linux-kernel - Re: [PATCH 3/3] tracing/perf: Avoid perf_trace_buf_*() in perf_trace

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Message-ID: <1371666293.18733.52.camel@gandalf.local.home>
Date:	Wed, 19 Jun 2013 14:24:53 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] tracing/perf: Avoid perf_trace_buf_*() in
 perf_trace_##call() when possible

On Wed, 2013-06-19 at 20:12 +0200, Oleg Nesterov wrote:

> > Or is this your way to confuse me as much as my code has confused
> > you? ;-)
> 
> Of course! this was the main reason.

I knew it!

> 
> 
> Steven, I convinced myself the patch should be correct. If you agree with
> this hack:
> 
> 	- anything else I should do apart from the change above?
> 
> 	- should I resend the previous "[PATCH 0/3] tracing: more
> 	  list_empty(perf_events) checks" series?
> 
> 	  This series depends on "[PATCH 3/3] tracing/perf: Move the
> 	  PERF_MAX_TRACE_SIZE check into perf_trace_buf_prepare()".
> 
> 	  Or I can drop this patch if you do not like it and rediff.
> 
> 	  Just in case, there are other pending patches in trace_kprobe.c
> 	  which I am going to resend, but they are orthogonal.

I'll pull in the patches and play with them. I'll let you know what I
find.

Thanks,


-- Steve


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