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Date: Mon, 24 Nov 2008 06:41:24 -0500
From: Christoph Hellwig <hch@infradead.org>
To: Mathieu Desnoyers <compudj@krystal.dyndns.org>
Cc: ltt-dev@lists.casi.polymtl.ca, Zhaolei <zhaolei@cn.fujitsu.com>,
       Lai Jiangshan <laijs@cn.fujitsu.com>, Ingo Molnar <mingo@elte.hu>,
       Steven Rostedt <rostedt@goodmis.org>, linux-kernel@vger.kernel.org
Subject: Re: LTTng kernel integration roadmap, update
Message-ID: <20081124114124.GA32459@infradead.org>
References: <20081124112842.GA15615@Krystal>
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On Mon, Nov 24, 2008 at 06:28:42AM -0500, Mathieu Desnoyers wrote:
> - trimmed-down lttv for the kernel tree
>   Need to look at
>   git://git.kernel.org/pub/scm/linux/kernel/git/sam/test.git#master
>   tests/ directory, which permits building userspace tools with the
>   Linux kernel. I recently got the idea of populating debugfs with
>   userspace tools that would sits in kernel module data. How (in)sane
>   does this idea look ? That would seems like a rather good solution to
>   ship the userspace tool with the kernel.

Completely insane I'd say.  Debugfs is per defintion populated from
kernelspace, and adding another mixed user/kernel populated fs like
devfs is a rather bad idea.  I don't quite see any point in shipping
lttv with the kernel tree either, it shouldn't really need knowledge of
the kernel version.