From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Milian Wolff <milian.wolff@kdab.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: perf trace: Problems initializing symbol libraries!
Date: Thu, 12 May 2016 15:10:44 -0300 [thread overview]
Message-ID: <20160512181044.GK20258@kernel.org> (raw)
In-Reply-To: <2323271.hRPH2PSKxc@milian-kdab2>
Em Thu, May 12, 2016 at 02:05:35PM +0200, Milian Wolff escreveu:
> I'm getting the following error when trying to run `perf trace` built from
> acme's perf/core branch on an Ubuntu 16.04 machine:
> $ perf trace
> Problems initializing symbol libraries!
> strace shows this at the end:
> ...
> lstat("/proc", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
> lstat("/proc/kallsyms", {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
> write(2, "Problems initializing symbol lib"..., 40Problems initializing symbol
> libraries!
> ) = 40
> exit_group(244)
> Is something wrong with my /proc/kallsyms? Can someone tell me what the
> problems are that are being encountered?
Does it work as root?
What is the value of /proc/sys/kernel/kptr_restrict?
Need to improve that message :-\
- Arnaldo
next prev parent reply other threads:[~2016-05-12 18:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-12 12:05 perf trace: Problems initializing symbol libraries! Milian Wolff
2016-05-12 18:10 ` Arnaldo Carvalho de Melo [this message]
2016-05-16 11:31 ` Milian Wolff
2016-05-16 13:15 ` Arnaldo Carvalho de Melo
2016-05-16 20:13 ` Arnaldo Carvalho de Melo
2016-05-17 7:51 ` Milian Wolff
2016-05-17 15:06 ` Arnaldo Carvalho de Melo
2016-05-23 10:05 ` Milian Wolff
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