Re: [GIT PULL] Linux KVM tool for v3.7-rc0

From: Ingo Molnar
Date: Thu Oct 18 2012 - 06:03:12 EST

* Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:

> On Fri, Oct 12, 2012 at 02:34:33PM +0300, Pekka Enberg wrote:
> > Hi Linus,
> >
> > Please consider pulling the latest LKVM tree from:
> >
> > git:// kvmtool/for-linus
> >
> > LKVM is the long lost userspace friend of KVM that makes it really easy
> > to launch virtualized Linx environment on x86 and PPC64 Linux.
> This still doesn't have any business in the kernel tree. [...]

Pekka & the LKVM developers are using the tools/kvm/ tree setup
to create new kernel features, to improve the kernel and to
reuse kernel code, amongst other things.

So being in the kernel tree is very practical and useful to

It's also *very* useful to kernel developers like me, and I wish
all of user-space tooling was as easy to use and as well working
as 'vm run':

I'm using 'vm' regularly for quick kernel testing: I just want
something that just works and reuses the existing distro
user-space environment unintrusively. In that sense it's very
handy, 'vm' will in essence boot the well-maintained system. Not
some stale old disk image. Not a second system I need to
maintain. I'd not be using it if it didn't came integrated via
tools/ and integrated into the kernel. 'make kvmconfig' and the
other bits of practical kernel development integration are very
useful and just work as well.

The fact that it's not useful to you (yet?) that does not
invalidate the utility of this project to those to whom it *is*
useful. No argument you ever outlined here invalidates the plain
utility of this project.

Whether you think that it "has no place in the kernel" is
completely irrelevant - what matters is actual utility to

If Linus thinks that the upsides are not convincing enough (yet,
or ever), that's obviously enough reason for him to not pull it
- but that does not stop this project from being useful to those
who *are* using it to improve and test the kernel.


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