Return-Path: linux-nfs-owner@vger.kernel.org Received: from 251.110.2.81.in-addr.arpa ([81.2.110.251]:47165 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752370AbaKZMYt (ORCPT ); Wed, 26 Nov 2014 07:24:49 -0500 Date: Wed, 26 Nov 2014 12:19:03 +0000 From: One Thousand Gnomes To: David Miller 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, ebiederm@xmission.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) Message-ID: <20141126121903.5231c854@lxorguk.ukuu.org.uk> In-Reply-To: <20141125.140441.401150380839514113.davem@davemloft.net> References: <5474ABB6.3030400@infradead.org> <20141125.121305.2094097848188324942.davem@davemloft.net> <20141125185310.GA24891@cloud> <20141125.140441.401150380839514113.davem@davemloft.net> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-nfs-owner@vger.kernel.org List-ID: On Tue, 25 Nov 2014 14:04:41 -0500 (EST) David Miller wrote: > 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. Try running an original MCC Linux binary and C lib on a current kernel We've put *entire binary formats* behind a config option. We've put older syscalls behind it, we've put sysfs behind it, sysctl behind it, the older microcode interfaces behind it, ISA bus as a concept behind options. VDSO, IPC, even 32bit support ... the list goes on and on. I'd say those were far more generic on the whole than splice/sendfile. Alan