Re: oops in tcp_xmit_retransmit_queue() w/ v2.6.32.15

Lennart Schulte
2010-07-15T12:08:17Z

I'm testing new reordering algorithms in a virtual testbed, that is the
nodes are emulated with xen and all the network parameters can be tuned
with queues.
With one of the algorithms I also got tracebacks which include
tcp_xmit_retransmit_queue. It only happens with ACK loss. The kernel
version however is 2.6.31.
When I read this thread I tried the debug patch and got the following:

[ 2754.413150] NULL head, pkts 0
[ 2754.413156] Errors caught so far 1

Hope that is of any help.