From patchwork Mon Jan 22 06:57:49 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhoujian (jay)" X-Patchwork-Id: 864176 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3zQ2Rh1pb5z9s74 for ; Mon, 22 Jan 2018 18:02:08 +1100 (AEDT) Received: from localhost ([::1]:51090 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1edW7K-0008Fi-Cg for incoming@patchwork.ozlabs.org; Mon, 22 Jan 2018 02:02:06 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60741) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1edW4j-0006pE-Uu for qemu-devel@nongnu.org; Mon, 22 Jan 2018 01:59:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1edW4f-0001rs-Ac for qemu-devel@nongnu.org; Mon, 22 Jan 2018 01:59:26 -0500 Received: from szxga03-in.huawei.com ([45.249.212.189]:2249 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1edW4e-0001lw-VZ for qemu-devel@nongnu.org; Mon, 22 Jan 2018 01:59:21 -0500 Received: from DGGEMS414-HUB.china.huawei.com (unknown [10.3.19.214]) by Forcepoint Email with ESMTP id B0794CF8DD8A3; Mon, 22 Jan 2018 14:59:15 +0800 (CST) Received: from localhost (10.177.19.14) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.361.1; Mon, 22 Jan 2018 14:59:09 +0800 From: Jay Zhou To: Date: Mon, 22 Jan 2018 14:57:49 +0800 Message-ID: X-Mailer: git-send-email 2.6.1.windows.1 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [10.177.19.14] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 45.249.212.189 Subject: [Qemu-devel] [PATCH v7 1/2] vhost: fix memslot limit check X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: weidong.huang@huawei.com, mst@redhat.com, wangxinxin.wang@huawei.com, arei.gonglei@huawei.com, jianjay.zhou@huawei.com, imammedo@redhat.com, liuzhe13@huawei.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Since used_memslots will be updated to the actual value after registering memory listener for the first time, move the memslots limit checking to the right place. Reviewed-by: Igor Mammedov Signed-off-by: Jay Zhou --- hw/virtio/vhost.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 386aef8..1ac512e 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1251,13 +1251,6 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque, goto fail; } - if (used_memslots > hdev->vhost_ops->vhost_backend_memslots_limit(hdev)) { - error_report("vhost backend memory slots limit is less" - " than current number of present memory slots"); - r = -1; - goto fail; - } - r = hdev->vhost_ops->vhost_set_owner(hdev); if (r < 0) { VHOST_OPS_DEBUG("vhost_set_owner failed"); @@ -1339,6 +1332,18 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque, hdev->memory_changed = false; memory_listener_register(&hdev->memory_listener, &address_space_memory); QLIST_INSERT_HEAD(&vhost_devices, hdev, entry); + + if (used_memslots > hdev->vhost_ops->vhost_backend_memslots_limit(hdev)) { + error_report("vhost backend memory slots limit is less" + " than current number of present memory slots"); + r = -1; + if (busyloop_timeout) { + goto fail_busyloop; + } else { + goto fail; + } + } + return 0; fail_busyloop: