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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Parag Warudkar <parag.warudkar@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: From 2.4 to 2.6 to 2.7?
From: Andi Kleen <andi@firstfloor.org>
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	<20080715163205.5eddba46@the-village.bc.nu>
Date: Fri, 18 Jul 2008 11:02:22 +0200
In-Reply-To: <20080715163205.5eddba46@the-village.bc.nu> (Alan Cox's message of "Tue, 15 Jul 2008 16:32:05 +0100")
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Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

> On Tue, 15 Jul 2008 15:27:56 +0000 (UTC)
> Parag Warudkar <parag.warudkar@gmail.com> wrote:
>
>> Andi Kleen <andi <at> firstfloor.org> writes:
>> 
>> 
>> > Or you could just do it like emacs or Solaris and simply use a single number.
>> 
>> No - because then those handful of Solaris supporters will get one more 'proof'
>> in support of their claims of Linux copying Solaris - first SystemTap copying
>> DTrace and now version numbers. See how we stand a risk of ending up convinced
>> we do not innovate?
>
> "Support" - dtrace is based on the IBM work it seems, and the IBM work
> predates Solaris dtrace by a long time, so actually you could argue
> Solaris copied Linux but shipped first ;)

Actually SLES9 shipped with IBM dprobes[1] long before Solaris dtrace even
existed (and OS/2 did long before that). Back then the interest in it
was about zero though, which made SLES10 drop it again. 
I think I was one of the very few users.  Admittedly the early RPN
probes were also not particularly user friendly, but they worked.

I use this always as an example that even sophisticated users 
like system administrators and kernel hackers are somewhat marketing driven.

-Andi

[1] which BTW already supported user space probes
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