From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753233AbbC0GFY (ORCPT ); Fri, 27 Mar 2015 02:05:24 -0400 Received: from shonan.sfc.wide.ad.jp ([203.178.142.130]:53662 "EHLO mail.sfc.wide.ad.jp" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751952AbbC0GFV (ORCPT ); Fri, 27 Mar 2015 02:05:21 -0400 Date: Fri, 27 Mar 2015 15:05:16 +0900 Message-ID: From: Hajime Tazaki To: rusty@rustcorp.com.au Cc: richard@nod.at, linux-arch@vger.kernel.org, arnd@arndb.de, corbet@lwn.net, cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, netdev@vger.kernel.org, linux-mm@kvack.org, jdike@addtoit.com, mathieu.lacage@gmail.com Subject: Re: [RFC PATCH 00/11] an introduction of library operating system for Linux (LibOS) In-Reply-To: <87iodnqfp1.fsf@rustcorp.com.au> References: <1427202642-1716-1-git-send-email-tazaki@sfc.wide.ad.jp> <551164ED.5000907@nod.at> <55117565.6080002@nod.at> <55118277.5070909@nod.at> <55133BAF.30301@nod.at> <5514560A.7040707@nod.at> <87iodnqfp1.fsf@rustcorp.com.au> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/22.3 Mule/5.0 (SAKAKI) X-Face: "+?b:_s\r$dbBx'Ur*k#`5|~\>v~i`PzaxANTx_S?J>:mTQrtm:c7'f5b~W2eX~Fl[0Pw,0bow)8r8Z5,D&>]C/'ujqr:fbY>]/52T^Q~cX*y5\?!"i<^Vp=zCNguAeyPH$`ZTv{di25X8,%@! MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rusty, At Fri, 27 Mar 2015 14:01:22 +1030, Rusty Russell wrote: > > Richard Weinberger writes: > > This also infers that arch/lib will be broken most of the time as > > every time the networking stack references a new symbol it > > has to be duplicated into arch/lib. > > > > But this does not mean that your idea is bad, all I want to say that > > I'm not sure whether arch/lib is the right approach. > > Maybe Arnd has a better idea. > > Exactly why I look forward to getting this in-tree. Jeremy Kerr and I > wrote nfsim back in 2005(!) which stubbed around the netfilter > infrastructure; with failtest and valgrind it found some nasty bugs. It > was too much hassle to maintain out-of-tree though :( we're aware of (and respected ;)) nfsim, and expanded the idea with DCE: make test ARCH=lib gives a broad testsuite for network stack. # we also have make {test-valgrind, test-fault-injection} ARCH=lib but not well tested (of the options themselves) yet. there are the overview of test facility in my slides (the link is in my original cover letter email) > I look forward to a flood of great bugfixes from this work :) it has not been so much, but the following fix for xfrm regression was detected by this framework (through jenkins CI). git bisect is also easy (see tools/testing/libos/bisect.sh). http://patchwork.ozlabs.org/patch/436351/ thanks for the comment. -- Hajime