linux-kernel - Re: [GIT PULL 0/5] perf/core improvements and fixes

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Message-ID: <20111015190620.GA21352@ghostprotocols.net>
Date:	Sat, 15 Oct 2011 16:06:20 -0300
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	David Ahern <dsahern@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	Thomas Jarosch <thomas.jarosch@...ra2net.com>
Subject: Re: [GIT PULL 0/5] perf/core improvements and fixes

Em Sat, Oct 15, 2011 at 11:46:14AM -0600, David Ahern escreveu:
> 
> 
> On 10/15/2011 11:04 AM, Ingo Molnar wrote:
> > 
> > * David Ahern <dsahern@...il.com> wrote:
> > 
> >> On 10/15/2011 08:59 AM, Ingo Molnar wrote:
> >>> Btw., i noticed another weirdness - sometimes after startup i get 
> >>> this message:
> >>>
> >>> /lib64/libc-2.14.90.so was updated, restart the long running apps that use it!                          
> >>>
> >>> but it was not updated recently:
> >>>
> >>>  earth5:~/tip/tools/perf> ll /lib64/libc-2.14.90.so
> >>>  -rwxr-xr-x 1 root root 2062920 Sep 28 15:11 /lib64/libc-2.14.90.so
> >>>  earth5:~/tip/tools/perf> date
> >>>  Sat Oct 15 16:59:04 CEST 2011
> >>>  earth5:~/tip/tools/perf> uptime
> >>>   16:59:08 up 19 days, 21:35, 11 users,  load average: 7.77, 7.48, 3.81
> >>
> >> I got the impression that comment was relative to when the 
> >> processes were started versus prelink touching it. In your case the 
> >> mod time of libc is after the uptime of the box.
> > 
> > Ok, that makes sense. Do we report this in perf report output as 
> > well?
> 
> It should. The message comes from map__load() when it detects a deleted
> mapping such as:
> 
> 7f9e8d5c7000-7f9e8d5c8000 rw-p 0000c000 fd:02 1046947
>  /lib64/libpam.so.0.82.2.#prelink#.cM3f72 (deleted)
> 
> I have removed prelink from most of my systems (managed to find one lone
> server with the above).

David,

	Can you send me a patch that clarifies this situation?

- Arnaldo
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