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

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Date:	Sun, 6 Nov 2011 13:31:32 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Anthony Liguori <anthony@...emonkey.ws>
Cc:	Avi Kivity <avi@...hat.com>, Pekka Enberg <penberg@...nel.org>,
	"kvm@...r.kernel.org list" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
	qemu-devel Developers <qemu-devel@...gnu.org>,
	Alexander Graf <agraf@...e.de>,
	Blue Swirl <blauwirbel@...il.com>,
	Américo Wang <xiyou.wangcong@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to
 test kernels

On Sun, Nov 06, 2011 at 11:08:10AM -0600, Anthony Liguori wrote:
> I'm quite happy with KVM tool and hope they continue working on it.
> My only real wish is that they wouldn't copy QEMU so much and would
> try bolder things that are fundamentally different from QEMU.

My big wish is that they don't try to merge the KVM tool into the
kernel code.  It's a separate userspace project, and there's no reason
for it to be bundled with kernel code.  It just makes the kernel
sources larger.  The mere fact that qemu-kvm exists means that the KVM
interface has to remain backward compatible; it *is* an ABI.

So integrating kvm-tool into the kernel isn't going to work as a free
pass to make non-backwards compatible changes to the KVM user/kernel
interface.  Given that, why bloat the kernel source tree size?

Please, keep the kvm-tool sources as a separate git tree.

	     	 	  	       		- Ted
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