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Subject: Re: [PATCH 2/2] trace,x86: Add x86 irq vector entry/exit tracepoints
From: Steven Rostedt <rostedt@goodmis.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Seiji Aguchi <seiji.aguchi@hds.com>,
        Vaibhav Nagarnaik <vnagarnaik@google.com>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
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        Satoru Moriya <satoru.moriya@hds.com>
Date: Fri, 03 Feb 2012 10:40:56 -0500
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On Wed, 2011-12-14 at 17:34 +0100, Frederic Weisbecker wrote:

> Well ftrace is a whole subsystem that includes the function tracer and also an interface
> for tracepoints in debugfs. I was rather suggesting the latter one. This is a good
> choice for background tracing. And it supports stacktraces. If those generate too much
> overhead perhaps you can tune the number of entries in the stacktrace, I don't remember
> if we can do that currently but this can be an interesting feature.

Setting individual stack tracing does sound like a neat feature. Maybe
even determine a limit of how much to backtrace. Trace the full stack,
or just trace a given amount of frames.

This shouldn't be too hard to implement.

-- Steve