linux-kernel - Re: [RFC 2/3] arm64: refactor save_stack

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Message-Id: <24AFDCDB-55DE-4A23-A26A-750B48AC365C@gmail.com>
Date:	Tue, 4 Aug 2015 02:22:16 +0900
From:	Jungseok Lee <jungseoklee85@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Will Deacon <will.deacon@....com>,
	Mark Rutland <Mark.Rutland@....com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	AKASHI Takahiro <takahiro.akashi@...aro.org>,
	"broonie@...nel.org" <broonie@...nel.org>,
	"david.griego@...aro.org" <david.griego@...aro.org>,
	"olof@...om.net" <olof@...om.net>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC 2/3] arm64: refactor save_stack_trace()

On Aug 4, 2015, at 1:57 AM, Steven Rostedt wrote:
> On Tue, 4 Aug 2015 01:30:50 +0900
> Jungseok Lee <jungseoklee85@...il.com> wrote:
> 
> 
>> There are two issues in the current version.
>> 1) The change does not work correctly when function_graph feature is enabled.
>> 2) Akashi have raised an issue that size field of stack tracer is inaccurate.
>> 
>> So, I think this patch set is not ready yet.
> 
> Do you still want me to add code that does:
> 
> if (*p == (stack_dump_trace[i] + FTRACE_STACK_FRAME_OFFSET)) {
> 
> ?
> 
> If you expect to need that, I can get it into the next merge window and
> you can base the code of that in the merge window after that.

It would be better to add the snippet when a new version is ready.
That way might help to figure out easily why the macro is introduced and how
it can be used in architecture code.

Best Regards
Jungseok Lee--
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