linux-kernel - Re: [PATCH v3] kprobes: Disable Kprobe when ftrace arming fails

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Message-ID: <20150323095853.56eae095@gandalf.local.home>
Date:	Mon, 23 Mar 2015 09:58:53 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Petr Mladek <pmladek@...e.cz>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	"David S. Miller" <davem@...emloft.net>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	Ananth NMavinakayanahalli <ananth@...ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, Jiri Kosina <jkosina@...e.cz>,
	linux-kernel@...r.kernel.org,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH v3] kprobes: Disable Kprobe when ftrace arming fails

On Mon, 23 Mar 2015 14:53:06 +0100
Ingo Molnar <mingo@...nel.org> wrote:


> > I think it has to do with their RCU like patching functionality, 
> > where some tasks are still executing the old function and others are 
> > executing the new function. [...]
> 
> That would be the 'function with pending patch' state in my 
> description above.

That could be considered a bit confusing too, because the patch isn't
pending, it's already applied. But this is getting off topic, as the
code for this isn't even in mainline yet, so I agree that the use of
terminology that has not been upstreamed yet should be avoided.

-- Steve
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