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SubjectRe: [tip:perf/urgent] perf symbols: Handle /proc/sys/kernel/kptr_restrict
Em Thu, May 26, 2011 at 09:39:46PM +0200, Ingo Molnar escreveu:
>
> * tip-bot for Arnaldo Carvalho de Melo <acme@redhat.com> wrote:
>
> > Commit-ID: ec80fde746e3ccf93895d25ae1a7071c9af52585
> > Gitweb: http://git.kernel.org/tip/ec80fde746e3ccf93895d25ae1a7071c9af52585
> > Author: Arnaldo Carvalho de Melo <acme@redhat.com>
> > AuthorDate: Thu, 26 May 2011 09:53:51 -0300
> > Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
> > CommitDate: Thu, 26 May 2011 11:15:25 -0300
> >
> > perf symbols: Handle /proc/sys/kernel/kptr_restrict
>
> Ok, things are much better now with kptr_restrict turned on - but i
> still see a few rough edges in practice.
>
> For example 'perf top' says:
>
> aldebaran:~/linux> perf top
> [kernel.kallsyms] with build id 122214021a666675f6e5ff97d70a85ce7139c0e7 not found, continuing without symbols
> The (null) file can't be used
>
> Now we've confused the user, havent we? :-)

The ones that do:

# echo -1 > /proc/sys/kernel/perf_event_paranoid
Right?

Trying that, not usually something I do :)

- Arnaldo


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