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[Qemu-discuss] vhost-user eventfd problem

From: 梁永正
Subject: [Qemu-discuss] vhost-user eventfd problem
Date: Sun, 15 Jul 2018 15:17:30 +0800 (GMT+08:00)

I use the "vhost-user" mode in the qemu,and the backend is the dpdk-vhost.But 
when I use the eventfd_read(vq->kickfd,&val) function,It always return an 
error,and the val has always been 0.The kickfd is the eventfd that passing from 
qemu to vhost when the vring is set up and calling the 
vhost_user_set_vring_kick function.It should be a none-zero value when there 
are packets in the seding queue.The virtio-frontend should notify the backend 
then doing the dequeue operation.Does anyone know about this?I am looking 
forward to your reply.

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