Re: [PATCH 0/4] ksm - dynamic page sharing driver for linux v2

[Alan Cox]

> You have implemented second one, but seems it already was patented
> http://www.google.com/patents?vid=USPAT6789156
> I'm not a lawyer but IMHO we have direct conflict here.
> >From other point of view they have patented the WEEL, but at least we
> have to know about this.

Its an old idea and appeared for Linux in March 1998: Little project from
Philipp Reisner called "mergemem".

http://groups.google.com/group/muc.lists.linux-kernel/browse_thread/thread/387af278089c7066?ie=utf-8&oe=utf-8&q=share+identical+pages#b3d4f68fb5dd4f88

so if there is a patent which is relevant (and thats a question for
lawyers and legal patent search people) perhaps the Linux Foundation and
some of the patent busters could take a look at mergemem and
re-examination.

Alan
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