linux-kernel - Re: A system for rebootless kernel security updates

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Message-ID: <48109C59.2010203@firstfloor.org>
Date:	Thu, 24 Apr 2008 16:42:33 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Tomasz Chmielewski <mangoo@...g.org>
CC:	LKML <linux-kernel@...r.kernel.org>, jbarnold@....EDU,
	francois.cami@...e.fr, mail@...thworm.de
Subject: Re: A system for rebootless kernel security updates


> And those patent descriptions, by the way, remind the way kexec works
> ("A software module is hotpatched by loading a patch into memory and
> modifying an instruction in the original module to jump to the patch"),
> which was released much earlier... In essence, they patented kexec ;)

The basic patching idea is old and has been used many times, long
predating kexec. e.g. it's a common way to implement incremental linkers
too.

-Andi

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