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

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Message-ID: <53BBB677.2010401@nod.at>
Date:	Tue, 08 Jul 2014 11:14:31 +0200
From:	Richard Weinberger <richard@....at>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
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

Am 08.07.2014 11:09, schrieb Geert Uytterhoeven:
> 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...

You can use KVM also without being root.
It depends on the rights of /dev/kvm.

But yes, an ARM ports would be nice to have. :)

Thanks,
//richard
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