Re: [PATCH 1/1] tracing: Introduce "pseudo registers" for FETCH_MTD_reg

[Namhyung Kim]

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
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