From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EAF9BC46470 for ; Tue, 7 Aug 2018 14:41:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AC6EF217B9 for ; Tue, 7 Aug 2018 14:41:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AC6EF217B9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389672AbeHGQ4P (ORCPT ); Tue, 7 Aug 2018 12:56:15 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:49608 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2389406AbeHGQ4P (ORCPT ); Tue, 7 Aug 2018 12:56:15 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id EDB7D7DAC2; Tue, 7 Aug 2018 14:41:35 +0000 (UTC) Received: from [10.36.116.32] (ovpn-116-32.ams2.redhat.com [10.36.116.32]) by smtp.corp.redhat.com (Postfix) with ESMTP id D71722026D66; Tue, 7 Aug 2018 14:41:33 +0000 (UTC) Subject: Re: [RFC PATCH 0/3] Do not touch pages in remove_memory path To: Oscar Salvador Cc: akpm@linux-foundation.org, mhocko@suse.com, dan.j.williams@intel.com, pasha.tatashin@oracle.com, jglisse@redhat.com, yasu.isimatu@gmail.com, logang@deltatee.com, dave.jiang@intel.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Oscar Salvador References: <20180807133757.18352-1-osalvador@techadventures.net> <6407d022-87b7-f5e0-572a-c5c29aba1314@redhat.com> <20180807141922.GA5244@techadventures.net> <20180807142826.GB5309@techadventures.net> From: David Hildenbrand Openpgp: preference=signencrypt Autocrypt: addr=david@redhat.com; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20180807142826.GB5309@techadventures.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Tue, 07 Aug 2018 14:41:36 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Tue, 07 Aug 2018 14:41:36 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'david@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07.08.2018 16:28, Oscar Salvador wrote: > On Tue, Aug 07, 2018 at 04:20:37PM +0200, David Hildenbrand wrote: >> On 07.08.2018 16:19, Oscar Salvador wrote: >>> On Tue, Aug 07, 2018 at 04:16:35PM +0200, David Hildenbrand wrote: >>>> On 07.08.2018 15:37, osalvador@techadventures.net wrote: >>>>> From: Oscar Salvador >>>>> >>>>> This tries to fix [1], which was reported by David Hildenbrand, and also >>>>> does some cleanups/refactoring. >>>>> >>>>> I am sending this as RFC to see if the direction I am going is right before >>>>> spending more time into it. >>>>> And also to gather feedback about hmm/zone_device stuff. >>>>> The code compiles and I tested it successfully with normal memory-hotplug operations. >>>>> >>>> >>>> Please coordinate next time with people already working on this, >>>> otherwise you might end up wasting other people's time. >>> >>> Hi David, >>> >>> Sorry, if you are already working on this, I step back immediately. >>> I will wait for your work. >> >> No, please keep going, you are way ahead of me ;) >> >> (I was got stuck at ZONE_DEVICE so far) > > It seems mine breaks ZONE_DEVICE for hmm at least, so.. not much better ^^. > So since you already got some work, let us not throw it away. I am not close to an RFC (spent most time looking into the details - still have plenty to learn in the MM area - and wondering on how to handle ZONE_DEVICE). It might take some time for me to get something clean up and running. So let's continue with your series, I'll happily review it. (I was just surprised by this series without a prior note as reply to the patch where we discussed the solution for the problem) > > Thanks > -- Thanks, David / dhildenb