linux-kernel - Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3

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Date:	Mon, 11 Jun 2007 11:03:48 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Tarkan Erimer <tarkan@...one.net.tr>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	debian developer <debiandev@...il.com>,
	"david@...g.hm" <david@...g.hm>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>
Subject: Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3

* Tarkan Erimer <tarkan@...one.net.tr> wrote:

> > (*) And I've been pushing for that since before they even released 
> > it - I walked out on Bill Joy at a private event where they 
> > discussed their horrible previous Java license.
> 
> Thanks for making things more clear :-) Some really strong indications 
> that Sun is very willing to,at least, "Dual-License" the OpenSolaris 
> with GPLv3. I think; in a very short time; we will see when the GPLv3 
> finalized and released.

that would certainly be a good and productive move from them. Note the 
issue that others have pointed out to you: OpenSolaris is probably more 
interested in picking up code from Linux than the other way around! :-) 
You mentioned "dtrace" and "ZFS". Firstly, Linux already has a "dtrace" 
equivalent. Secondly, ZFS might be interesting in theory, although our 
prior experience of having compatibly-licensed filesystems ported over 
to Linux has been pretty negative: XFS ended up being an integration 
nightmare - and that doesnt have to do anything with the qualities of 
XFS (it's one of the cleanest Linux filesystems, if not the cleanest), 
the problem is that components within a kernel are very tightly 
integrated and rarely does it make sense to port over more than just 
drivers or maybe libraries. And that's i guess what OpenSolaris lacks 
and which i suspect it is mostly interested in: lots of nice Linux 
drivers ;-) XFS, the largest Linux filesystem is 100K lines of code - 
and ZFS (i've never seen it) is very likely smaller than that. Linux 
drivers on the other hand, as of today, are _3.7 million_ lines of code 
and enable Linux to run on 99% of the hardware that is produced today. 
Guess which one has the larger strategic significance? ;-)

	Ingo
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