linux-kernel - Re: [PATCH v4] tracing/uprobes: Support ftrace_event

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Message-ID: <20130701211003.GA2147@redhat.com>
Date:	Mon, 1 Jul 2013 23:10:03 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] tracing/uprobes: Support ftrace_event_file base
	multibuffer

On 07/01, Oleg Nesterov wrote:
>
> On 06/29, zhangwei(Jovi) wrote:
> >
> > [v3->v4]:
>
> I am wondering how much you will hate me if I suggest to make v5 ;)
>
> But look, imho probe_event_enable() looks a bit more confusing than
> it needs.

And I am a bit worried this patch removes the is_trace_uprobe_enabled()
check from probe_event_enable()...

Yes I think it was never needed, afaics TRACE_REG_*_UNREGISTER can't
come without successfull _REGISTER. And the bogus uprobe_unregister()
is harmless in this particular case.

So I think this is fine, but perhaps the changelog should mention this
"offtopic" change.

Oleg.

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