From: Arnaldo Carvalho de Melo <acme@redhat.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org, paulus@samba.org, hpa@zytor.com,
mingo@redhat.com, eranian@google.com, tzanussi@gmail.com,
penberg@cs.helsinki.fi, torvalds@linux-foundation.org,
efault@gmx.de, peterz@infradead.org, davej@redhat.com,
davem@davemloft.net, fweisbec@gmail.com, kees.cook@canonical.com,
tglx@linutronix.de, linux-tip-commits@vger.kernel.org
Subject: Re: [tip:perf/urgent] perf symbols: Handle /proc/sys/kernel/kptr_restrict
Date: Thu, 26 May 2011 18:30:58 -0300 [thread overview]
Message-ID: <20110526213058.GC30593@ghostprotocols.net> (raw)
In-Reply-To: <20110526193946.GA6363@elte.hu>
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
next prev parent reply other threads:[~2011-05-26 21:31 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-26 19:21 [tip:perf/urgent] perf symbols: Handle /proc/sys/kernel/kptr_restrict tip-bot for Arnaldo Carvalho de Melo
2011-05-26 19:39 ` Ingo Molnar
2011-05-26 21:20 ` Arnaldo Carvalho de Melo
2011-05-27 8:38 ` Ingo Molnar
2011-05-26 21:28 ` Arnaldo Carvalho de Melo
2011-05-27 8:35 ` Ingo Molnar
2011-05-27 15:46 ` Linus Torvalds
2011-05-27 15:57 ` Arnaldo Carvalho de Melo
2011-05-26 21:30 ` Arnaldo Carvalho de Melo [this message]
2011-05-27 8:42 ` Ingo Molnar
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