Re: RT patch acceptance

Andrea Arcangeli
2005-06-01T14:46:27Z

On Wed, Jun 01, 2005 at 04:32:02PM +0200, Andrea Arcangeli wrote:
> years of doing that in linux. I'm not a lawyer but you may want to
> check before investing too much on this for the next 15 years. The

Here's a link that may be of interest:

http://www.fsmlabs.com/openpatentlicense.html
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=/netahtml/search-bool.html&r=12&f=G&l=50&co1=AND&d=ptxt&s1=5,995,745&OS=5,995,745&RS=5,995,745

This means all preempt-RT users are forced to release all their userland
code that runs with RT prio as GPL (not just the preempt-RT kernel
patch). This is not the case with RTAI. This will expire in a matter of
about 15 years so it's not too bad, and I was approximative when I've
said preempt-RT infringe on the patent. You Ingo are perfectly safe,
it's only the preempt-RT users that will infringe unless all their RT
code is GPL'd.

This is JFYI.