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[Qemu-devel] [Question] why need to start all queues in vhost_net_start

From: Longpeng(Mike)
Subject: [Qemu-devel] [Question] why need to start all queues in vhost_net_start
Date: Wed, 15 Nov 2017 22:55:45 +0800

Hi guys,

We got a BUG report from our testers yesterday, the testing scenario was
migrating a VM (Windows guest, *4 vcpus*, 4GB, vhost-user net: *7 queues*).

We found the cause reason, and we'll report the BUG or send a fix patch
to upstream if necessary( we haven't test the upstream yet, sorry... ).

We want to know why the vhost_net_start() must start *total queues* ( in our
VM there're 7 queues ) but not *the queues that current used* ( in our VM, guest
only uses the first 4 queues because it's limited by the number of vcpus) ?

Looking forward to your help, thx :)


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