linux-kernel - Re: [RFC] perf report: introduce --map-anon-mem for anon-executable-memory symbols parsing

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Date:	Fri, 19 Jun 2015 12:42:14 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	"Wangnan (F)" <wangnan0@...wei.com>
Cc:	Hou Pengyang <houpengyang@...wei.com>, acme@...nel.org,
	mingo@...hat.com, namhyung@...nel.org, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC] perf report: introduce --map-anon-mem for
 anon-executable-memory symbols parsing


* Wangnan (F) <wangnan0@...wei.com> wrote:

> On 2015/6/18 22:01, Hou Pengyang wrote:
> >This patch introduces a --map-anon-mem argument to perf report to deal
> >with anon-executable-memory symbol parsing.
> 
> --map-anon-mem is not a good name. The user defined map area list
> introduced in this patch can be used on not only anon mapping but
> also file mapping.

Yeah, so quirky options generally suck and only 0.01% of the users will use it. 
It's in a way worse than not having this code, because we'll have to maintain it, 
but it won't be used.

Is there a way to auto-detect 'executable anon mappings' (perhaps by generating an 
MMAP event with some extra bit set, or a new MMAP event?) so that it's all 
seemless?

The user should not be required to know about such details!

Thanks,

	Ingo
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