Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2CAB8C433EF for ; Tue, 16 Nov 2021 12:30:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0EA8061AD2 for ; Tue, 16 Nov 2021 12:30:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236282AbhKPMdv (ORCPT ); Tue, 16 Nov 2021 07:33:51 -0500 Received: from gentwo.de ([161.97.139.209]:48674 "EHLO gentwo.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236283AbhKPMds (ORCPT ); Tue, 16 Nov 2021 07:33:48 -0500 Received: by gentwo.de (Postfix, from userid 1001) id 0992BB00434; Tue, 16 Nov 2021 13:30:45 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by gentwo.de (Postfix) with ESMTP id 08372B00192; Tue, 16 Nov 2021 13:30:45 +0100 (CET) Date: Tue, 16 Nov 2021 13:30:45 +0100 (CET) From: Christoph Lameter To: Dennis Zhou cc: Alexey Makhalov , Michal Hocko , Andrew Morton , "linux-kernel@vger.kernel.org" , "mm-commits@vger.kernel.org" , "osalvador@suse.de" , "stable@vger.kernel.org" , "tj@kernel.org" Subject: Re: + mm-fix-panic-in-__alloc_pages.patch added to -mm tree In-Reply-To: Message-ID: References: <20211108205031.UxDPHBZWa%akpm@linux-foundation.org> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 15 Nov 2021, Dennis Zhou wrote: > I need some clarification here. It sounds like memoryless nodes work on > x86, but hotplug + memoryless nodes isn't a supported use case or you're > introducing it as a new use case? Could you do that step by step? First add the new node and ensure everything is ok and that the memory is online. *After* that is done bring up the new processor and associate the processor with *online* memory.