linux-kernel - Re: [PATCH] perf auto-dep: Speed up feature tests by building them in parallel

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Message-ID: <20130930173627.GF10293@ghostprotocols.net>
Date:	Mon, 30 Sep 2013 14:36:27 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	David Ahern <dsahern@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...il.com>
Subject: Re: [PATCH] perf auto-dep: Speed up feature tests by building them
 in parallel

Em Mon, Sep 30, 2013 at 02:30:52PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Mon, Sep 30, 2013 at 02:27:41PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Mon, Sep 30, 2013 at 02:12:20PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > Em Mon, Sep 30, 2013 at 06:42:10PM +0200, Ingo Molnar escreveu:
> > > > This series (with combo patch attached) implements (much) faster 
> > > > perf-tools feature-auto-detection.

> Removed python-devel and it correctly turned those off:
> 
> ...                     libpython: [ OFF ]
> ...             libpython-version: [ OFF ]
> 
> One possible way to speed this up a bit more would be to somehow state that if
> the test A fails, then don't even bother testing test B, like in the case above.

Another suggestion: To provide a short sentence with each feature
stating what will be not present when something is "OFF", or even a
sentence stating what the feature is about, so the user get a better
picture of what is (not) being built into his tool.

Probably reusing strings we already have in the makefiles.

- Arnaldo
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