Description of problem:
Host is Fedora 10 x86_64 ; guest is Fedora 10 x86_64 in KVM.
After doing some network transfers, either by scp, with iperf, or with nc, the guest loses all network connectivity. Sometimes a "service network restart" will restore the network, most of the time not.


Version-Release number of selected component (if applicable):
kernel-2.6.27.5-117.fc10 ; also tried kernel-2.6.27.9-155.fc10 in both host and guest.


How reproducible:
always after some transfers (it always happens if I try to transfer a 1GB file, it will stall between 30MB and 200MB transferred).


Steps to Reproduce:
1. install a Fedora 10 x86_64 KVM guest in a Fedora 10 x86_64 KVM host
2. scp a 1GB+ file from the host to the guest
3. watch the transfer begin correctly then stall after some time
  
Actual results:
transfer stalls then guest has no network connectivity

Expected results:
transfer succeeds


Additional info:
Switching to another network driver fixes the problem :
"rmmod 8139too" and then either "modprobe 8139cp" or "modprobe e1000".
However, the main problem is that 8139too seems the default driver for KVM guests...
This awfully looks like :
http://www.mail-archive.com/kvm@vger.kernel.org/msg07445.html