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[Qemu-devel] 答复: Re: 答复: Re: [PATCH] vhost: don't set vring call fd to
From: |
lu.zhipeng |
Subject: |
[Qemu-devel] 答复: Re: 答复: Re: [PATCH] vhost: don't set vring call fd to -1 invhost_virtqueue_start for vhost-user |
Date: |
Tue, 22 Aug 2017 08:45:14 +0800 (CST) |
>On 2017年08月21日 11:28, address@hidden wrote:
>> if (!vdev->use_guest_notifier_mask) {>>> > /* TODO: check and
>> handle errors. */>>> < vhost_virtqueue_mask(dev, vdev, idx, false)>>
>> ---------- set right callfd>> }>>>>> if
>> (k->query_guest_notifiers &&>>
>> k->query_guest_notifiers(qbus->parent) &&>>
>> virtio_queue_vector(vdev, idx) == VIRTIO_NO_VECTOR) {>> file.fd =
>> -1>> r = dev->vhost_ops->vhost_set_vring_call(dev, &file)>>
>> -----------set call fd to -1>> if (r) {>> goto
>> fail_vector>> }>> }>>> So the callfd of ovs+dpdk in host
>> is -1. it can't be able to interact with the guest.>>>>>The queue does
>> not even an vector, so it won't generate any interrupt. >Why callfd is still
>> needed?
----it's a bug of my vhost-user backend. Thanks.
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IT开发工程师 IT Development
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原始邮件
发件人: <address@hidden>
收件人:芦志朋10108272
抄送人: <address@hidden> <address@hidden>
日 期 :2017年08月21日 11:35
主 题 :Re: [Qemu-devel] 答复: Re: [PATCH] vhost: don't set vring call fd to -1
invhost_virtqueue_start for vhost-user
On 2017年08月21日 11:28, address@hidden wrote:
> if (!vdev->use_guest_notifier_mask) {
>
> /* TODO: check and handle errors. */
>
> vhost_virtqueue_mask(dev, vdev, idx, false)
>
> ---------- set right callfd
>
> }
>
>
>
>
> if (k->query_guest_notifiers &&
>
> k->query_guest_notifiers(qbus->parent) &&
>
> virtio_queue_vector(vdev, idx) == VIRTIO_NO_VECTOR) {
>
> file.fd = -1
>
> r = dev->vhost_ops->vhost_set_vring_call(dev, &file)
>
> -----------set call fd to -1
>
> if (r) {
>
> goto fail_vector
>
> }
>
> }
>
> So the callfd of ovs+dpdk in host is -1. it can't be able to
> interact with the guest.
>
>
The queue does not even an vector, so it won't generate any interrupt.
Why callfd is still needed?
Thanks
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