linux-kernel - Re: Kernel-only deployments?

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Message-Id: <20180823184333.GR4225@linux.vnet.ibm.com>
Date:   Thu, 23 Aug 2018 11:43:33 -0700
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Nicolas Pitre <nicolas.pitre@...aro.org>,
        Josh Triplett <josh@...htriplett.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Kernel-only deployments?

On Thu, Aug 23, 2018 at 08:16:55PM +0200, Geert Uytterhoeven wrote:
> Hi Paul,
> 
> On Thu, Aug 23, 2018 at 7:44 PM Paul E. McKenney
> <paulmck@...ux.vnet.ibm.com> wrote:
> > Does anyone do kernel-only deployments, for example, setting up an
> > embedded device having a Linux kernel and absolutely no userspace
> > whatsoever?
> 
> Isn't that basically the original porting guide from VxWorks to Linux?

I haven't seen that document, but if you say so.  The TimeSys appnote
suggests using Linux userspace, but I can easily imagine cases where
porting the VxWorks "application" into the Linux kernel.

But do you really believe that supporting Linux-kernel-only deployments
in mainline would be something worth doing?  Who aside from rcutorture
would really use such a thing?

							Thanx, Paul

> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> -- 
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
>