From: Frederic Weisbecker <fweisbec@gmail.com>
To: Jason Baron <jbaron@redhat.com>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu,
mathieu.desnoyers@polymtl.ca, hpa@zytor.com, tglx@linutronix.de,
rostedt@goodmis.org, andi@firstfloor.org, roland@redhat.com,
rth@redhat.com, mhiramat@redhat.com, avi@redhat.com,
davem@davemloft.net, vgoyal@redhat.com, sam@ravnborg.org
Subject: Re: [PATCH 01/13] jump label v9: notifier atomic call chain notrace
Date: Wed, 9 Jun 2010 23:58:13 +0200 [thread overview]
Message-ID: <20100609215810.GA12752@nowhere> (raw)
In-Reply-To: <dd363dd9bd8e4d3f6330f4b573dae40b76bd6dd8.1276116186.git.jbaron@redhat.com>
On Wed, Jun 09, 2010 at 05:38:52PM -0400, Jason Baron wrote:
> From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
>
> In LTTng, being able to use the atomic notifier from cpu idle entry to
> ensure the tracer flush the last events in the current subbuffer
> requires the rcu read-side to be marked "notrace", otherwise it can end
> up calling back into lockdep and the tracer.
>
> Also apply to the the die notifier.
>
> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
> Signed-off-by: Jason Baron <jbaron@redhat.com>
> Reviewed-by: Masami Hiramatsu <mhiramat@redhat.com>
> ---
I don't understand the purpose of this patch. The only notifier
I see that is used by jmp label is the module notifier, and I
don't see how it can do bad things if we don't use the notrace
version.
next prev parent reply other threads:[~2010-06-09 21:58 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-09 21:38 [PATCH 00/13] jump label v9 Jason Baron
2010-06-09 21:38 ` [PATCH 01/13] jump label v9: notifier atomic call chain notrace Jason Baron
2010-06-09 21:58 ` Frederic Weisbecker [this message]
2010-06-10 15:34 ` Jason Baron
2010-06-09 21:38 ` [PATCH 02/13] jump label v9: base patch Jason Baron
2010-06-09 22:35 ` Frederic Weisbecker
2010-06-10 15:44 ` Jason Baron
2010-06-10 16:22 ` Ingo Molnar
2010-06-10 17:11 ` Frederic Weisbecker
2010-06-09 22:36 ` Frederic Weisbecker
2010-06-10 12:06 ` Peter Zijlstra
2010-06-10 12:18 ` Peter Zijlstra
2010-06-09 21:39 ` [PATCH 03/13] jump label v9: x86 support Jason Baron
2010-06-10 12:12 ` Peter Zijlstra
2010-06-10 12:14 ` Ingo Molnar
2010-06-10 13:26 ` Andi Kleen
2010-06-10 14:12 ` Peter Zijlstra
2010-06-10 14:28 ` Andi Kleen
2010-06-10 15:37 ` Ingo Molnar
2010-06-10 16:24 ` Andi Kleen
2010-06-11 8:12 ` Ingo Molnar
2010-06-11 8:30 ` Andi Kleen
2010-06-10 16:29 ` Steven Rostedt
2010-06-10 15:04 ` Jason Baron
2010-06-10 16:13 ` Mathieu Desnoyers
2010-06-11 0:52 ` Jason Baron
2010-06-11 6:18 ` H. Peter Anvin
2010-06-11 7:58 ` Ingo Molnar
2010-06-10 12:15 ` Peter Zijlstra
2010-06-10 12:33 ` Peter Zijlstra
2010-06-09 21:39 ` [PATCH 04/13] jump label v9: tracepoint support Jason Baron
2010-06-10 12:22 ` Peter Zijlstra
2010-06-09 21:39 ` [PATCH 05/13] jump label v9: add module support Jason Baron
2010-06-09 21:39 ` [PATCH 06/13] jump label v9: move ftrace_dyn_arch_init to common code Jason Baron
2010-06-19 3:24 ` Steven Rostedt
2010-06-09 21:39 ` [PATCH 07/13] jump label v9: sort jump table at build-time Jason Baron
2010-06-09 21:39 ` [PATCH 08/13] jump label v9: initialize workqueue tracepoints *before* they are registered Jason Baron
2010-06-09 21:39 ` [PATCH 09/13] jump label v9: jump_label_text_reserved() to reserve our jump points Jason Baron
2010-06-09 21:39 ` [PATCH 10/13] jump label v9: convert jump label to use a key Jason Baron
2010-06-10 12:38 ` Peter Zijlstra
2010-06-10 12:43 ` Peter Zijlstra
2010-06-10 13:57 ` Jason Baron
2010-06-10 14:46 ` Peter Zijlstra
2010-06-09 21:39 ` [PATCH 11/13] jump label v9: convert dynamic debug to use jump labels Jason Baron
2010-06-09 21:39 ` [PATCH 12/13] jump label v9: sparc64 add jump_label support Jason Baron
2010-06-09 21:39 ` [PATCH 13/13] jump label v9: add docs Jason Baron
2010-06-10 12:49 ` Peter Zijlstra
2010-06-15 3:47 ` [PATCH 00/13] jump label v9 David Miller
2010-06-15 14:28 ` Jason Baron
2010-06-15 15:44 ` Mathieu Desnoyers
2010-06-18 3:45 ` Tony Breeds
2010-06-18 15:18 ` Mathieu Desnoyers
2010-06-15 17:13 ` David Miller
2010-06-15 17:28 ` H. Peter Anvin
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