From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932457AbcHKOMR (ORCPT ); Thu, 11 Aug 2016 10:12:17 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:48030 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750882AbcHKOLt (ORCPT ); Thu, 11 Aug 2016 10:11:49 -0400 Subject: Re: [tip:smp/hotplug] cpu/hotplug: Prevent alloc/free of irq descriptors during CPU up/down (again) To: Sebastian Andrzej Siewior References: <1470244948-17674-3-git-send-email-boris.ostrovsky@oracle.com> <287b42da-0388-f43e-34f7-a90935c33fa9@oracle.com> <20160811132020.bkdneatkijy7qxal@linutronix.de> Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de, jgross@suse.com, torvalds@linux-foundation.org, mingo@kernel.org, hpa@zytor.com, peterz@infradead.org, anna-maria@linutronix.de, linux-tip-commits@vger.kernel.org From: Boris Ostrovsky Message-ID: Date: Thu, 11 Aug 2016 10:11:20 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <20160811132020.bkdneatkijy7qxal@linutronix.de> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/11/2016 09:20 AM, Sebastian Andrzej Siewior wrote: > On 2016-08-11 08:53:31 [-0400], Boris Ostrovsky wrote: >> Since this patch requires >> http://marc.info/?l=xen-devel&m=147024499722041&w=2 it may be better to >> take it via Xen tree. > > Why are you adding more register_cpu_notifier() users? Are you asking why this is not using new hotplug infrastructure? This should indeed be done but not as part of this series. Here we are solving a specific problem and part of this is allowing PV guests use the same notifier that HVM guests already do. -boris