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From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: "Ted Ts'o" <tytso@mit.edu>, Steven Rostedt <rostedt@goodmis.org>,
	Ingo Molnar <mingo@elte.hu>, Greg KH <gregkh@suse.de>,
	linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Arjan van de Ven <arjan@infradead.org>,
	Lin Ming <ming.m.lin@intel.com>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Avi Kivity <avi@redhat.com>
Subject: Re: [RFC][PATCH 1/5] [PATCH 1/5] events: Add EVENT_FS the event filesystem
Date: Thu, 18 Nov 2010 08:05:02 -0500	[thread overview]
Message-ID: <20101118130502.GC3741@Krystal> (raw)
In-Reply-To: <20101117234833.GK3290@thunk.org>

* Ted Ts'o (tytso@mit.edu) wrote:
> On Wed, Nov 17, 2010 at 12:52:34PM -0500, Steven Rostedt wrote:
> > 
> > I still say no to stable tracepoints in modules. Once you open that
> > door, everyone will have it.
> 
> What about having KVM define the stable tracepoints in the built-in
> part of the kernel, if CONFIG_KVM is Y or M, and then export the
> tracepoints, such that the tracepoints can be called from a module?
> 
> That way the tracepoints aren't being *defined* in a module, they are
> just being *called* from the module.  Does that seem like a reasonable
> compromise?

As Avi replied separately, he does not seem to think stable ABI is needed for
KVM, given that his tools can deal with tracepoint addition/removal pretty well.
However, let's keep this idea in mind if we ever face this issue with other
"core" modules.

Thanks Ted,

Mathieu

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com

  reply	other threads:[~2010-11-18 13:05 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-17  0:53 [RFC][PATCH 0/5] tracing/events: stable tracepoints Steven Rostedt
2010-11-17  0:53 ` [RFC][PATCH 1/5] [PATCH 1/5] events: Add EVENT_FS the event filesystem Steven Rostedt
2010-11-17  3:32   ` Greg KH
2010-11-17 10:39     ` Ingo Molnar
2010-11-17 12:25       ` Steven Rostedt
2010-11-17 15:03         ` Ingo Molnar
2010-11-17 15:16           ` Peter Zijlstra
2010-11-17 15:16           ` Steven Rostedt
2010-11-17 15:35             ` Peter Zijlstra
2010-11-17 18:42           ` Ted Ts'o
2010-11-17 15:16         ` Peter Zijlstra
2010-11-23 21:29           ` Steven Rostedt
2010-11-17 17:46         ` Mathieu Desnoyers
2010-11-17 17:52           ` Steven Rostedt
2010-11-17 18:12             ` Mathieu Desnoyers
2010-11-18  9:42               ` Avi Kivity
2010-11-17 23:48             ` Ted Ts'o
2010-11-18 13:05               ` Mathieu Desnoyers [this message]
2010-11-17 12:16     ` Steven Rostedt
2010-11-17  0:53 ` [RFC][PATCH 2/5] [PATCH 2/5] tracing/events: Add code to (un)register stable events Steven Rostedt
2010-11-17  0:54 ` [RFC][PATCH 3/5] [PATCH 3/5] tracing/events: Add infrastructure to show stable event formats Steven Rostedt
2010-11-17  0:54 ` [RFC][PATCH 4/5] [PATCH 4/5] tracing/events: Add stable event sched_switch Steven Rostedt
2010-11-17  0:54 ` [RFC][PATCH 5/5] [PATCH 5/5] tracing/events: Add sched_migrate_task stable event Steven Rostedt
2010-11-17 20:14 ` [RFC][PATCH 0/5] tracing/events: stable tracepoints Mathieu Desnoyers

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