linux-kernel - Re: [RFC/GIT PULL] Linux KVM tool for v3.2

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Message-ID: <CAOJsxLG4+-Hmpt-dfa7auEs6H1RgWWwYYs=zzb8uvJg8m10_Nw@mail.gmail.com>
Date:	Fri, 4 Nov 2011 15:32:45 +0200
From:	Pekka Enberg <penberg@...nel.org>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Avi Kivity <avi@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Subject: Re: [RFC/GIT PULL] Linux KVM tool for v3.2

On Fri, Nov 4, 2011 at 3:02 PM, Christoph Hellwig <hch@...radead.org> wrote:
> That's pretty much a blanko argument for throwing everything into the
> kernel.  What's next, throwing your jvm into the kernel because you like
> some kernel helpers?

Please don't give Ingo any funny ideas! :-)

On Fri, Nov 4, 2011 at 3:02 PM, Christoph Hellwig <hch@...radead.org> wrote:
> We've been through this a few times - there is no reason why a tool
> using the KVM ioctls should be considered close to the kernel - all
> other users get away just fine staying out of tree, and that has
> helped to keep the ABI stable.

It's not just about the KVM ABI - it's VESA BIOS data structures,
E820, serial console registers, virtio drivers, kernel utils, and perf
utils.

I know you don't see the benefits of integrated code base but I as a
developer do.

On Fri, Nov 4, 2011 at 3:02 PM, Christoph Hellwig <hch@...radead.org> wrote:
> This sounds more like you should create a libkernelutil with useful
> data structures we use in the kernel for userspace programs.  I'd love
> to use that for a few projects, btw.

It's certainly a worthwhile project for someone. I'd love to use that too.

                                Pekka
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