enough. Would be amusing if these tiny systems have it enabled.