linux-kernel - Re: [uml-devel] [PATCH] checkstack: use $UTS

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Message-ID: <CAMuHMdXczkVGAejZ2RnsdXYvTq-8eZAhheR-ygXmXKMmh9VsEA@mail.gmail.com>
Date:	Tue, 8 Jul 2014 11:09:00 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Richard Weinberger <richard@....at>
Cc:	Konstantin Khlebnikov <koct9i@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"x86@...nel.org" <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	UML devel <user-mode-linux-devel@...ts.sourceforge.net>,
	linux-kbuild <linux-kbuild@...r.kernel.org>
Subject: Re: [uml-devel] [PATCH] checkstack: use $UTS_MACHINE as target architecture

On Tue, Jul 8, 2014 at 11:06 AM, Richard Weinberger <richard@....at> wrote:
> Am 08.07.2014 11:03, schrieb Konstantin Khlebnikov:
>> I know. But debugging/profiling of kernel code is much easier when it
>> runs in userspace.
>> I think this is the last use case where uml might beat normal hardware
>> accelerated qemu/kvm.
>> But without SMP and with that high overhead on each syscall and
>> context/mm switch it's mostly useless.
>
> The major use case of UML is that you can run it on hardware without
> KVM support.
> Everyone else is using KVM.

And that you don't need root permissions to run it.
Which is why I'm still interested in an ARM port.
Need... More... Spare... Time...

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
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