Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752772AbdFMKpI (ORCPT ); Tue, 13 Jun 2017 06:45:08 -0400 Received: from ozlabs.org ([103.22.144.67]:34925 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752081AbdFMKpH (ORCPT ); Tue, 13 Jun 2017 06:45:07 -0400 From: Michael Ellerman To: Michael Bringmann , Reza Arbab Cc: Balbir Singh , linux-kernel@vger.kernel.org, Paul Mackerras , "Aneesh Kumar K.V" , Bharata B Rao , Shailendra Singh , Thomas Gleixner , linuxppc-dev@lists.ozlabs.org, Sebastian Andrzej Siewior , Michael Bringmann from Kernel Team Subject: Re: RESEND Re: [Patch 2/2]: powerpc/hotplug/mm: Fix hot-add memory node assoc In-Reply-To: References: <3bb44d92-b2ff-e197-4bdf-ec6d588d6dab@linux.vnet.ibm.com> <20170523155251.bqwc5mc4jpgzkqlm@arbab-laptop.localdomain> <1c1d70e3-4e45-b035-0e75-1b0f531c111b@linux.vnet.ibm.com> <20170523214922.bns675oqzqj4pkhc@arbab-laptop.localdomain> <87poeya4dt.fsf@concordia.ellerman.id.au> <8e2417d8-d108-2949-40f2-997d53a3f367@linux.vnet.ibm.com> <87a861a25y.fsf@concordia.ellerman.id.au> <20170525151011.m4ae4ipxbqsj3mn7@arbab-laptop.localdomain> <87zie08ekt.fsf@concordia.ellerman.id.au> <20170526143147.z4lmtrs7vowucbkf@arbab-laptop.localdomain> <87lgpg6xe2.fsf@concordia.ellerman.id.au> <54877b2b-8446-20f6-e316-25af809ae11f@linux.vnet.ibm.com> <87tw402go0.fsf@concordia.ellerman.id.au> <54ebacf1-1249-cc6a-80a5-b293e581f401@linux.vnet.ibm.com> <8760g9qwfd.fsf@concordia.ellerman.id.au> <87tw3sdmpj.fsf@concordia.ellerman.id.au> User-Agent: Notmuch/0.21 (https://notmuchmail.org) Date: Tue, 13 Jun 2017 20:45:04 +1000 Message-ID: <87o9tsgo9b.fsf@concordia.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1347 Lines: 39 Michael Bringmann writes: > Here is the information from 2 different kernels. I have not been able to retrieve > the information matching yesterday's attachments, yet, as those dumps were > acquired in April. > > Attached please find 2 dumps of similar material from kernels running with my > current patches (Linux 4.4, Linux 4.12). OK thanks. I'd actually like to see the dmesg output from a kernel *without* your patches. Looking at the device tree properties: ltcalpine2-lp9:/proc/device-tree/ibm,dynamic-reconfiguration-memory # lsprop ibm,associativity-lookup-arrays ibm,associativity-lookup-arrays 00000004 = 4 arrays 00000004 = of 4 entries each 00000000 00000000 00000000 00000000 00000000 00000000 00000001 00000001 00000000 00000003 00000006 00000006 00000000 00000003 00000007 00000007 Which does tell us that nodes 0, 1, 6 and 7 exist. So your idea of looking at that and setting any node found in there online should work. My only worry is that behaviour appears to be completely undocumented in PAPR, ie. PAPR explicitly says that property only needs to contain values for LMBs present at boot. But possibly we can talk to the PowerVM/PAPR guys and have that changed so that it becomes something we can rely on. cheers