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Date: Mon, 25 Nov 2013 17:04:47 +0900 From: Namhyung Kim <namhyung@...nel.org> To: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> Cc: Oleg Nesterov <oleg@...hat.com>, Steven Rostedt <rostedt@...dmis.org>, Namhyung Kim <namhyung.kim@....com>, Frederic Weisbecker <fweisbec@...il.com>, Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/1] tracing: Introduce "pseudo registers" for FETCH_MTD_reg On Sun, 24 Nov 2013 16:32:53 +0900, Masami Hiramatsu wrote: > (2013/11/24 5:16), Oleg Nesterov wrote: >> The probe can dump the registers or memory, but it is not possible >> to dump, say, current->pid. This patch adds the pseudo regs table, >> currently it has only two methods to get current/smp_processor_id >> but it can be trivially extended. > > Good catch! :) > >> 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. Thanks, Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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