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=-4.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 3F685C433E0 for ; Thu, 30 Jul 2020 09:34:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1CE9F20809 for ; Thu, 30 Jul 2020 09:34:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="EzcZk52T" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729255AbgG3Jeg (ORCPT ); Thu, 30 Jul 2020 05:34:36 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:24038 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726774AbgG3Jef (ORCPT ); Thu, 30 Jul 2020 05:34:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1596101674; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=VsvIDJ16G7lHMB3EgzcHTDuFE1QcMQBKjWXayv4cmOY=; b=EzcZk52TqPl/1WSN5geKU63E9VgJUZn58JJx6PSKAdzOoEPPeZLgWKL2ISs2WEY7ma4vTW x3kClGbMOyn1ZVFLnNUwdAIpyZcZd7y/Ze3uRWefECOg9bdfHbo5LayIju92ZKayg0NuDr LsDzRz15C15oifTL1l4h2YW8SZo+odY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-491-2b-Qvm1UP1SdGnMOwUXZzQ-1; Thu, 30 Jul 2020 05:34:32 -0400 X-MC-Unique: 2b-Qvm1UP1SdGnMOwUXZzQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 14D49100CD1B; Thu, 30 Jul 2020 09:34:20 +0000 (UTC) Received: from t480s.redhat.com (ovpn-113-185.ams2.redhat.com [10.36.113.185]) by smtp.corp.redhat.com (Postfix) with ESMTP id 31FF269324; Thu, 30 Jul 2020 09:34:17 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: virtualization@lists.linux-foundation.org, linux-mm@kvack.org, David Hildenbrand , Andrew Morton , Baoquan He , Jason Wang , "Michael S. Tsirkin" , Michal Hocko , Mike Kravetz , Mike Rapoport , Pankaj Gupta , Qian Cai Subject: [PATCH v2 0/6] mm / virtio-mem: support ZONE_MOVABLE Date: Thu, 30 Jul 2020 11:34:10 +0200 Message-Id: <20200730093416.36210-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org @Andrew, @Mst, I suggest the whole series (including the virtio-mem change) goes via the -mm tree. Currently, virtio-mem does not really support ZONE_MOVABLE. While it allows to online fully plugged memory blocks to ZONE_MOVABLE, it does not allow to online partially-plugged memory blocks to ZONE_MOVABLE and will never consider such memory blocks when unplugging memory. This might be surprising for users (especially, if onlining suddenly fails). Let's support partially plugged memory blocks in ZONE_MOVABLE, allowing partially plugged memory blocks to be online to ZONE_MOVABLE and also unplugging from such memory blocks. This is especially helpful for testing, but also paves the way for virtio-mem optimizations, allowing more memory to get reliably unplugged. Cleanup has_unmovable_pages() and set_migratetype_isolate(), providing better documentation of how ZONE_MOVABLE interacts with different kind of unmovable pages (memory offlining vs. alloc_contig_range()). v1 -> v2: - "mm/page_isolation: don't dump_page(NULL) in set_migratetype_isolate()" -- Move to position 1, add Fixes: tag -- Drop unused "out:" label - "mm/page_isolation: drop WARN_ON_ONCE() in set_migratetype_isolate()" -- Keep curly braces on "else" case - Replace "[PATCH v1 5/6] mm/page_alloc: restrict ZONE_MOVABLE optimization in has_unmovable_pages() to memory offlining" by "mm: document semantics of ZONE_MOVABLE" -- Brain dump of what I know about ZONE_MOVABLE :) David Hildenbrand (6): mm/page_isolation: don't dump_page(NULL) in set_migratetype_isolate() mm/page_alloc: tweak comments in has_unmovable_pages() mm/page_isolation: drop WARN_ON_ONCE() in set_migratetype_isolate() mm/page_isolation: cleanup set_migratetype_isolate() virtio-mem: don't special-case ZONE_MOVABLE mm: document semantics of ZONE_MOVABLE drivers/virtio/virtio_mem.c | 47 +++++++------------------------------ include/linux/mmzone.h | 34 +++++++++++++++++++++++++++ mm/page_alloc.c | 22 +++++------------ mm/page_isolation.c | 39 ++++++++++++++---------------- 4 files changed, 65 insertions(+), 77 deletions(-) -- 2.26.2