From patchwork Sun Jun 23 13:39:31 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Srivatsa S. Bhat" X-Patchwork-Id: 2767321 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A54AC9F245 for ; Sun, 23 Jun 2013 13:43:27 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D008A20120 for ; Sun, 23 Jun 2013 13:43:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DE5682011F for ; Sun, 23 Jun 2013 13:43:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751838Ab3FWNnI (ORCPT ); Sun, 23 Jun 2013 09:43:08 -0400 Received: from e23smtp01.au.ibm.com ([202.81.31.143]:56258 "EHLO e23smtp01.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751211Ab3FWNnF (ORCPT ); Sun, 23 Jun 2013 09:43:05 -0400 Received: from /spool/local by e23smtp01.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Bhat" Subject: [PATCH 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 Date: Sun, 23 Jun 2013 19:09:31 +0530 Message-ID: <20130623133928.19094.8259.stgit@srivatsabhat.in.ibm.com> In-Reply-To: <20130623133642.19094.16038.stgit@srivatsabhat.in.ibm.com> References: <20130623133642.19094.16038.stgit@srivatsabhat.in.ibm.com> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13062313-1618-0000-0000-00000421F14D Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-8.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Signed-off-by: Srivatsa S. Bhat --- lib/Kconfig.debug | 9 +++++++++ 1 file changed, 9 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 566cf2b..6be1e72 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -512,6 +512,15 @@ 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 + default n + 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