[PATCH 6/6] kvm: qemu: virtio-net: drop mutex during tx tapfd write

[Mark McLoughlin <markmc@redhat.com>]

This allows the guest vcpu thread to exit while the I/O thread is
churning away.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
---
 qemu/hw/virtio-net.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/qemu/hw/virtio-net.c b/qemu/hw/virtio-net.c
index 0612f5f..aa1c107 100644
--- a/qemu/hw/virtio-net.c
+++ b/qemu/hw/virtio-net.c
@@ -252,7 +252,9 @@ static int virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq)
 	    len += sizeof(struct virtio_net_hdr);
 	}
 
+	kvm_sleep_begin();
 	len += qemu_sendv_packet(n->vc, out_sg, out_num);
+	kvm_sleep_end();
 
 	virtqueue_push(vq, &elem, len);
 	virtio_notify(&n->vdev, vq);
-- 
1.5.4.3