linux-kernel - Re: [perf] Finding uninstalled modules Was Re: mailing list for trace users

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Message-ID: <4AB9DCC8.5050603@redhat.com>
Date:	Wed, 23 Sep 2009 11:31:04 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>
CC:	Mike Galbraith <efault@....de>, rostedt@...dmis.org,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Masami Hiramatsu <mhiramat@...hat.com>
Subject: Re: [perf] Finding uninstalled modules Was Re: mailing list for trace
 users

On 09/22/2009 11:17 PM, Arnaldo Carvalho de Melo wrote:
>
>> $ perf annotate -v -v -k ~avi/kvm/linux-2.6/vmlinux -m vmx_vcpu_run  |
>>      
> Here is the problem, he is passing a vmlinux, that way we don't parse
> /proc/kallsyms, so no module symbols, he uses -m to load the modules
> symbols but mod_dso__load_module_paths only looks at /lib/modules/, i.e.
> installed modules.
>
> I guess Avi hasn't installed modules, right? So the right fix for this
> case is to figure out where modules are from the path given to -k, i.e.
> we first use ~avi/kvm/linux-2.6/ as the modules path prefix and then
> fallback to /lib/modules if we can't find modules there, right?
>    

Modules were installed (I always load them with modprobe).  It's 
possible that the installed modules were a later version than the loaded 
modules, but Mike's reply leads me to believe there was a real bug there.

-- 
error compiling committee.c: too many arguments to function

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