Re: [RFC][PATCH] tracing: Remove useless 4 bytes of padding from every event [LWN.net]

From:		Linus Torvalds <torvalds-AT-linux-foundation.org>
To:		Steven Rostedt <rostedt-AT-goodmis.org>
Subject:		Re: [RFC][PATCH] tracing: Remove useless 4 bytes of padding from every event
Date:		Wed, 16 May 2012 12:33:59 -0700
Message-ID:		<CA+55aFzVngkixn-t0mK8QqgnPhCzN2AsUtzfZ3BkLiJAcjNOzQ@mail.gmail.com>
Cc:		LKML <linux-kernel-AT-vger.kernel.org>, Arjan van de Ven <arjan-AT-linux.intel.com>, Ingo Molnar <mingo-AT-elte.hu>, Frederic Weisbecker <fweisbec-AT-gmail.com>, David Sharp <dsharp-AT-google.com>, Vaibhav Nagarnaik <vnagarnaik-AT-google.com>, Peter Zijlstra <peterz-AT-infradead.org>, Andrew Morton <akpm-AT-linux-foundation.org>
Archive-link:		Article, Thread

On Wed, May 16, 2012 at 6:44 AM, Steven Rostedt <rostedt@goodmis.org> wrote:
>
> But this change will break PowerTop v1. Thus my question is, how long do
> we need to keep this wasted space in the ring buffers to satisfy an out
> of date tool?

The wasted space seems of limited importance.

More important is to check which distros have the new powertop.

F16 and F17 seem to have powertop-1.98, which I assume is the new
world order already. But maybe I assume incorrectly.

F14 (which I personally still use, since it doesn't have gnome3) is 1.13.

SuSE, Ubuntu?

                    Linus

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