From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753065Ab3FYUaQ (ORCPT ); Tue, 25 Jun 2013 16:30:16 -0400 Received: from e28smtp02.in.ibm.com ([122.248.162.2]:47081 "EHLO e28smtp02.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752896Ab3FYUaM (ORCPT ); Tue, 25 Jun 2013 16:30:12 -0400 From: "Srivatsa S. Bhat" Subject: [PATCH v2 07/45] CPU hotplug: Expose the new debug config option To: tglx@linutronix.de, peterz@infradead.org, tj@kernel.org, oleg@redhat.com, paulmck@linux.vnet.ibm.com, rusty@rustcorp.com.au, mingo@kernel.org, akpm@linux-foundation.org, namhyung@kernel.org, walken@google.com, vincent.guittot@linaro.org, laijs@cn.fujitsu.com Cc: rostedt@goodmis.org, wangyun@linux.vnet.ibm.com, xiaoguangrong@linux.vnet.ibm.com, sbw@mit.edu, fweisbec@gmail.com, zhong@linux.vnet.ibm.com, nikunj@linux.vnet.ibm.com, srivatsa.bhat@linux.vnet.ibm.com, linux-pm@vger.kernel.org, linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Morton , "Paul E. McKenney" , Akinobu Mita , Catalin Marinas , Michel Lespinasse , Sergei Shtylyov , "Srivatsa S. Bhat" Date: Wed, 26 Jun 2013 01:56:49 +0530 Message-ID: <20130625202648.16593.89461.stgit@srivatsabhat.in.ibm.com> In-Reply-To: <20130625202452.16593.22810.stgit@srivatsabhat.in.ibm.com> References: <20130625202452.16593.22810.stgit@srivatsabhat.in.ibm.com> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13062520-5816-0000-0000-000008A083FD Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that we have all the pieces of the CPU hotplug debug infrastructure in place, expose the feature by growing a new Kconfig option, CONFIG_DEBUG_HOTPLUG_CPU. Cc: Andrew Morton Cc: "Paul E. McKenney" Cc: Akinobu Mita Cc: Catalin Marinas Cc: Michel Lespinasse Cc: Sergei Shtylyov Signed-off-by: Srivatsa S. Bhat --- lib/Kconfig.debug | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 566cf2b..ec6be74 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -512,6 +512,14 @@ config DEBUG_PREEMPT if kernel code uses it in a preemption-unsafe way. Also, the kernel will detect preemption count underflows. +config DEBUG_HOTPLUG_CPU + bool "Debug CPU hotplug" + depends on HOTPLUG_CPU + help + If you say Y here, the kernel will check all the accesses of + cpu_online_mask from atomic contexts, and will print warnings if + the task lacks appropriate synchronization with CPU hotplug. + config DEBUG_RT_MUTEXES bool "RT Mutex debugging, deadlock detection" depends on DEBUG_KERNEL && RT_MUTEXES