linux-kernel - Re: [GIT PULL] perf changes for v3.12

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Message-ID: <20130905133836.GA26634@gmail.com>
Date:	Thu, 5 Sep 2013 15:38:36 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] perf changes for v3.12


* Ingo Molnar <mingo@...nel.org> wrote:

>    * 'perf report/top' enhancements:
> 
>         . Do annotation using /proc/kcore and /proc/kallsyms when 
>           available, removing the forced need for a vmlinux file kernel 
>           assembly annotation. This also improves this use case because 
>           vmlinux has just the initial kernel image, not what is actually 
>           in use after various code patchings by things like alternatives.
>           By Adrian Hunter.

Btw., this new feature is most noticeable if you run 'perf top' as root on 
any random box: you can annotate based on the live kernel image straight 
away, without having the vmlinux.

This works on various distro kernels as well.

Thanks,

	Ingo
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