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From: Tejun Heo <tj@kernel.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Pierre Tardy <tardyp@gmail.com>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Thomas Renninger <trenn@suse.de>,
	Jean Pihet <jean.pihet@newoldbits.com>,
	linux-trace-users@vger.kernel.org,
	linux-pm@lists.linux-foundation.org,
	linux-perf-users@vger.kernel.org, mingo@elte.hu,
	arjan@linux.intel.com, rjw@sisk.pl, linux-omap@vger.kernel.org,
	Peter Zijlstra <peterz@infradead.org>,
	Kevin Hilman <khilman@deeprootsystems.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Frank Eigler <fche@redhat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: PATCH [0/4] perf: clean-up of power events API
Date: Fri, 08 Oct 2010 10:14:40 +0200	[thread overview]
Message-ID: <4CAED2F0.9080801@kernel.org> (raw)
In-Reply-To: <20101007155816.GA5351@nowhere>

Hello,

On 10/07/2010 05:58 PM, Frederic Weisbecker wrote:
> I really feel uncomfortable with this tracepoint/ABI problem....
> Mathieu suggested we start a user library that could handle these
> changes when they are really necessary.
> 
> Thoughts?
> 
> (Adding Tejun in Cc).

Given that tracepoints are supposed to make internal operation
visible.  I don't think it's a good idea to make it part of fixed ABI.
Maybe some core part can be put in stone but I think things like
internal workqueue implementation should be changeable without
worrying about ABI issues.

Thanks.

-- 
tejun

  parent reply	other threads:[~2010-10-08  8:16 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-04 15:20 PATCH [0/4] perf: clean-up of power events API Jean Pihet
2010-10-04 15:20 ` [PATCH 1/4] perf: cleanup " Jean Pihet
2010-10-04 15:20 ` [PATCH 2/4] perf: add OMAP support for the new power events Jean Pihet
2010-10-04 19:45   ` Thomas Renninger
2010-10-04 15:21 ` [PATCH 3/4] perf: add calls to suspend trace point Jean Pihet
2010-10-04 22:52   ` Rafael J. Wysocki
2010-10-04 15:21 ` [PATCH 4/4] perf: provide a DEPRECTAED power trace API to user space Jean Pihet
2010-10-04 16:10   ` Frank Ch. Eigler
2010-10-04 16:47     ` Jean Pihet
2010-10-06 21:34 ` PATCH [0/4] perf: clean-up of power events API Thomas Renninger
2010-10-07 15:08   ` Mathieu Desnoyers
2010-10-07 15:23     ` Pierre Tardy
2010-10-07 15:45       ` Steven Rostedt
2010-10-07 15:58       ` Frederic Weisbecker
2010-10-07 16:10         ` Pierre Tardy
2010-10-08  8:14         ` Tejun Heo [this message]
2010-10-08  8:38           ` Ingo Molnar
2010-10-08 13:17             ` Arjan van de Ven
2010-10-08 13:41               ` Mathieu Desnoyers
2010-10-08 16:22                 ` Arjan van de Ven
2010-10-08 17:21                   ` Steven Rostedt
2010-10-08 17:49                     ` Frank Ch. Eigler
2010-10-08 18:11                       ` Steven Rostedt
2010-10-08 17:32                   ` Mathieu Desnoyers
2010-10-09  6:28                 ` Ingo Molnar
2010-10-09  8:14                   ` Pierre Tardy
2010-10-09 18:36                     ` Linus Torvalds
2010-10-09 21:15                       ` Steven Rostedt
2010-10-09 23:20                         ` Linus Torvalds
2010-10-10  1:39                           ` Steven Rostedt
2010-10-10  6:41                             ` Peter Zijlstra
2010-10-10 15:11                               ` Steven Rostedt
2010-10-18 12:15                       ` Jean Pihet
2010-10-09 16:19                   ` Arjan van de Ven
2010-10-09 21:34                     ` Steven Rostedt
2010-10-10 12:19                     ` Ingo Molnar
2010-10-19 11:31                       ` Thomas Renninger
2010-10-19 11:45                         ` Ingo Molnar
2010-10-19 11:47                           ` Peter Zijlstra
2010-10-19 11:52                             ` Ingo Molnar
2010-10-19 13:27                               ` Arjan van de Ven
2010-10-19 13:50                                 ` Ingo Molnar
2010-10-19 13:52                                   ` Arjan van de Ven
2010-10-19 14:51                                     ` Ingo Molnar
2010-10-07 15:45     ` Jean Pihet
2010-10-07 15:49     ` Thomas Renninger
2010-10-07 15:56       ` Jean Pihet

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