Hi Team,
From below link 
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html-single/Virtualization_Tuning_and_Optimization_Guide/index.html
In section 4.5: Multi-queue virtio-net works well for incoming traffic, but can 
occasionally hurt performance for outgoing traffic. Enabling multi-queue 
virtio-net increases the total throughput, and in parallel increases CPU 
consumption.
So for configuring multi-queue virtio-net for vhost-user I have applied the 
patch from https://lists.gnu.org/archive/html/qemu-devel/2015-05/msg05657.html .

After applying the patch and running the QEMU command I am able to see the 
segmentation fault in openvswitch.

Can you just let us know how to overcome this.

Thanks & Regards,
Ravali

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