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Subject: Re: [Qemu-devel] [PATCH V3] vhost_net: start/stop guest notifiers
 properly
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To: "Zhangjie (HZ)" <zhangjie14@huawei.com>, qemu-devel@nongnu.org, mst@redhat.com
Cc: William Dauchy <wdauchy@gmail.com>

On 08/20/2014 05:23 PM, Zhangjie (HZ) wrote:
> On 2014/8/19 12:56, Jason Wang wrote:
>> commit a9f98bb5ebe6fb1869321dcc58e72041ae626ad8 vhost: multiqueue
>  call it before setting
>> Zhang Jie, please test this patch to see if it fixes the issue.
>> +static void vhost_net_set_vq_index(struct vhost_net *net, int vq_index)
>> +{
>> +    net->dev.vq_index = vq_index;
>> +}
>                           int vq_index)
>> ...
> Because of vhost_net_set_vq_index, VM can be start successfully.
> But, after about 80 times of migration under my environment, virtual nic became unreachable again.
> When I use jprobe to notify tap, the virtual nic becomes reachable again. This shows that interrupts missing causes
> the problem.

Thanks for the testing. A questions is can you reproduce this when vhost
is disabled?

Anyway, I will try to reproduce it by myself.