linux-kernel - Re: [GIT PULL] Performance Counters for Linux

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Message-ID: <4A314F37.2080202@davidnewall.com>
Date:	Fri, 12 Jun 2009 04:08:47 +0930
From:	David Newall <davidn@...idnewall.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Pekka Enberg <penberg@...helsinki.fi>,
	Christoph Hellwig <hch@...radead.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Al Viro <viro@...iv.linux.org.uk>, Ingo Molnar <mingo@...e.hu>,
	"David S. Miller" <davem@...emloft.net>,
	Stephane Eranian <eranian@...glemail.com>,
	linux-kernel@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [GIT PULL] Performance Counters for Linux

Linus Torvalds wrote:
> I note (once more) how _nobody_ has actually been able to accept the 
> fact that oprofile was an abject failure as it was split up. Instead, you 
> all dance around totally irrelevant issues.

Not I. I'm totally comfortable with your decision, even though it seems
counter- to your own stated policy.

While I'm still unable to help noticing things, nobody seems to have
presented an argument that user-space and kernel-side will need to be
developed together. There's been an obvious assumption, with oprofile
given as that assumption's poster-boy, but why that should be the case
for tools/perf remains unclear. Probably the reasons are so obvious that
they go without saying, but as a disinterested observer, it seems to me
that in this case the two sides really are quite separate and
independent in a very real sense. Perhaps in the same sense that acct
and quota are.
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