linux-kernel - [RFC PATCH 0/3] tracing: Teach FETCH_MTD_{symbol,deref} to handle per-cpu data

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Message-ID: <20131125172106.GA14516@redhat.com>
Date:	Mon, 25 Nov 2013 18:21:06 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Namhyung Kim <namhyung.kim@....com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [RFC PATCH 0/3] tracing: Teach FETCH_MTD_{symbol,deref} to handle
	per-cpu data

On 11/23, Oleg Nesterov wrote:
>
> After I looked at Namhyung's patches I learned that trace_probes
> has a rich set of ->fetch methods.
>
> But perhaps it makes sense to add a bit more? The patch is simple
> and the idea looks natural. If this patch is accepted, I can try
> to add a bit more hacks to fetch the per-cpu data, but this needs
> a couple of simple preparations.

Before I redo/resend this patch, let me show the next changes which
allow to dump the per-cpu data.

Not for inclusion! I am not sure if this is really useful, I am not
sure about the syntax or implementation, etc. Just for discussion,
please comment.

Oleg.

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