Date: Fri, 28 Nov 2008 13:51:25 +0000
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Dmitri Monakhov <dmonakhov@openvz.org>
Cc: Izik Eidus <ieidus@redhat.com>, akpm@linux-foundation.org,
       linux-kernel@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org,
       aarcange@redhat.com, chrisw@redhat.com, avi@redhat.com,
       dlaor@redhat.com, kamezawa.hiroyu@jp.fujitsu.com,
       cl@linux-foundation.org, corbet@lwn.net
Subject: Re: [PATCH 0/4] ksm - dynamic page sharing driver for linux v2
Message-ID: <20081128135125.1ee31684@lxorguk.ukuu.org.uk>
In-Reply-To: <m33ahcc8kh.fsf@dmon-lap.sw.ru>
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	<m33ahcc8kh.fsf@dmon-lap.sw.ru>
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> 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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