From patchwork Fri Aug 6 12:47:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 12423435 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=-16.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 B34B3C432BE for ; Fri, 6 Aug 2021 12:50:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 934BC611C5 for ; Fri, 6 Aug 2021 12:50:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343863AbhHFMuU (ORCPT ); Fri, 6 Aug 2021 08:50:20 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:24266 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343801AbhHFMs5 (ORCPT ); Fri, 6 Aug 2021 08:48:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628254120; 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: in-reply-to:in-reply-to:references:references; bh=s/KddycY40Z4LqW96eG3IVtIPqM03IoorWzmAhpSWjI=; b=VEl4N/4B2dEuqQdtEAzSJnHtduJLTcIuHseIMKcMhETPjR8CxiMrlr6wezQXdLCzQssJlc bWV2ngJUljNlz1A388UpGdjq8FhcM0VMMHJv1+PmfzlY/d4ZN1tPOY/8r+xfp8dUkZASZ5 d//XDH133F/Qb/qJJItxaiVV7wSEFZ4= 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-233-1aaSeAFvPw2EJ5ER6kcCmg-1; Fri, 06 Aug 2021 08:48:39 -0400 X-MC-Unique: 1aaSeAFvPw2EJ5ER6kcCmg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DA7828042EB; Fri, 6 Aug 2021 12:48:36 +0000 (UTC) Received: from t480s.redhat.com (unknown [10.39.192.224]) by smtp.corp.redhat.com (Postfix) with ESMTP id A4F0A5D6A1; Fri, 6 Aug 2021 12:48:24 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: David Hildenbrand , Andrew Morton , Vitaly Kuznetsov , "Michael S. Tsirkin" , Jason Wang , Marek Kedzierski , Hui Zhu , Pankaj Gupta , Wei Yang , Oscar Salvador , Michal Hocko , Dan Williams , Anshuman Khandual , Dave Hansen , Vlastimil Babka , Mike Rapoport , "Rafael J. Wysocki" , Len Brown , Pavel Tatashin , Greg Kroah-Hartman , virtualization@lists.linux-foundation.org, linux-mm@kvack.org, linux-acpi@vger.kernel.org Subject: [PATCH v3 7/9] virtio-mem: use a single dynamic memory group for a single virtio-mem device Date: Fri, 6 Aug 2021 14:47:13 +0200 Message-Id: <20210806124715.17090-8-david@redhat.com> In-Reply-To: <20210806124715.17090-1-david@redhat.com> References: <20210806124715.17090-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Let's use a single dynamic memory group. Signed-off-by: David Hildenbrand --- drivers/virtio/virtio_mem.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c index 774986695dc4..8945f248ce69 100644 --- a/drivers/virtio/virtio_mem.c +++ b/drivers/virtio/virtio_mem.c @@ -143,6 +143,8 @@ struct virtio_mem { * add_memory_driver_managed(). */ const char *resource_name; + /* Memory group identification. */ + int mgid; /* * We don't want to add too much memory if it's not getting onlined, @@ -626,8 +628,8 @@ static int virtio_mem_add_memory(struct virtio_mem *vm, uint64_t addr, addr + size - 1); /* Memory might get onlined immediately. */ atomic64_add(size, &vm->offline_size); - rc = add_memory_driver_managed(vm->nid, addr, size, vm->resource_name, - MHP_MERGE_RESOURCE); + rc = add_memory_driver_managed(vm->mgid, addr, size, vm->resource_name, + MHP_MERGE_RESOURCE | MHP_NID_IS_MGID); if (rc) { atomic64_sub(size, &vm->offline_size); dev_warn(&vm->vdev->dev, "adding memory failed: %d\n", rc); @@ -2562,6 +2564,7 @@ static bool virtio_mem_has_memory_added(struct virtio_mem *vm) static int virtio_mem_probe(struct virtio_device *vdev) { struct virtio_mem *vm; + uint64_t unit_pages; int rc; BUILD_BUG_ON(sizeof(struct virtio_mem_req) != 24); @@ -2596,6 +2599,16 @@ static int virtio_mem_probe(struct virtio_device *vdev) if (rc) goto out_del_vq; + /* use a single dynamic memory group to cover the whole memory device */ + if (vm->in_sbm) + unit_pages = PHYS_PFN(memory_block_size_bytes()); + else + unit_pages = PHYS_PFN(vm->bbm.bb_size); + rc = memory_group_register_dynamic(vm->nid, unit_pages); + if (rc < 0) + goto out_del_resource; + vm->mgid = rc; + /* * If we still have memory plugged, we have to unplug all memory first. * Registering our parent resource makes sure that this memory isn't @@ -2610,7 +2623,7 @@ static int virtio_mem_probe(struct virtio_device *vdev) vm->memory_notifier.notifier_call = virtio_mem_memory_notifier_cb; rc = register_memory_notifier(&vm->memory_notifier); if (rc) - goto out_del_resource; + goto out_unreg_group; rc = register_virtio_mem_device(vm); if (rc) goto out_unreg_mem; @@ -2624,6 +2637,8 @@ static int virtio_mem_probe(struct virtio_device *vdev) return 0; out_unreg_mem: unregister_memory_notifier(&vm->memory_notifier); +out_unreg_group: + memory_group_unregister(vm->mgid); out_del_resource: virtio_mem_delete_resource(vm); out_del_vq: @@ -2688,6 +2703,7 @@ static void virtio_mem_remove(struct virtio_device *vdev) } else { virtio_mem_delete_resource(vm); kfree_const(vm->resource_name); + memory_group_unregister(vm->mgid); } /* remove all tracking data - no locking needed */