From nobody Tue Feb 10 00:03:17 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1513005375103683.0412028146156; Mon, 11 Dec 2017 07:16:15 -0800 (PST) Received: from localhost ([::1]:53812 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eOPoR-0007f8-Gu for importer@patchew.org; Mon, 11 Dec 2017 10:16:11 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49704) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eOPmx-0006rI-AC for qemu-devel@nongnu.org; Mon, 11 Dec 2017 10:14:40 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eOPmw-0000KN-8g for qemu-devel@nongnu.org; Mon, 11 Dec 2017 10:14:39 -0500 Received: from userp2120.oracle.com ([156.151.31.85]:42496) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eOPmo-0000CG-PR; Mon, 11 Dec 2017 10:14:31 -0500 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.21/8.16.0.21) with SMTP id vBBFDppW045891; Mon, 11 Dec 2017 15:14:28 GMT Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp2120.oracle.com with ESMTP id 2esv8t03uv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 11 Dec 2017 15:14:28 +0000 Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id vBBFER5p013303 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 11 Dec 2017 15:14:27 GMT Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id vBBFERrh022379; Mon, 11 Dec 2017 15:14:27 GMT Received: from mhkanda-aus-1.us.oracle.com (/10.135.188.192) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 11 Dec 2017 07:14:27 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2017-10-26; bh=nas6PFlqcosbrCbqJOAcFvu9B52OwkaxLEbzYEZJM2o=; b=e871Cs8HbUGNzOnneY9nMFL9aQfHS4+6qcg3Cvbig7gycJvjfFZAkYktwBN9kjg1VC8N CRZNHZofuGM2kSekp88qDc/DuRRq8x+UaIHjBomGsb16/cq4j8fObnFtfZVZhAvW0X90 YkeMZPZEw5sQgWoPdm2PGR5qxoehkCQ/y3kKALTTf5dtGvU8uC38TPSwnHFSRYWd2CLt tbhMLIGWFAx3lZKiZv6YXFFmDrhEZHC2GFg41U6v3dNzVWEEN9uvLRKkLq5OojvLtbhK cokXQ7KF/+817z8bWy4RtpSzauR/UtMl0Y4jyMTVtDMQFS3hlbXrkhZ3NNO/kfb249Mw ig== From: Mark Kanda To: qemu-block@nongnu.org, qemu-devel@nongnu.org Date: Mon, 11 Dec 2017 09:16:24 -0600 Message-Id: <52e6d742811f10dbd16e996e86cf375b9577c187.1513005190.git.mark.kanda@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8742 signatures=668644 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1711220000 definitions=main-1712110227 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 156.151.31.85 Subject: [Qemu-devel] [PATCH v2 1/2] virtio-blk: make queue size configurable 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: martin.petersen@oracle.com, konrad.wilk@oracle.com, ameya.more@oracle.com, stefanha@redhat.com, karl.heubaum@oracle.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Depending on the configuration, it can be beneficial to adjust the virtio-b= lk queue size to something other than the current default of 128. Add a new property to make the queue size configurable. Signed-off-by: Mark Kanda Reviewed-by: Karl Heubaum Reviewed-by: Martin K. Petersen Reviewed-by: Ameya More --- hw/block/virtio-blk.c | 10 +++++++++- include/hw/virtio/virtio-blk.h | 1 + 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 05d1440..fb59f57 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -928,6 +928,13 @@ static void virtio_blk_device_realize(DeviceState *dev= , Error **errp) error_setg(errp, "num-queues property must be larger than 0"); return; } + if (!is_power_of_2(conf->queue_size) || + conf->queue_size > VIRTQUEUE_MAX_SIZE) { + error_setg(errp, "invalid queue-size property (%" PRIu16 "), " + "must be a power of 2 (max %d)", + conf->queue_size, VIRTQUEUE_MAX_SIZE); + return; + } =20 blkconf_serial(&conf->conf, &conf->serial); blkconf_apply_backend_options(&conf->conf, @@ -953,7 +960,7 @@ static void virtio_blk_device_realize(DeviceState *dev,= Error **errp) s->sector_mask =3D (s->conf.conf.logical_block_size / BDRV_SECTOR_SIZE= ) - 1; =20 for (i =3D 0; i < conf->num_queues; i++) { - virtio_add_queue(vdev, 128, virtio_blk_handle_output); + virtio_add_queue(vdev, conf->queue_size, virtio_blk_handle_output); } virtio_blk_data_plane_create(vdev, conf, &s->dataplane, &err); if (err !=3D NULL) { @@ -1012,6 +1019,7 @@ static Property virtio_blk_properties[] =3D { DEFINE_PROP_BIT("request-merging", VirtIOBlock, conf.request_merging, = 0, true), DEFINE_PROP_UINT16("num-queues", VirtIOBlock, conf.num_queues, 1), + DEFINE_PROP_UINT16("queue-size", VirtIOBlock, conf.queue_size, 128), DEFINE_PROP_LINK("iothread", VirtIOBlock, conf.iothread, TYPE_IOTHREAD, IOThread *), DEFINE_PROP_END_OF_LIST(), diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h index d3c8a6f..5117431 100644 --- a/include/hw/virtio/virtio-blk.h +++ b/include/hw/virtio/virtio-blk.h @@ -39,6 +39,7 @@ struct VirtIOBlkConf uint32_t config_wce; uint32_t request_merging; uint16_t num_queues; + uint16_t queue_size; }; =20 struct VirtIOBlockDataPlane; --=20 1.8.3.1