linux-kernel - Re: [PATCH 0/3] ARM: perf: allow tracing with kernel tracepoints events

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Date:	Wed, 9 Jul 2014 15:04:28 +0100
From:	Will Deacon <will.deacon@....com>
To:	Jean Pihet <jean.pihet@...aro.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	"steve.capper@...aro.org" <steve.capper@...aro.org>
Subject: Re: [PATCH 0/3] ARM: perf: allow tracing with kernel tracepoints
 events

Hi Jean,

On Mon, Jul 07, 2014 at 02:45:07PM +0100, Jean Pihet wrote:
> - Robustify the user backtrace code, as done on other architectures.
> - Provide the symbols resolution when triggering from tracepoints.
> 
> Big thanks to Steve Capper for the help in debugging and rephrasing the
> commits descriptions.
> 
> Stress tested with perf record and tracepoints triggering (-e <tracepoint>),
> with unwinding using fp (--call-graph fp) and dwarf info (--call-graph dwarf).

I've taken the first two in this series, but patch 3 still doesn't address
my concerns about saving the required register state for unwinding.

Thanks!

Will
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