From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758922AbcHDSlW (ORCPT ); Thu, 4 Aug 2016 14:41:22 -0400 Received: from out02.mta.xmission.com ([166.70.13.232]:50922 "EHLO out02.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753657AbcHDSlV (ORCPT ); Thu, 4 Aug 2016 14:41:21 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: Aravinda Prasad Cc: Hari Bathini , daniel@iogearbox.net, peterz@infradead.org, linux-kernel@vger.kernel.org, acme@kernel.org, alexander.shishkin@linux.intel.com, mingo@redhat.com, paulus@samba.org, kernel@kyup.com, rostedt@goodmis.org, viro@zeniv.linux.org.uk, ananth@in.ibm.com, Linux Containers References: <146965470618.23765.7329786743211962695.stgit@hbathini.in.ibm.com> <87twf1ck95.fsf@x220.int.ebiederm.org> <57A355C1.4090004@linux.vnet.ibm.com> Date: Thu, 04 Aug 2016 13:27:49 -0500 In-Reply-To: <57A355C1.4090004@linux.vnet.ibm.com> (Aravinda Prasad's message of "Thu, 4 Aug 2016 20:18:33 +0530") Message-ID: <87h9b01ja2.fsf@x220.int.ebiederm.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-XM-SPF: eid=1bVNZi-00045k-9h;;;mid=<87h9b01ja2.fsf@x220.int.ebiederm.org>;;;hst=in02.mta.xmission.com;;;ip=67.3.204.119;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX19Y9XpJhVyFxzlj7LeSz18TNGGM19UBaws= X-SA-Exim-Connect-IP: 67.3.204.119 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.0 TVD_RCVD_IP Message was received from an IP address * 0.7 XMSubLong Long Subject * 0.0 T_TM2_M_HEADER_IN_MSG BODY: No description available. * 0.8 BAYES_50 BODY: Bayes spam probability is 40 to 60% * [score: 0.4999] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa07 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 T_TooManySym_01 4+ unique symbols in subject X-Spam-DCC: XMission; sa07 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Aravinda Prasad X-Spam-Relay-Country: X-Spam-Timing: total 248 ms - load_scoreonly_sql: 0.05 (0.0%), signal_user_changed: 13 (5.1%), b_tie_ro: 10 (4.2%), parse: 0.72 (0.3%), extract_message_metadata: 2.6 (1.0%), get_uri_detail_list: 0.98 (0.4%), tests_pri_-1000: 3.8 (1.5%), tests_pri_-950: 1.28 (0.5%), tests_pri_-900: 1.08 (0.4%), tests_pri_-400: 21 (8.4%), check_bayes: 20 (8.0%), b_tokenize: 5 (2.2%), b_tok_get_all: 7 (2.6%), b_comp_prob: 1.80 (0.7%), b_tok_touch_all: 3.3 (1.3%), b_finish: 0.72 (0.3%), tests_pri_0: 191 (76.9%), check_dkim_signature: 0.51 (0.2%), check_dkim_adsp: 4.3 (1.7%), tests_pri_500: 4.9 (2.0%), rewrite_mail: 0.00 (0.0%) Subject: Re: [RFC PATCH v2 0/3] perf/tracefs: Container-aware tracing support X-Spam-Flag: No X-SA-Exim-Version: 4.2.1 (built Thu, 05 May 2016 13:38:54 -0600) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Aravinda Prasad writes: > On Thursday 04 August 2016 08:29 AM, Eric W. Biederman wrote: >> Hari Bathini writes: >> >>> This RFC patch set supports filtering container specific events >>> when perf tool is executed inside a container. The patches apply >>> cleanly on v4.7.0-rc7 >>> >>> Changes from v1: >>> 1/3. Revived earlier approach[1] with cgroup namespace instead >>> of pid namespace >>> 2/3. New patch that adds instance support for uprobe events in >>> tracefs filesystem >>> 3/3. New patch that adds "newinstance" mount option for tracefs >>> filesystem >> "newinstace" ick no. >> >> I see no justification anywhere why the perf cgroup is not enough for >> this. > > perf cgroup is not enough for uprobes, because even with perf cgroups a > user within a container can still list/delete uprobes registered in > other containers. Just to be clear, even if there is one cgroup per container? Eric