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

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Date:	Mon, 07 Nov 2011 13:18:49 +0100
From:	Gerd Hoffmann <kraxel@...hat.com>
To:	Pekka Enberg <penberg@...nel.org>
CC:	Paolo Bonzini <pbonzini@...hat.com>,
	Sasha Levin <levinsasha928@...il.com>,
	Blue Swirl <blauwirbel@...il.com>,
	"kvm@...r.kernel.org list" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
	Alexander Graf <agraf@...e.de>,
	qemu-devel Developers <qemu-devel@...gnu.org>,
	Avi Kivity <avi@...hat.com>,
	Américo Wang <xiyou.wangcong@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] KVM: Add wrapper script around QEMU to test kernels

On 11/07/11 12:44, Pekka Enberg wrote:
> On Mon, Nov 7, 2011 at 1:02 PM, Paolo Bonzini <pbonzini@...hat.com> wrote:
>> Indeed I do not see any advantage, since all the interfaces they use are
>> stable anyway (sysfs, msr.ko).
>>
>> If they had gone in x86info, for example, my distro (F16, not exactly
>> conservative) would have likely picked those tools up already, but it
>> didn't.
> 
> Distributing userspace tools in the kernel tree is a relatively new
> concept so it's not at all surprising distributions don't pick them up
> as quickly. That doesn't mean it's a fundamentally flawed approach,
> though.

tools/ lacks a separation into "kernel hacker's testing+debugging
toolbox" and "userspace tools".  It lacks proper buildsystem integration
for the userspace tools, there is no "make tools" and also no "make
tools_install".  Silently dropping new stuff into tools/ and expecting
the world magically noticing isn't going to work.

cheers,
  Gerd
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