Hi,
I am having some trouble tracing an error in
net/core/dev.c in function dev_queue_xmit.
This is code is called from Xen after live migration to another location
to send an unsolicited ARP broadcast to update the new location of the
migrating virtual machine.
It sets rc to -2 so that the ARP is not sent.
if (q->enqueue) {
/* Grab device queue */
spin_lock(&dev->queue_lock);
rc = q->enqueue(skb, q);
qdisc_run(dev);
spin_unlock(&dev->queue_lock);
rc = rc == NET_XMIT_BYPASS ? NET_XMIT_SUCCESS : rc;
goto out;
}
I am not able to trace where in the code q->enqueue is setting rc to -2
and what does the error mean. Is it because congestion is detected?
Thank you for your help.
Cristian
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