linux-kernel - Re: [tip:perf/core] perf: Fix broken union in ' struct perf_event_mmap

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Message-ID: <alpine.DEB.2.02.1309181013100.23210@pianoman.cluster.toy>
Date:	Wed, 18 Sep 2013 10:19:32 -0400 (EDT)
From:	Vince Weaver <vince@...ter.net>
To:	Peter Zijlstra <peterz@...radead.org>
cc:	mingo@...nel.org, hpa@...or.com, linux-kernel@...r.kernel.org,
	adrian.hunter@...el.com, tglx@...utronix.de,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:perf/core] perf: Fix broken union in ' struct
 perf_event_mmap_page'

On Wed, 18 Sep 2013, Peter Zijlstra wrote:

> > This patch somehow breaks the perf-ABI.
> 
> Difficult call that..

OK, let me rephrase.

This change broke existing working code.

Can you point to any code that is fixed by the commit?

If not, I think the rule is you revert the changeset.

Or you can just mark the bug "Won't fix, perf tool doesn't use it" I guess

You guys told me to start running my tests in -rc1 so I can catch bugs 
early enough to fix things.  So here I am, finding a problem in -rc1.
If no one cares I'll stop bothering and go back to just documenting the 
problems after the fact in complaining webpages.

Vince
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