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Date: Tue, 26 Apr 2011 16:51:08 -0400 (EDT)
From: Vince Weaver <vweaver1@eecs.utk.edu>
To: Ingo Molnar <mingo@elte.hu>
cc: Arnaldo Carvalho de Melo <acme@infradead.org>,
        linux-kernel@vger.kernel.org, Andi Kleen <ak@linux.intel.com>,
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        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [PATCH 1/1] perf tools: Add missing user space support for
 config1/config2
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On Tue, 26 Apr 2011, Ingo Molnar wrote:

> The kernel development process is in essence an abstraction engine, and if you 
> expect something else you'll probably be facing a lot of frustrating episodes 
> in the future as well where others try to abstract out meaningful 
> generalizations.

yes, but you are taking abstraction to the extreme.

A filesystem abstracts out the access to raw disk... but under Linux we 
still allow raw access to /dev/sda

TCP/IP abstracts out the access to the network... but under Linux we still 
allow creating raw packets.

It is fine to have some sort of high-level abstraction of perf events for 
those who don't have PhDs in computer architecture.  Fine.  But don't get 
in the way of people who know what they are doing.

Vince