From mboxrd@z Thu Jan  1 00:00:00 1970
From: Francis Moreau <francis.moro@gmail.com>
Subject: Re: perf-probe: issue with latest fedora kernel
Date: Mon, 13 Dec 2010 14:08:56 +0100
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In-Reply-To: <20101213125837.GB5407@ghostprotocols.net> (Arnaldo Carvalho de
	Melo's message of "Mon, 13 Dec 2010 10:58:37 -0200")
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To: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: linux-perf-users@vger.kernel.org, Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>

Arnaldo Carvalho de Melo <acme@ghostprotocols.net> writes:

> Em Mon, Dec 13, 2010 at 11:02:52AM +0100, Francis Moreau escreveu:
>> Arnaldo Carvalho de Melo <acme@ghostprotocols.net> writes:
>> > Em Thu, Dec 09, 2010 at 04:00:08PM +0100, Francis Moreau escreveu:
>> >> I'm trying to use perf-probe(1) with the latest F14 kernel
>> >> (2.6.35.9-64.fc14.x86_64).
>
>> >> I also installed kernel-debug-debuginfo-2.6.35.9-64.fc14.x86_64 which
>> >> contains the running vmlinux image AFAICT.
>
>> > Can you try using:
>
>> > $ perf probe -k /usr/lib/debug/lib/modules/2.6.35.9-64.fc14.x86_64.debug/vmlinux <rest of the probe definition>
>
>> > So that it tries it directly instead of looking into the buildid cache?
>
>> Does anybody know where I can report this issue to Fedora community ?
>
> Please create a ticket at:
>
> http://bugzilla.redhat.com
>
> More specifically:
>
> https://bugzilla.redhat.com/enter_bug.cgi?product=Fedora
>
> Mention this changeset:
>
> http://git.kernel.org/?p=linux/kernel/git/acme/linux-2.6.git;a=commit;h=34d2ea084a3bce03d73ffe64350db2813f07260c
>
> It will make the -k argument work.
>
> There is another that will look automatically at this location, but I
> haven't merged yet, will post here when done.

Hmm, I don't think that any patches recently posted in response of this
thread will solve the problem.

The primarily concern here, is that the running kernel has a different
build-id than the debug image installed by the corresponding debug
package.

I think it's a distrib issue, hence my question about Fedora report.

Thanks
-- 
Francis