linux-kernel - Re: [PATCH 1/2] tracing/kprobes: add a helper method to return number of probe hits

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Message-ID: <20161209090052.106819b2@gandalf.local.home>
Date:   Fri, 9 Dec 2016 09:00:52 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Marcin Nowakowski <marcin.nowakowski@...tec.com>
Cc:     Ingo Molnar <mingo@...hat.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] tracing/kprobes: add a helper method to return
 number of probe hits

On Fri, 9 Dec 2016 13:25:51 +0100
Marcin Nowakowski <marcin.nowakowski@...tec.com> wrote:

> The number of probe hits is stored in a percpu variable and therefore
> can't be read directly. Add a helper method trace_kprobe_nhit() that
> performs the required calculation.

Can you please add the "why?" to this change log. Who needs this
functionality, and why?

-- Steve