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=-3.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 CA5B8C33C8C for ; Tue, 7 Jan 2020 13:10:04 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8FAF72081E for ; Tue, 7 Jan 2020 13:10:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CAG+hGH+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8FAF72081E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2024A8E002E; Tue, 7 Jan 2020 08:10:04 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 18C788E001E; Tue, 7 Jan 2020 08:10:04 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 07B088E002E; Tue, 7 Jan 2020 08:10:04 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0083.hostedemail.com [216.40.44.83]) by kanga.kvack.org (Postfix) with ESMTP id E2E488E001E for ; Tue, 7 Jan 2020 08:10:03 -0500 (EST) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id 91BA4181AEF00 for ; Tue, 7 Jan 2020 13:10:03 +0000 (UTC) X-FDA: 76350871086.21.stove50_57c1557582d40 X-HE-Tag: stove50_57c1557582d40 X-Filterd-Recvd-Size: 4561 Received: from mail-pf1-f196.google.com (mail-pf1-f196.google.com [209.85.210.196]) by imf17.hostedemail.com (Postfix) with ESMTP for ; Tue, 7 Jan 2020 13:10:02 +0000 (UTC) Received: by mail-pf1-f196.google.com with SMTP id z16so28601009pfk.0 for ; Tue, 07 Jan 2020 05:10:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=MynZ1SAOGTU0nRDuQMo0BN+WB3hB2dVTwjekB0beWeg=; b=CAG+hGH+HLYjugqNRJ5nwUnqrtR/ShgD/WaMHtGal6Hb50pSfE7rapvmRZaszmVLWo 3ZH4OQ/Ut7qHc+EjjkcYwV1Ot73EfLQp1U/gJ+5lVauptS9nG/3DT76/s39rwSk4dvP0 YeRN1fUGDcZtsFVeBoZubap4Msg0wz2/6hYAvXcLY60WpEJvHTomJcFN3U5uisRSt0qk EXunpRffn2Uy6S774+MZlCLwGCVzVpAd4j60L0E/QrKtDjzcH1Wy0v72WDaEYLDrPTRk XwhxUnsPeJbCN6lN+XNkKxhJLHE9qN1ne/ZNx00g7FHqhPBI9gLNrqzsLnLTyBO7jaLX UoKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=MynZ1SAOGTU0nRDuQMo0BN+WB3hB2dVTwjekB0beWeg=; b=uX5Vtgn3IeciycE37U0w2zc9ctsohgaa+ORmgfmRdrKn6xZxlosbDm/OhdYfjM8ZW6 TtDrK5+a6qNzmYDkSftVFBHqM6Y6bjpTOctPw8dQHIcZcB0+ga/ivfXAB5QMWLnSiToA NpzR+y9/FjwI/US9an1qK7FkpfW/3ihAaMjeQuIHfcZgynlDdwyaF98Tze5XfPjzmzlf OD3TAYC+CqISNAMf8AhMqFnEoagx+yogvFKYUBcxQ6DYOg5drG5rNNh+a9DXUsCT6QEO Tvh6kxHo1sqZYoDIURaoteQoMF/sU4QK2wsSMUHbYNB2QtlykKf2BmMuLkMFjKteqYwt SkdA== X-Gm-Message-State: APjAAAWrF5bXUK66JFSYsb2tesmMgglUE2K/iF8NRtFiLk7GOuDv9kS3 JZbs8ZCcR2njQ+jFt3r96aw= X-Google-Smtp-Source: APXvYqwQ4W0C7Jsq93dvxAKcJKEK9yPMyLQjdDmq1H/LycAYLDF051OolFCdns6C1W8REMVwtP8o+g== X-Received: by 2002:a62:ac08:: with SMTP id v8mr116710991pfe.83.1578402601964; Tue, 07 Jan 2020 05:10:01 -0800 (PST) Received: from localhost.corp.microsoft.com ([167.220.255.5]) by smtp.googlemail.com with ESMTPSA id m71sm27522400pje.0.2020.01.07.05.09.56 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 07 Jan 2020 05:10:01 -0800 (PST) From: lantianyu1986@gmail.com X-Google-Original-From: Tianyu.Lan@microsoft.com To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, sashal@kernel.org, akpm@linux-foundation.org, dan.j.williams@intel.com, jgg@ziepe.ca, dave.hansen@linux.intel.com, richardw.yang@linux.intel.com, namit@vmware.com, Tianyu.Lan@microsoft.com, david@redhat.com, christophe.leroy@c-s.fr, michael.h.kelley@microsoft.com Cc: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, vkuznets@redhat.com, eric.devolder@oracle.com Subject: [RFC PATCH V2 00/10] x86/Hyper-V: Add Dynamic memory hot-remove function Date: Tue, 7 Jan 2020 21:09:40 +0800 Message-Id: <20200107130950.2983-1-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.5 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Tianyu Lan Hyper-V provides dynamic memory hot add/remove function. Memory hot-add has already enabled in Hyper-V balloon driver. Now add memory hot-remove function. This patchset is based on the David Hildenbrand's "virtio-mem: paravirtualized memory" RFC V4 version and use new interface offline_and_remove_memory(). https://lkml.org/lkml/2019/12/12/681 Change since V1: - Split patch into small patch for review. - Convert ha_lock from spin lock to mutex. - Add a common work to handle all mem hot plug and balloon msg - Use offline_and_remove_memory() to offline and remove memory. Tianyu Lan (10): mm/resource: Move child to new resource when release mem region. mm: expose is_mem_section_removable() symbol x86/Hyper-V/Balloon: Replace hot-add and balloon up works with a common work x86/Hyper-V/Balloon: Convert spin lock ha_lock to mutex x86/Hyper-V/Balloon: Avoid releasing ha_lock when traverse ha_region_list x86/Hyper-V/Balloon: Enable mem hot-remove capability x86/Hyper-V/Balloon: Handle mem hot-remove request x86/Hyper-V/Balloon: Handle request with non-aligned page number x86/Hyper-V/Balloon: Hot add mem in the gaps of hot add region x86/Hyper-V: Workaround Hyper-V unballoon msg bug drivers/hv/hv_balloon.c | 754 ++++++++++++++++++++++++++++++++++++++++-------- kernel/resource.c | 38 ++- mm/memory_hotplug.c | 1 + 3 files changed, 673 insertions(+), 120 deletions(-) -- 2.14.5