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Asias He authored
If vhost is enabled for a virtio device, vhost will poll the ioeventfd in kernel side and there is no need to poll it in userspace. Otherwise, both vhost kernel and userspace will race to poll. Signed-off-by: Asias He <asias.hejun@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
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