linux-kernel - Re: [PATCH 1/3] perf tools: Allow vmlinux to fallback to kallsyms on NO

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Date:	Tue, 11 Nov 2014 11:27:45 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Olsa <jolsa@...hat.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	David Ahern <dsahern@...il.com>
Subject: Re: [PATCH 1/3] perf tools: Allow vmlinux to fallback to kallsyms on
 NO_LIBELF=1

On Tue, Nov 11, 2014 at 01:24:38PM +0900, Namhyung Kim wrote:
> > What I was saying, why not have a util/symbol.c change that disregards
> > all DSOs with 0 symbols in.
> 
> The util/symbol.c doesn't need this because it can handle vmlinux
> reliably.  So after reading symbol table, it'll use the dso if it
> actually contains symbols or fallback to next dso if it has 0 symbols.
> IOW it already disregards all dsos with 0 symbols in.

Well, it could not could it.. it readily proceeded with 0 symbols in my
case. It did _not_ fallback to kallsyms.
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