[PATCH v3 1/2] powerpc/xmon: Dump ftrace buffers for the current CPU only

[Michael Ellerman]

Breno Leitao <leitao at debian.org> writes:

> Current xmon 'dt' command dumps the tracing buffer for all the CPUs,
> which makes it very hard to read due to the fact that most of
> powerpc machines currently have many CPUs.

> Other than that, the CPU
> lines are interleaved in the ftrace log.

That's because they're ordered by time. And the CPU number is included
in each line.

> This new option just dumps the ftrace buffer for the current CPU.

This is still a good idea though :)

> diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
> index 08e367e3e8c3..e0522f60f0ee 100644
> --- a/arch/powerpc/xmon/xmon.c
> +++ b/arch/powerpc/xmon/xmon.c
> @@ -234,6 +234,7 @@ Commands:\n\
>    "\
>    dr	dump stream of raw bytes\n\
>    dt	dump the tracing buffers (uses printk)\n\
> +  dtc	dump the tracing buffers for current CPU (uses printk)\n\

Hopefully people won't be disappointed that this doesn't invoke dtc
(Device Tree Compiler) in xmon :P

cheers