From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Srivatsa S. Bhat" Subject: Re: [PATCH 31/45] alpha/smp: Use get/put_online_cpus_atomic() to prevent CPU offline Date: Mon, 24 Jun 2013 00:26:38 +0530 Message-ID: <51C744E6.1040905@linux.vnet.ibm.com> References: <20130623133642.19094.16038.stgit@srivatsabhat.in.ibm.com> <20130623134516.19094.57189.stgit@srivatsabhat.in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: 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, 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, linux-pm@vger.kernel.org, linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Richard Henderson , Ivan Kokshaysky , linux-alpha@vger.kernel.org To: Matt Turner Return-path: In-Reply-To: Sender: linux-arch-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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