Comment 5 for bug 1447664

Please note,this bug is unrelated to Bug #1331513 b/c even if TSO, GSO etc... are disabled, I can still re-producible it. The lock-up would only occur under VERY_HIGH_NETWORK_LOAD, so a typical user (web-surfing only) would not be able catch it easily. On a side note, the machine I am testing is an HP EliteDesk 705 (DMI info below), and it is the official certified hardware to run Ubuntu.

System Information
        Manufacturer: Hewlett-Packard
        Product Name: HP EliteDesk 705 G1 MT
        Version:
        Serial Number: 2UA5041TG4
        UUID: E24D7A80-9AA4-11E4-8822-8A8247065164
        Wake-up Type: Power Switch
        SKU Number: K5U61UP#ABA
        Family: 103C_53307F G=D

Here is the state of the network interface when the tigon3 driver completely locked up. Attached file is the dmesg log.

eth0 Link encap:Ethernet HWaddr 64:51:06:47:82:8a
          UP BROADCAST MULTICAST MTU:1500 Metric:1
          RX packets:90235313784 errors:30064771065 dropped:7 overruns:0 frame:120259084260
          TX packets:90387363107 errors:30064771065 dropped:0 overruns:0 carrier:0
          collisions:30064771065 txqueuelen:1000
          RX bytes:32978848243 (32.9 GB) TX bytes:321345086545 (321.3 GB)
          Interrupt:18

PS: I just compiled linux-stable 4.0 trunk, will try to run and and report back soon.