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SubjectRe: [GIT PULL 0/5] perf/core improvements and fixes


On 10/15/2011 11:04 AM, Ingo Molnar wrote:
>
> * David Ahern <dsahern@gmail.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

>
> Thanks,
>
> Ingo


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