From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp08.au.ibm.com (e23smtp08.au.ibm.com [202.81.31.141]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp08.au.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id EA9BB2C0091 for ; Mon, 24 Jun 2013 05:00:01 +1000 (EST) Received: from /spool/local by e23smtp08.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 24 Jun 2013 04:57:16 +1000 Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [9.190.235.21]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id 801B62BB0052 for ; Mon, 24 Jun 2013 04:59:59 +1000 (EST) Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r5NIxoYp6554038 for ; Mon, 24 Jun 2013 04:59:50 +1000 Received: from d23av03.au.ibm.com (loopback [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r5NIxvDt007391 for ; Mon, 24 Jun 2013 04:59:59 +1000 Message-ID: <51C744E6.1040905@linux.vnet.ibm.com> Date: Mon, 24 Jun 2013 00:26:38 +0530 From: "Srivatsa S. Bhat" MIME-Version: 1.0 To: Matt Turner Subject: Re: [PATCH 31/45] alpha/smp: Use get/put_online_cpus_atomic() to prevent CPU offline References: <20130623133642.19094.16038.stgit@srivatsabhat.in.ibm.com> <20130623134516.19094.57189.stgit@srivatsabhat.in.ibm.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Cc: peterz@infradead.org, fweisbec@gmail.com, linux-kernel@vger.kernel.org, walken@google.com, mingo@kernel.org, linux-arch@vger.kernel.org, vincent.guittot@linaro.org, xiaoguangrong@linux.vnet.ibm.com, wangyun@linux.vnet.ibm.com, paulmck@linux.vnet.ibm.com, nikunj@linux.vnet.ibm.com, linux-pm@vger.kernel.org, rusty@rustcorp.com.au, rostedt@goodmis.org, Ivan Kokshaysky , namhyung@kernel.org, tglx@linutronix.de, Richard Henderson , laijs@cn.fujitsu.com, zhong@linux.vnet.ibm.com, netdev@vger.kernel.org, oleg@redhat.com, sbw@mit.edu, linux-alpha@vger.kernel.org, tj@kernel.org, akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 06/23/2013 11:20 PM, Matt Turner wrote: > On Sun, Jun 23, 2013 at 6:45 AM, Srivatsa S. Bhat > wrote: >> Once stop_machine() is gone from the CPU offline path, we won't be able >> to depend on disabling preemption to prevent CPUs from going offline >> from under us. >> >> Use the get/put_online_cpus_atomic() APIs to prevent CPUs from going >> offline, while invoking from atomic context. >> >> Also, remove the non-ASCII character present in this file! > > It's not non-ASCII. It's a page break. > Oh, ok.. Regards, Srivatsa S. Bhat