patches for DPDK stable branches
 help / color / mirror / Atom feed
From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: Adrian Moreno <amorenoz@redhat.com>,
	"Xia, Chenbo" <chenbo.xia@intel.com>,
	"Wang, Yinan" <yinan.wang@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>
Cc: "Fu, Patrick" <patrick.fu@intel.com>,
	"stable@dpdk.org" <stable@dpdk.org>,
	"Wang, Zhihong" <zhihong.wang@intel.com>,
	"Xu, Qian Q" <qian.q.xu@intel.com>
Subject: Re: [dpdk-stable] [PATCH v2 3/3] virtio-user: set status on virtio-user reconnect
Date: Thu, 22 Oct 2020 10:32:04 +0200
Message-ID: <06e26a13-fbe1-c96a-2aff-f84d413aedcf@redhat.com> (raw)
In-Reply-To: <70fe89be-ca87-6af7-9f4f-b7c377d4b41c@redhat.com>



On 10/22/20 10:12 AM, Adrian Moreno wrote:
> 
> 
> On 10/22/20 9:37 AM, Xia, Chenbo wrote:
>> Hi Maxime,
>>
>>> -----Original Message-----
>>> From: Maxime Coquelin <maxime.coquelin@redhat.com>
>>> Sent: Thursday, October 22, 2020 3:14 PM
>>> To: Wang, Yinan <yinan.wang@intel.com>; Adrian Moreno
>>> <amorenoz@redhat.com>; dev@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>
>>> Cc: Fu, Patrick <patrick.fu@intel.com>; stable@dpdk.org; Wang, Zhihong
>>> <zhihong.wang@intel.com>; Xu, Qian Q <qian.q.xu@intel.com>
>>> Subject: Re: [PATCH v2 3/3] virtio-user: set status on virtio-user
>>> reconnect
>>>
>>> Hi Yinan,
>>>
>>> On 10/22/20 6:01 AM, Wang, Yinan wrote:
>>>> Hi Maxime/ Adrian,
>>>>
>>>> Thanks for the patch.  we can launch vhost-user with client mode with
>>> this fix patch.
>>>> But still fail to get throughput with basic vhost/virtio-user server
>>> mode loopback test. This is another problem which introduced by
>>> 57912824615fd7787a48a7b18e40661466.
>>>> Bugzilla: https://bugs.dpdk.org/show_bug.cgi?id=541
>>>
>>> Thanks for reporting the issue, I will look at it this morning.
>>>
>>> BTW, this virtio-user server mode is broken by design, we should really
>>> fix it.
>>>
>>> For example, it assumes features to be supported by the backend before
>>> the negotiation took place:
>>> https://git.dpdk.org/dpdk/tree/drivers/net/virtio/virtio_user/virtio_user_
>>> dev.c#n513
>>>
>>> As part of my rework, I suggest we implement the same behaviour as QEMU
>>> does, which will be reliable and consistent with QEMU. It means that if
>>> server mode is enabled in device command-line, the driver waits until
>>> the socket is ready.
>>>
>>> Chenbo, Adrian, what do you think?
>>
>> Yes! I totally agree and have the same opinion for a long time. As I remember, this
>> feature assumption has caused problems before and I notice the new STATUS feature is
>> also affected. It's good to make this consistent with QEMU 😊.
>>
> +1
> 
> In fact, I was looking into how to get rid of some error messages originated
> during the initialization of the virtio-pci layer when the socket is still not
> ready.

Is that the error messages you meant?


virtio_user_send_status_update(): VHOST_USER_SET_STATUS failed (-1): Success
virtio_user_update_status(): VHOST_USER_GET_STATUS failed (-1): Success
virtio_user_update_status(): VHOST_USER_GET_STATUS failed (-1): Success
virtio_user_send_status_update(): VHOST_USER_SET_STATUS failed (-1): Success
virtio_user_update_status(): VHOST_USER_GET_STATUS failed (-1): Success
virtio_user_send_status_update(): VHOST_USER_SET_STATUS failed (-1): Success
virtio_user_update_status(): VHOST_USER_GET_STATUS failed (-1): Success
virtio_user_send_status_update(): VHOST_USER_SET_STATUS failed (-1): Success
virtio_user_update_status(): VHOST_USER_GET_STATUS failed (-1): Success
virtio_user_update_status(): VHOST_USER_GET_STATUS failed (-1): Success
virtio_user_send_status_update(): VHOST_USER_SET_STATUS failed (-1): Success


That would be good to have them fixed

> 
>> Cheers,
>> Chenbo
>>
>>>
>>> Thanks,
>>> Maxime
>>>
>>>> BR,
>>>> Yinan
>>>>> -----Original Message-----
>>>>> From: Maxime Coquelin <maxime.coquelin@redhat.com>
>>>>> Sent: 2020年10月21日 0:43
>>>>> To: Adrian Moreno <amorenoz@redhat.com>; dev@dpdk.org
>>>>> Cc: Wang, Yinan <yinan.wang@intel.com>; Fu, Patrick
>>> <patrick.fu@intel.com>;
>>>>> stable@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>; Wang, Zhihong
>>>>> <zhihong.wang@intel.com>
>>>>> Subject: Re: [PATCH v2 3/3] virtio-user: set status on virtio-user
>>> reconnect
>>>>>
>>>>>
>>>>>
>>>>> On 10/20/20 5:20 PM, Adrian Moreno wrote:
>>>>>> Newer vhost-user backends will rely on SET_STATUS to start the device
>>>>>> so this required to support them.
>>>>>>
>>>>>> Fixes: 57912824615f ("net/virtio-user: support vhost status setting")
>>>>>> Cc: maxime.coquelin@redhat.com
>>>>>> Cc: stable@dpdk.org
>>>>>>
>>>>>> Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
>>>>>> ---
>>>>>>  drivers/net/virtio/virtio_user_ethdev.c | 14 ++++++++++++--
>>>>>>  1 file changed, 12 insertions(+), 2 deletions(-)
>>>>>>
>>>>>> diff --git a/drivers/net/virtio/virtio_user_ethdev.c
>>>>> b/drivers/net/virtio/virtio_user_ethdev.c
>>>>>> index e870fb2ff..d8bea4537 100644
>>>>>> --- a/drivers/net/virtio/virtio_user_ethdev.c
>>>>>> +++ b/drivers/net/virtio/virtio_user_ethdev.c
>>>>>> @@ -78,6 +78,13 @@ virtio_user_server_reconnect(struct virtio_user_dev
>>>>> *dev)
>>>>>>  		return -1;
>>>>>>
>>>>>>  	dev->vhostfd = connectfd;
>>>>>> +
>>>>>> +	vtpci_reset(hw);
>>>>>> +
>>>>>> +	vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
>>>>>> +
>>>>>> +	vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
>>>>>> +
>>>>>>  	if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES,
>>>>>>  				   &dev->device_features) < 0) {
>>>>>>  		PMD_INIT_LOG(ERR, "get_features failed: %s",
>>>>>> @@ -111,6 +118,8 @@ virtio_user_server_reconnect(struct
>>> virtio_user_dev
>>>>> *dev)
>>>>>>
>>>>>>  	dev->features &= dev->device_features;
>>>>>>
>>>>>> +	vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
>>>>>> +
>>>>>>  	/* For packed ring, resetting queues is required in reconnection. */
>>>>>>  	if (vtpci_packed_queue(hw) &&
>>>>>>  	   (vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_DRIVER_OK)) {
>>>>>> @@ -119,8 +128,9 @@ virtio_user_server_reconnect(struct
>>> virtio_user_dev
>>>>> *dev)
>>>>>>  		virtio_user_reset_queues_packed(eth_dev);
>>>>>>  	}
>>>>>>
>>>>>> -	ret = virtio_user_start_device(dev);
>>>>>> -	if (ret < 0)
>>>>>> +	/*  Start the device */
>>>>>> +	vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER_OK);
>>>>>> +	if (!dev->started)
>>>>>>  		return -1;
>>>>>>
>>>>>>  	if (dev->queue_pairs > 1) {
>>>>>>
>>>>>
>>>>> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>>>>>
>>>>> Thanks,
>>>>> Maxime
>>>>
>>
> 


  reply	other threads:[~2020-10-22  8:32 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20201020152052.389446-1-amorenoz@redhat.com>
2020-10-20 15:20 ` [dpdk-stable] [PATCH v2 1/3] virtio-user: fix backend selection if stat fails Adrian Moreno
2020-10-20 15:26   ` Maxime Coquelin
2020-10-20 16:52   ` [dpdk-stable] [dpdk-dev] " Kevin Traynor
2020-10-20 15:20 ` [dpdk-stable] [PATCH v2 2/3] virtio_user: don't set/get_status until FEATURES_OK Adrian Moreno
2020-10-20 16:17   ` Maxime Coquelin
2020-10-20 15:20 ` [dpdk-stable] [PATCH v2 3/3] virtio-user: set status on virtio-user reconnect Adrian Moreno
2020-10-20 16:42   ` Maxime Coquelin
2020-10-22  4:01     ` Wang, Yinan
2020-10-22  7:13       ` Maxime Coquelin
2020-10-22  7:37         ` Xia, Chenbo
2020-10-22  8:12           ` Adrian Moreno
2020-10-22  8:32             ` Maxime Coquelin [this message]
2020-10-23  5:21               ` [dpdk-stable] [dpdk-dev] " Jiang, YuX

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=06e26a13-fbe1-c96a-2aff-f84d413aedcf@redhat.com \
    --to=maxime.coquelin@redhat.com \
    --cc=amorenoz@redhat.com \
    --cc=chenbo.xia@intel.com \
    --cc=dev@dpdk.org \
    --cc=patrick.fu@intel.com \
    --cc=qian.q.xu@intel.com \
    --cc=stable@dpdk.org \
    --cc=yinan.wang@intel.com \
    --cc=zhihong.wang@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

patches for DPDK stable branches

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/stable/0 stable/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 stable stable/ https://inbox.dpdk.org/stable \
		stable@dpdk.org
	public-inbox-index stable

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.stable


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git