linux-kernel - Re: [PATCH][RFC] trace: profile likely and unlikely annotations

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Message-ID: <alpine.DEB.1.10.0810281440390.15590@gandalf.stny.rr.com>
Date:	Tue, 28 Oct 2008 14:41:04 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Theodore Tso <tytso@....edu>
cc:	LKML <linux-kernel@...r.kernel.org>,
	Mike Snitzer <snitzer@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH][RFC] trace: profile likely and unlikely annotations


On Tue, 28 Oct 2008, Theodore Tso wrote:

> On Tue, Oct 28, 2008 at 10:49:16AM -0400, Steven Rostedt wrote:
> > 
> > OK, I'm fine with changing the terminology. v2 will do:
> > 
> >   s/hit/True/
> >   s/missed/False/
> > 
> > Fine with you?
> 
> I'm OK with either that, or with Arjan's suggestion of "Correct" and
> "Incorrect" --- although that would changing a line in the definition
> of #define unlikely(x):
> 
>                     ftrace_likely_update(&______f, !______r);
> 
> Either "True" / "False" or "Correct" / "Incorrect" has the advantage
> of being unambiguous.  "Correct" / "Incorrect" has the advantage that
> people don't have to think about the fact that for
> /proc/profile_unlikely, high numbers of "False" is a good thing, where
> as for /proc/profile_likely, high numbers of "True" is a good thing.
> With "Correct" / "Incorrect" it's easier to undersatnd that high
> numbers of "Correct" is good.   
> 
> So I can see why Arjan suggested Correct/Incorrect, although I can
> live with either.

I'm almost done with v2. Using Arjan's version (Correct/Incorrect) was 
actually a trivial change.

-- Steve

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