Hello Michael,
On Tue, 2009-10-27 at 08:43 +0200, Michael S. Tsirkin wrote:
> At some point my guest had a runaway nash-hotplug process
> consuming 100% CPU. Could you please verify this
> does not happen to you?
What I have found that the start_xmit stopped and restarted too often.
There is no vring descriptor available for adding the new buf. The buf
release is not able to keep up after vhost patch?
I saw lots of "Unexpected full queue" from dmesg. I haven't had time to
debug it yet. You might have some idea here?
/* This can happen with OOM and indirect buffers. */
if (unlikely(capacity < 0)) {
netif_stop_queue(dev);
dev_warn(&dev->dev, "Unexpected full queue\n");
if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
vi->svq->vq_ops->disable_cb(vi->svq);
netif_start_queue(dev);
goto again;
}
return NETDEV_TX_BUSY;
}
Thanks
Shirley
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