Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758553Ab1ELT6z (ORCPT ); Thu, 12 May 2011 15:58:55 -0400 Received: from mail-gw0-f46.google.com ([74.125.83.46]:33797 "EHLO mail-gw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757856Ab1ELT6y convert rfc822-to-8bit (ORCPT ); Thu, 12 May 2011 15:58:54 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=PF/GpHcDLhyiDbBeJSIOIMNiAj4+ah1uBX3FqbE+lxnYYUyMMEMmvJhnsxHWoqw4Q+ vXfR8ISN7MtuNpFS1oUvXZQwPewoJ14eZxtmg1nNPYffswR21RLpT69A39dc/h89LR92 29toJgCx+Fh8HFeZCjtpu77bqWVhXto9/PLgk= MIME-Version: 1.0 In-Reply-To: <20110512.150132.1679483014638599288.davem@davemloft.net> References: <20110512.140630.1779004012724490077.davem@davemloft.net> <20110512183741.GA22269@redhat.com> <20110512.150132.1679483014638599288.davem@davemloft.net> Date: Thu, 12 May 2011 22:58:53 +0300 X-Google-Sender-Auth: g3YKlp1o7Xe_WxmiDTnzg36YNYg Message-ID: Subject: Re: [BUG] perf: bogus correlation of kernel symbols From: Pekka Enberg To: David Miller Cc: davej@redhat.com, eranian@google.com, acme@redhat.com, linux-kernel@vger.kernel.org, Kees Cook , Linus Torvalds , Ingo Molnar Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1154 Lines: 29 On Thu, May 12, 2011 at 10:01 PM, David Miller wrote: > From: Dave Jones > Date: Thu, 12 May 2011 14:37:41 -0400 > >> On Thu, May 12, 2011 at 02:06:30PM -0400, David Miller wrote: >> ?> I hate this too, and I think it's absolutely rediculous. >> ?> >> ?> Also, like you, I lost an entire afternoon trying to figure out why >> ?> this started happening. >> ?> >> ?> I wish we could revert this change. >> >> At least it can be permanently disabled.. >> >> echo kernel.kptr_restrict = 0 >> /etc/sysctl.conf > > Regardless, what to do about all of the "perf is broken" reports? Lets revert the commit 9f36e2c448007b54851e7e4fa48da97d1477a175 ("printk: use %pK for /proc/kallsyms and /proc/modules"), please! I too have been wondering what's going on with perf reporting insane symbols and this should definitely not be enabled by default. Pekka -- 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/