linux-kernel - Re: [PATCH] KVM: Add wrapper script around QEMU to test kernels

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Message-ID: <4EB67486.1070105@redhat.com>
Date:	Sun, 06 Nov 2011 13:50:30 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Pekka Enberg <penberg@...nel.org>
CC:	Alexander Graf <agraf@...e.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
	"kvm@...r.kernel.org list" <kvm@...r.kernel.org>,
	qemu-devel Developers <qemu-devel@...gnu.org>,
	Américo Wang <xiyou.wangcong@...il.com>,
	Blue Swirl <blauwirbel@...il.com>
Subject: Re: [PATCH] KVM: Add wrapper script around QEMU to test kernels

On 11/06/2011 01:08 PM, Pekka Enberg wrote:
> On Sun, 2011-11-06 at 12:23 +0200, Avi Kivity wrote:
> > In most installations, qemu is driven by other programs, so any changes
> > to the command line would be invisible, except insofar as they break things.
> > 
> > For the occasional direct user of qemu, something like 'qemu-kvm -m 1G
> > /images/blah.img' is enough to boot an image.  This script doesn't help
> > in any way.
> > 
> > This script is for kernel developers who don't want to bother with
> > setting up a disk image (which, btw, many are still required to do - I'm
> > guessing most kernel developers who use qemu are cross-arch).  It has
> > limited scope and works mostly by hiding qemu features.  As such it
> > doesn't belong in qemu.
>
> I'm certainly not against merging the script if people are actually
> using it and it solves their problem.
>
> I personally find the whole exercise pointless because it's not
> attempting to solve any of the fundamental issues QEMU command line
> interface

There are no "fundamental qemu command line issues".  It's hairy, yes,
and verbose, but using "fundamental" to describe a choice between one
arcane set command line options and another is a bit of overstatement. 
Most users will use a GUI anyway.

>  has nor does it try to make Linux on Linux virtualization
> simpler and more integrated.

So far, kvm-tool capabilities are a subset of qemu's.  Does it add
anything beyond a different command-line?

> People seem to think the KVM tool is only about solving a specific
> problem to kernel developers. That's certainly never been my goal as I
> do lots of userspace programming as well. The end game for me is to
> replace QEMU/VirtualBox for Linux on Linux virtualization for my day to
> day purposes.

Maybe it should be in tools/pekka then.  Usually subsystems that want to
be merged into Linux have broaded audiences though.

-- 
error compiling committee.c: too many arguments to function

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