Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758534Ab1EZVbi (ORCPT ); Thu, 26 May 2011 17:31:38 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39072 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755767Ab1EZVbh (ORCPT ); Thu, 26 May 2011 17:31:37 -0400 Date: Thu, 26 May 2011 18:30:58 -0300 From: Arnaldo Carvalho de Melo To: Ingo Molnar 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 Message-ID: <20110526213058.GC30593@ghostprotocols.net> References: <20110526193946.GA6363@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110526193946.GA6363@elte.hu> X-Url: http://acmel.wordpress.com User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1312 Lines: 38 Em Thu, May 26, 2011 at 09:39:46PM +0200, Ingo Molnar escreveu: > > * tip-bot for Arnaldo Carvalho de Melo wrote: > > > Commit-ID: ec80fde746e3ccf93895d25ae1a7071c9af52585 > > Gitweb: http://git.kernel.org/tip/ec80fde746e3ccf93895d25ae1a7071c9af52585 > > Author: Arnaldo Carvalho de Melo > > AuthorDate: Thu, 26 May 2011 09:53:51 -0300 > > Committer: Arnaldo Carvalho de Melo > > 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/