From: "Michael S. Tsirkin" <mst@redhat.com>
To: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v5 resend 07/12] virtio: resolve for control queue
Date: Sun, 20 Sep 2015 12:21:14 +0300 [thread overview]
Message-ID: <20150920121748-mutt-send-email-mst@redhat.com> (raw)
In-Reply-To: <1442589061-19225-8-git-send-email-yuanhan.liu@linux.intel.com>
On Fri, Sep 18, 2015 at 11:10:56PM +0800, Yuanhan Liu wrote:
> From: Changchun Ouyang <changchun.ouyang@intel.com>
>
> Fix the max virtio queue pair read issue.
>
> Control queue can't work for vhost-user mulitple queue mode,
> so introduce a counter to void the dead loop when polling
> the control queue.
>
> Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Per virtio spec, the multiqueue feature depends on control queue -
what do you mean when you say it can't work?
> ---
> drivers/net/virtio/virtio_ethdev.c | 12 +++++++-----
> 1 file changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
> index 465d3cd..b2f4120 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c
> @@ -1162,7 +1162,6 @@ eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
> struct virtio_hw *hw = eth_dev->data->dev_private;
> struct virtio_net_config *config;
> struct virtio_net_config local_config;
> - uint32_t offset_conf = sizeof(config->mac);
> struct rte_pci_device *pci_dev;
>
> RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
> @@ -1222,7 +1221,9 @@ eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
> config = &local_config;
>
> if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
> - offset_conf += sizeof(config->status);
> + vtpci_read_dev_config(hw,
> + offsetof(struct virtio_net_config, status),
> + &config->status, sizeof(config->status));
> } else {
> PMD_INIT_LOG(DEBUG,
> "VIRTIO_NET_F_STATUS is not supported");
> @@ -1230,15 +1231,16 @@ eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
> }
>
> if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
> - offset_conf += sizeof(config->max_virtqueue_pairs);
> + vtpci_read_dev_config(hw,
> + offsetof(struct virtio_net_config, max_virtqueue_pairs),
> + &config->max_virtqueue_pairs,
> + sizeof(config->max_virtqueue_pairs));
> } else {
> PMD_INIT_LOG(DEBUG,
> "VIRTIO_NET_F_MQ is not supported");
> config->max_virtqueue_pairs = 1;
> }
>
> - vtpci_read_dev_config(hw, 0, (uint8_t *)config, offset_conf);
> -
> hw->max_rx_queues =
> (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
> VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
Does the patch actually do what the commit log says?
It seems tobe about reading the device confing,
not breaking out of a loop ...
> --
> 1.9.0
next prev parent reply other threads:[~2015-09-20 9:21 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-18 15:10 [dpdk-dev] [PATCH v5 resend 00/12] vhost-user multiple queues enabling Yuanhan Liu
2015-09-18 15:10 ` [dpdk-dev] [PATCH v5 resend 01/12] vhost-user: add protocol features support Yuanhan Liu
2015-09-18 15:10 ` [dpdk-dev] [PATCH v5 resend 02/12] vhost-user: add VHOST_USER_GET_QUEUE_NUM message Yuanhan Liu
2015-09-18 15:10 ` [dpdk-dev] [PATCH v5 resend 03/12] vhost: vring queue setup for multiple queue support Yuanhan Liu
2015-09-20 13:58 ` Marcel Apfelbaum
2015-09-21 2:06 ` Yuanhan Liu
2015-09-21 17:56 ` Marcel Apfelbaum
2015-09-22 7:31 ` Yuanhan Liu
2015-09-22 8:10 ` Marcel Apfelbaum
2015-09-22 8:34 ` Yuanhan Liu
2015-09-22 8:47 ` Marcel Apfelbaum
2015-09-22 9:21 ` Yuanhan Liu
2015-09-22 10:06 ` Marcel Apfelbaum
2015-09-22 14:22 ` Yuanhan Liu
2015-09-22 14:51 ` Marcel Apfelbaum
2015-09-23 3:46 ` Yuanhan Liu
2015-09-24 9:51 ` Marcel Apfelbaum
2015-09-21 9:07 ` Michael S. Tsirkin
2015-09-18 15:10 ` [dpdk-dev] [PATCH v5 resend 04/12] vhost: rxtx: prepare work " Yuanhan Liu
2015-09-20 9:29 ` Michael S. Tsirkin
2015-09-21 2:25 ` Yuanhan Liu
2015-09-21 9:04 ` Michael S. Tsirkin
2015-09-22 2:54 ` Yuanhan Liu
2015-09-18 15:10 ` [dpdk-dev] [PATCH v5 resend 05/12] vhost: add VHOST_USER_SET_VRING_ENABLE message Yuanhan Liu
2015-09-20 9:37 ` Michael S. Tsirkin
2015-09-21 2:22 ` Yuanhan Liu
2015-09-21 9:02 ` Michael S. Tsirkin
2015-09-22 2:21 ` Yuanhan Liu
2015-09-23 8:43 ` Yuanhan Liu
2015-09-18 15:10 ` [dpdk-dev] [PATCH v5 resend 06/12] vhost-user: handle VHOST_USER_RESET_OWNER correctly Yuanhan Liu
2015-09-18 15:10 ` [dpdk-dev] [PATCH v5 resend 07/12] virtio: resolve for control queue Yuanhan Liu
2015-09-20 9:21 ` Michael S. Tsirkin [this message]
2015-09-21 6:36 ` Yuanhan Liu
2015-10-08 15:32 ` Nikita Kalyazin
2015-10-08 20:51 ` Steffen Bauch
2015-10-09 7:11 ` Nikita Kalyazin
2015-10-12 8:39 ` Yuanhan Liu
2015-10-12 9:31 ` Xie, Huawei
2015-10-12 9:56 ` Xie, Huawei
2015-10-12 20:58 ` Steffen Bauch
2015-10-13 9:54 ` Yuanhan Liu
2015-09-18 15:10 ` [dpdk-dev] [PATCH v5 resend 08/12] vhost-user: enable vhost-user multiple queue Yuanhan Liu
2015-09-18 15:10 ` [dpdk-dev] [PATCH v5 resend 09/12] vhost: add API bind a virtq to a specific core Yuanhan Liu
2015-09-18 15:10 ` [dpdk-dev] [PATCH v5 resend 10/12] ixgbe: support VMDq RSS in non-SRIOV environment Yuanhan Liu
2015-09-18 15:11 ` [dpdk-dev] [PATCH v5 resend 11/12] examples/vhost: demonstrate the usage of vhost mq feature Yuanhan Liu
2015-09-18 15:11 ` [dpdk-dev] [PATCH v5 resend 12/12] examples/vhost: add per queue stats Yuanhan Liu
2015-09-20 11:48 ` [dpdk-dev] [PATCH v5 resend 00/12] vhost-user multiple queues enabling Marcel Apfelbaum
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