From: Oleg Nesterov <oleg@redhat.com>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Steven Rostedt <rostedt@goodmis.org>,
Namhyung Kim <namhyung.kim@lge.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@redhat.com>, Jiri Olsa <jolsa@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] tracing: Introduce "pseudo registers" for FETCH_MTD_reg
Date: Mon, 25 Nov 2013 15:35:21 +0100 [thread overview]
Message-ID: <20131125143521.GA29815@redhat.com> (raw)
In-Reply-To: <877gbwsy8w.fsf@sejong.aot.lge.com>
On 11/25, Namhyung Kim wrote:
>
> On Sun, 24 Nov 2013 16:32:53 +0900, Masami Hiramatsu wrote:
> > (2013/11/24 5:16), Oleg Nesterov wrote:
> >
> >> This syntax is %%pseudo-reg-name, I agree in advance with any other
> >> naming.
> >
> > For this kind of use, kprobe-tracer already provides '$' prefix :)
> > e.g. $stack, $retval etc. Please see parse_probe_vars in trace_probe.c.
> >
> > So, $current and $cpu is better for me.
>
> Agreed.
OK, thanks, I'll redo.
But I hope you will agree with overloading of FETCH_MTD_reg, I do not
want to add yet another method.
In fact I thought about $current too, and I agree it looks better. But
this conflicts with other changes I had in mind. I was going to add the
support for @symbol+%reg and +%reg(...), then add the %%percpu_shift
pseudo reg. But on a second thought this doesn't look very nice, so
lets use $name.
Oleg.
next prev parent reply other threads:[~2013-11-25 14:34 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-23 20:15 [PATCH 0/1] tracing: Introduce "pseudo registers" for FETCH_MTD_reg Oleg Nesterov
2013-11-23 20:16 ` [PATCH 1/1] " Oleg Nesterov
2013-11-24 7:32 ` Masami Hiramatsu
2013-11-25 8:04 ` Namhyung Kim
2013-11-25 14:35 ` Oleg Nesterov [this message]
2013-11-25 17:21 ` [RFC PATCH 0/3] tracing: Teach FETCH_MTD_{symbol,deref} to handle per-cpu data Oleg Nesterov
2013-11-25 17:21 ` [RFC PATCH 1/3] tracing: Don't mangle sc->addr in update_symbol_cache() Oleg Nesterov
2013-11-25 17:21 ` [RFC PATCH 2/3] tracing: introduce {calc,parse}_probe_offset() for FETCH_MTD_{symbol,deref} Oleg Nesterov
2013-11-25 17:22 ` [RFC PATCH 3/3] tracing: Teach FETCH_MTD_{symbol,deref} to handle per-cpu data Oleg Nesterov
2013-11-26 9:34 ` Masami Hiramatsu
2013-11-26 17:43 ` [RFC PATCH 0/2] tracing: Teach FETCH_MTD_symbol " Oleg Nesterov
2013-11-26 17:44 ` [RFC PATCH 1/2] tracing: Don't update sc->addr in update_symbol_cache() Oleg Nesterov
2013-11-26 17:44 ` [RFC PATCH 2/2] tracing: Teach FETCH_MTD_symbol to handle per-cpu data Oleg Nesterov
2013-11-26 17:50 ` modules, add_kallsyms() && DEFINE_PER_CPU Oleg Nesterov
2013-11-27 2:23 ` Masami Hiramatsu
2013-11-27 8:20 ` Namhyung Kim
2013-11-27 11:22 ` Masami Hiramatsu
2013-11-27 13:35 ` Oleg Nesterov
2013-11-28 2:02 ` Masami Hiramatsu
2013-11-27 11:30 ` [RFC PATCH 2/2] tracing: Teach FETCH_MTD_symbol to handle per-cpu data Masami Hiramatsu
2013-11-27 0:37 ` [RFC PATCH 0/2] " Namhyung Kim
2013-11-27 10:01 ` Masami Hiramatsu
2013-11-27 17:41 ` Oleg Nesterov
2013-11-28 2:55 ` Masami Hiramatsu
2013-11-25 19:29 ` [PATCH 0/2] tracing: Add $cpu and $current probe-vars Oleg Nesterov
2013-11-25 19:29 ` [PATCH 1/2] " Oleg Nesterov
2013-11-26 2:21 ` Masami Hiramatsu
2013-11-26 17:23 ` Oleg Nesterov
2013-11-27 8:22 ` Masami Hiramatsu
2013-11-27 17:05 ` Oleg Nesterov
2013-11-28 2:51 ` Masami Hiramatsu
2013-11-25 19:30 ` [PATCH 2/2] tracing: Kill FETCH_MTD_retval, reimplement $retval via pseudo_reg_retval() Oleg Nesterov
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