linux-kernel - [PATCH 0/1] uprobes/perf: Avoid perf_trace_buf_prepare/submit if ->perf

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Date:	Sat, 13 Apr 2013 16:02:35 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Anton Arapov <anton@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	"yrl.pp-manager.tt@...achi.com" <yrl.pp-manager.tt@...achi.com>
Subject: [PATCH 0/1] uprobes/perf: Avoid perf_trace_buf_prepare/submit if
	->perf_events is empty

On 04/12, Steven Rostedt wrote:
>
> On Thu, 2013-04-11 at 13:59 +0200, Oleg Nesterov wrote:
>
> > > If so, we can do same thing also on trace_events.
> > > (perf_trace_##call in include/trace/ftrace.h)
> >
> > Yes, yes, this is not kprobe-specific. It seems that more users of
> > perf_trace_buf_submit() could be changed the same way.
> >
>
> Oleg,
>
> Can you make the necessary changes elsewhere? I talked with Frederic on
> IRC and he's a bit busy with other work. But he did say he would review
> changes that you make.

Sure, will be happy to do.

But can I change uprobes/perf first? I have a lot more pending changes in
trace_uprobe.c which I am going to ask to pull, I'd like to add this simple
patch to "oleg/misc uprobes/core" if I have your ack.

Oleg.

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