linux-kernel - Re: [PATCH 0/2] Kernel Live Patching

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Message-ID: <20141107123154.GA4071@treble.redhat.com>
Date:	Fri, 7 Nov 2014 06:31:54 -0600
From:	Josh Poimboeuf <jpoimboe@...hat.com>
To:	Vojtech Pavlik <vojtech@...e.cz>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Seth Jennings <sjenning@...hat.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Steven Rostedt <rostedt@...dmis.org>,
	live-patching@...r.kernel.org, kpatch@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] Kernel Live Patching

On Thu, Nov 06, 2014 at 09:24:23PM +0100, Vojtech Pavlik wrote:
> On Thu, Nov 06, 2014 at 10:58:57AM -0800, Christoph Hellwig wrote:
> 
> > On Thu, Nov 06, 2014 at 07:51:57PM +0100, Vojtech Pavlik wrote:
> > > I don't think this specific example was generated. 
> > > 
> > > I also don't think including the whole kpatch automation into the kernel
> > > tree is a viable development model for it. (Same would apply for kGraft
> > > automation.)
> > 
> > Why?  We (IMHO incorrectly) used the argument of tight coupling to put
> > perf into the kernel tree.  Generating kernel live patches is way more
> > integrated that it absolutely has to go into the tree to be able to do
> > proper development on it in an integrated fashion.
> 
> One reason is that there are currently at least two generators using
> very different methods of generation (in addition to the option of doing
> the patch module by hand), and neither of them are currently in a state
> where they would be ready for inclusion into the kernel (although the
> kpatch one is clearly closer to that).

What generator does kGraft have?  Is that the one that generates the
source patch, or is there one that generates a binary patch module?

-- 
Josh
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