From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp04.au.ibm.com (e23smtp04.au.ibm.com [202.81.31.146]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp04.au.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id B09BB2C07DC for ; Sun, 23 Jun 2013 23:43:03 +1000 (EST) Received: from /spool/local by e23smtp04.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Sun, 23 Jun 2013 23:28:38 +1000 Received: from d23relay05.au.ibm.com (d23relay05.au.ibm.com [9.190.235.152]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id 38F6D2BB0052 for ; Sun, 23 Jun 2013 23:43:00 +1000 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay05.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r5NDS38a6619350 for ; Sun, 23 Jun 2013 23:28:04 +1000 Received: from d23av01.au.ibm.com (loopback [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r5NDgvi4028242 for ; Sun, 23 Jun 2013 23:42:59 +1000 From: "Srivatsa S. 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 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> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Cc: linux-arch@vger.kernel.org, Michel Lespinasse , Catalin Marinas , nikunj@linux.vnet.ibm.com, zhong@linux.vnet.ibm.com, linux-pm@vger.kernel.org, fweisbec@gmail.com, linux-kernel@vger.kernel.org, rostedt@goodmis.org, xiaoguangrong@linux.vnet.ibm.com, sbw@mit.edu, Akinobu Mita , wangyun@linux.vnet.ibm.com, srivatsa.bhat@linux.vnet.ibm.com, netdev@vger.kernel.org, Andrew Morton , "Paul E. McKenney" , linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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(+) 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