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Date: Mon, 23 Feb 2009 18:23:02 +0100
From: Ingo Molnar <mingo@elte.hu>
To: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
       Randy Dunlap <randy.dunlap@oracle.com>,
       Frederic Weisbecker <fweisbec@gmail.com>,
       Steven Rostedt <rostedt@goodmis.org>, linux-kernel@vger.kernel.org,
       zippel@linux-m68k.org, linux-kbuild@vger.kernel.org
Subject: Re: [PATCH] tracing/markers: make markers select tracepoints
Message-ID: <20090223172302.GB29344@elte.hu>
References: <499EE162.4050008@oracle.com> <20090220172241.GF24538@elte.hu> <1235302980.4632.8.camel@laptop> <y0mocwuptbc.fsf@ton.toronto.redhat.com> <1235304876.4632.10.camel@laptop> <20090222122424.GA9951@redhat.com> <1235387487.4645.28.camel@laptop> <20090223154404.GA30147@redhat.com> <1235406159.4645.366.camel@laptop> <20090223171032.GA2566@redhat.com>
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* Frank Ch. Eigler <fche@redhat.com> wrote:

> > Furthermore, trace_mark() exposes that crap like an ABI, now 
> > suppose some distro goes and declares that stable for some 
> > daft reason, imagine the poor sod having to fix something 
> > littered with trace_mark().
> 
> The impression that this is somehow different with tracepoints 
> is mistaken.  Tracepoints are *exactly* as "ABI-like" as 
> markers.

they arent. To the kernel they look like function calls, with no 
ABI properties at all. They can and will change without notice.

	Ingo