From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965767AbdEOPV0 (ORCPT ); Mon, 15 May 2017 11:21:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:33296 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965905AbdEOPVY (ORCPT ); Mon, 15 May 2017 11:21:24 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E6BE239BE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=rostedt@goodmis.org Date: Mon, 15 May 2017 11:21:15 -0400 From: Steven Rostedt To: "Naveen N. Rao" Cc: Shuah Khan , Michael Ellerman , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Masami Hiramatsu Subject: Re: [PATCH 2/4] ftrace/instances: Clear function triggers when removing instances Message-ID: <20170515112115.36825c24@gandalf.local.home> In-Reply-To: <437c3409d58c2ab065233df57d82425a90c5e9e1.1494702964.git.naveen.n.rao@linux.vnet.ibm.com> References: <437c3409d58c2ab065233df57d82425a90c5e9e1.1494702964.git.naveen.n.rao@linux.vnet.ibm.com> X-Mailer: Claws Mail 3.14.0 (GTK+ 2.24.31; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 14 May 2017 01:01:02 +0530 "Naveen N. Rao" wrote: > If instance directories are deleted while there are registered function > triggers: > > # cd /sys/kernel/debug/tracing/instances > # mkdir test > # echo "schedule:enable_event:sched:sched_switch" > test/set_ftrace_filter > # rmdir test > Unable to handle kernel paging request for data at address 0x00000008 > Unable to handle kernel paging request for data at address 0x00000008 > Faulting instruction address: 0xc0000000021edde8 > Oops: Kernel access of bad area, sig: 11 [#1] > SMP NR_CPUS=2048 > NUMA > pSeries Looks like this patch needs to be marked for stable, and go in right away. I may also do the same for the ftracetest bashism patch with Masami's approval. I may also slip in the ftracetest for the bug that this patch fixes. The first patch can go into the queue for 4.13. -- Steve