From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759679Ab3BYVaS (ORCPT ); Mon, 25 Feb 2013 16:30:18 -0500 Received: from ozlabs.org ([203.10.76.45]:56351 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756928Ab3BYVaK (ORCPT ); Mon, 25 Feb 2013 16:30:10 -0500 From: Rusty Russell To: "Srivatsa S. Bhat" , tglx@linutronix.de, peterz@infradead.org, tj@kernel.org, oleg@redhat.com, paulmck@linux.vnet.ibm.com, mingo@kernel.org, akpm@linux-foundation.org, namhyung@kernel.org Cc: rostedt@goodmis.org, wangyun@linux.vnet.ibm.com, xiaoguangrong@linux.vnet.ibm.com, rjw@sisk.pl, sbw@mit.edu, fweisbec@gmail.com, linux@arm.linux.org.uk, nikunj@linux.vnet.ibm.com, srivatsa.bhat@linux.vnet.ibm.com, linux-pm@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, walken@google.com, vincent.guittot@linaro.org Subject: Re: [PATCH v6 00/46] CPU hotplug: stop_machine()-free CPU hotplug In-Reply-To: <20130218123714.26245.61816.stgit@srivatsabhat.in.ibm.com> References: <20130218123714.26245.61816.stgit@srivatsabhat.in.ibm.com> User-Agent: Notmuch/0.14 (http://notmuchmail.org) Emacs/23.4.1 (i686-pc-linux-gnu) Date: Fri, 22 Feb 2013 11:01:46 +1030 Message-ID: <87mwuxfatp.fsf@rustcorp.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "Srivatsa S. Bhat" writes: > Hi, > > This patchset removes CPU hotplug's dependence on stop_machine() from the CPU > offline path and provides an alternative (set of APIs) to preempt_disable() to > prevent CPUs from going offline, which can be invoked from atomic context. > The motivation behind the removal of stop_machine() is to avoid its ill-effects > and thus improve the design of CPU hotplug. (More description regarding this > is available in the patches). If you're doing a v7, please put your benchmark results somewhere! The obvious place is in the 44/46. Thanks, Rusty. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rusty Russell Subject: Re: [PATCH v6 00/46] CPU hotplug: stop_machine()-free CPU hotplug Date: Fri, 22 Feb 2013 11:01:46 +1030 Message-ID: <87mwuxfatp.fsf@rustcorp.com.au> References: <20130218123714.26245.61816.stgit@srivatsabhat.in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: <20130218123714.26245.61816.stgit@srivatsabhat.in.ibm.com> Sender: linux-doc-owner@vger.kernel.org To: tglx@linutronix.de, peterz@infradead.org, tj@kernel.org, oleg@redhat.com, paulmck@linux.vnet.ibm.com, mingo@kernel.org, akpm@linux-foundation.org, namhyung@kernel.org Cc: rostedt@goodmis.org, wangyun@linux.vnet.ibm.com, xiaoguangrong@linux.vnet.ibm.com, rjw@sisk.pl, sbw@mit.edu, fweisbec@gmail.com, linux@arm.linux.org.uk, nikunj@linux.vnet.ibm.com, srivatsa.bhat@linux.vnet.ibm.com, linux-pm@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, walken@google.com, vincent.guittot@linaro.org List-Id: linux-arch.vger.kernel.org "Srivatsa S. Bhat" writes: > Hi, > > This patchset removes CPU hotplug's dependence on stop_machine() from the CPU > offline path and provides an alternative (set of APIs) to preempt_disable() to > prevent CPUs from going offline, which can be invoked from atomic context. > The motivation behind the removal of stop_machine() is to avoid its ill-effects > and thus improve the design of CPU hotplug. (More description regarding this > is available in the patches). If you're doing a v7, please put your benchmark results somewhere! The obvious place is in the 44/46. Thanks, Rusty. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org ([203.10.76.45]:56351 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756928Ab3BYVaK (ORCPT ); Mon, 25 Feb 2013 16:30:10 -0500 From: Rusty Russell Subject: Re: [PATCH v6 00/46] CPU hotplug: stop_machine()-free CPU hotplug In-Reply-To: <20130218123714.26245.61816.stgit@srivatsabhat.in.ibm.com> References: <20130218123714.26245.61816.stgit@srivatsabhat.in.ibm.com> Date: Fri, 22 Feb 2013 11:01:46 +1030 Message-ID: <87mwuxfatp.fsf@rustcorp.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-arch-owner@vger.kernel.org List-ID: To: "Srivatsa S. Bhat" , tglx@linutronix.de, peterz@infradead.org, tj@kernel.org, oleg@redhat.com, paulmck@linux.vnet.ibm.com, mingo@kernel.org, akpm@linux-foundation.org, namhyung@kernel.org Cc: rostedt@goodmis.org, wangyun@linux.vnet.ibm.com, xiaoguangrong@linux.vnet.ibm.com, rjw@sisk.pl, sbw@mit.edu, fweisbec@gmail.com, linux@arm.linux.org.uk, nikunj@linux.vnet.ibm.com, linux-pm@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, walken@google.com, vincent.guittot@linaro.org Message-ID: <20130222003146.uOulnh9yALCs3ouEZBG646CS8h9ZX4DY-uy4PF0oMJw@z> "Srivatsa S. Bhat" writes: > Hi, > > This patchset removes CPU hotplug's dependence on stop_machine() from the CPU > offline path and provides an alternative (set of APIs) to preempt_disable() to > prevent CPUs from going offline, which can be invoked from atomic context. > The motivation behind the removal of stop_machine() is to avoid its ill-effects > and thus improve the design of CPU hotplug. (More description regarding this > is available in the patches). If you're doing a v7, please put your benchmark results somewhere! The obvious place is in the 44/46. Thanks, Rusty. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Rusty Russell To: "Srivatsa S. Bhat" , tglx@linutronix.de, peterz@infradead.org, tj@kernel.org, oleg@redhat.com, paulmck@linux.vnet.ibm.com, mingo@kernel.org, akpm@linux-foundation.org, namhyung@kernel.org Subject: Re: [PATCH v6 00/46] CPU hotplug: stop_machine()-free CPU hotplug In-Reply-To: <20130218123714.26245.61816.stgit@srivatsabhat.in.ibm.com> References: <20130218123714.26245.61816.stgit@srivatsabhat.in.ibm.com> Date: Fri, 22 Feb 2013 11:01:46 +1030 Message-ID: <87mwuxfatp.fsf@rustcorp.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-arch@vger.kernel.org, linux@arm.linux.org.uk, nikunj@linux.vnet.ibm.com, linux-pm@vger.kernel.org, fweisbec@gmail.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, rostedt@goodmis.org, xiaoguangrong@linux.vnet.ibm.com, rjw@sisk.pl, sbw@mit.edu, wangyun@linux.vnet.ibm.com, srivatsa.bhat@linux.vnet.ibm.com, netdev@vger.kernel.org, vincent.guittot@linaro.org, walken@google.com, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , "Srivatsa S. Bhat" writes: > Hi, > > This patchset removes CPU hotplug's dependence on stop_machine() from the CPU > offline path and provides an alternative (set of APIs) to preempt_disable() to > prevent CPUs from going offline, which can be invoked from atomic context. > The motivation behind the removal of stop_machine() is to avoid its ill-effects > and thus improve the design of CPU hotplug. (More description regarding this > is available in the patches). If you're doing a v7, please put your benchmark results somewhere! The obvious place is in the 44/46. Thanks, Rusty. From mboxrd@z Thu Jan 1 00:00:00 1970 From: rusty@rustcorp.com.au (Rusty Russell) Date: Fri, 22 Feb 2013 11:01:46 +1030 Subject: [PATCH v6 00/46] CPU hotplug: stop_machine()-free CPU hotplug In-Reply-To: <20130218123714.26245.61816.stgit@srivatsabhat.in.ibm.com> References: <20130218123714.26245.61816.stgit@srivatsabhat.in.ibm.com> Message-ID: <87mwuxfatp.fsf@rustcorp.com.au> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org "Srivatsa S. Bhat" writes: > Hi, > > This patchset removes CPU hotplug's dependence on stop_machine() from the CPU > offline path and provides an alternative (set of APIs) to preempt_disable() to > prevent CPUs from going offline, which can be invoked from atomic context. > The motivation behind the removal of stop_machine() is to avoid its ill-effects > and thus improve the design of CPU hotplug. (More description regarding this > is available in the patches). If you're doing a v7, please put your benchmark results somewhere! The obvious place is in the 44/46. Thanks, Rusty.