linux-kernel - Re: [PATCH 2/2] Kprobes: Move kprobes examples to samples/

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Date:	Thu, 3 Jan 2008 21:14:23 +0530
From:	Ananth N Mavinakayanahalli <ananth@...ibm.com>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	Ingo Molnar <mingo@...e.hu>, akpm@...ux-foundation.org,
	lkml <linux-kernel@...r.kernel.org>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	davem@...emloft.net, hskinnemoen@...el.com, mhiramat@...hat.com,
	sam@...nborg.org, randy.dunlap@...cle.com
Subject: Re: [PATCH 2/2] Kprobes: Move kprobes examples to samples/

On Thu, Jan 03, 2008 at 10:18:06AM -0500, Mathieu Desnoyers wrote:
> * Ingo Molnar (mingo@...e.hu) wrote:
> > 
> > * Ananth N Mavinakayanahalli <ananth@...ibm.com> wrote:
> > 
> > > > feature request: please make this work in the !modular case as well 
> > > > - if built-in then it should just run sometime during bootup and run 
> > > > the tests and report success/failure. This way automated testing can 
> > > > pick up any regressions much easier.
> > > 
> > > Will try cook up something along those lines. It'll be easy to verify 
> > > if the probes inserted and removed properly, but verifying handlers 
> > > run correctly will need some work.
> > > 
> > > We have a sort of regression test bucket that uses expect to parse the 
> > > dmesg to verify handlers did run correctly; that isn't a totally 
> > > in-kernel solution anyway. I have a couple of ideas in mind to make it 
> > > easier.
> > 
> > Great. Would be really nice to have something along the lines of 
> > CONFIG_DEBUG_LOCKING_API_SELFTESTS. Those unit tests took time to 
> > develop, but they caught more than 90% (!) of the internal lockdep 
> > engine bugs before they ever hit mainline.
> > 
> 
> I would just like to point out that the samples/ directory should keep
> files as easy to read and understand for newcomers (it is meant to be
> compiled Documentation examples). I see the interest in turning it into
> a regression test too, but I would recommend leaving the "test" code out
> of the sample module itself to improve readability.

Agreed. I am working on a test bucket that doesn't touch the samples.
It'll live on its own, helping with boot time smoke tests.

Ananth
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