linux-kernel - Re: [RFC PATCH 00/11] an introduction of library operating system for Linux (LibOS)

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Message-ID: <55118277.5070909@nod.at>
Date:	Tue, 24 Mar 2015 16:27:51 +0100
From:	Richard Weinberger <richard@....at>
To:	Hajime Tazaki <tazaki@....wide.ad.jp>
CC:	linux-arch@...r.kernel.org, arnd@...db.de, corbet@....net,
	cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
	iamjoonsoo.kim@....com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	netdev@...r.kernel.org, linux-mm@...ck.org, jdike@...toit.com,
	rusty@...tcorp.com.au, mathieu.lacage@...il.com
Subject: Re: [RFC PATCH 00/11] an introduction of library operating system
 for Linux (LibOS)

Am 24.03.2015 um 16:24 schrieb Hajime Tazaki:
> I was thinking that such 'architectural' differences in core
> idea (like system call handling, execution model, process
> context design, etc) is better to have a different architecture
> even if some part of the code is similar.
> 
> Isn't it also the same to the other 'hardware-dependent'
> architectures' case like between arm and arm64 ?
> 
> of course I'm also happy to share the code between us,
> especially _pure_ userspace part like (virtual) NIC with
> tap or pcap because we also need that part, but we kept such
> code at an external codebase (i.e., linux-libos-tools).

I'd say you should try hard to re-use/integrate your work in arch/um.
With um we already have an architecture which targets userspace,
having two needs a very good justification.

Thanks,
//richard
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