linux-kernel - Re: [GIT PULL] Native Linux KVM tool for 3.1

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Message-ID: <4E2D608F.6020606@redhat.com>
Date:	Mon, 25 Jul 2011 14:24:47 +0200
From:	Kevin Wolf <kwolf@...hat.com>
To:	Pekka Enberg <penberg@...nel.org>
CC:	Alexander Graf <agraf@...e.de>, Ingo Molnar <mingo@...e.hu>,
	Jan Kiszka <jan.kiszka@....de>, torvalds@...ux-foundation.org,
	avi@...hat.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	gorcunov@...il.com, levinsasha928@...il.com, asias.hejun@...il.com,
	prasadjoshi124@...il.com
Subject: Re: [GIT PULL] Native Linux KVM tool for 3.1

Am 25.07.2011 10:30, schrieb Pekka Enberg:
> Hi Alexander,
> 
> On Mon, Jul 25, 2011 at 11:14 AM, Alexander Graf <agraf@...e.de> wrote:
>>> So i wanted to have a lightweight tool that allows me to test KVM and
>>> tools/kvm/ does that very nicely: i type './kvm run' and i can test a
>>> native bzImage (which has some virtualization options enabled as
>>> well) on the _host_ distro i am running, booting to a text shell
>>> prompt.
>>
>> I do that all the time.
>>
>>  $ qemu-kvm -nographic -kernel arch/x86/boot/bzImage -append console=ttyS0
>>
>> does the exact same thing. If that's too much typing for you, make it a bash alias.
> 
> You know, they said the same thing about oprofile. All you needed to do was to
> write few simple shell scripts to make it work. One of the key
> features of tools/kvm
> is 'as little configuration as possible' and I can assure you that
> bash alias is really
> not a solution for that.

You've just chosen a different default. I'd argue that most users (i.e.
not developers of the tool or the kernel) actually want to run with a
disk image and graphics. You can type "qemu-kvm harddisk.img" and that's
it. This is clearly superior to something as tedious as "./kvm run -d
harddisk.img --sdl" and I can assure you that a bash alias is really not
a solution for that.

So, as always, which set of command line switches works better for you
depends entirely on your use case.

Kevin
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