How to debug this condition of "eth2: tx hang 1 detected on queue 11, resetting adapter" ?

[lx2]

hi all:

I want to send sk_buff by "dev_queue_xmit", when I just send 2 packets, the network card may be hang.

I want to know how to debug this condition.

the /var/log/messages is:

#

[root@10g-host2 test]# tail -f /var/log/messagesSep 29 10:38:22 10g-host2 acpid: waiting for events: event logging is offSep 29 10:38:23 10g-host2 acpid: client connected from 2018[68:68]Sep 29 10:38:23 10g-host2 acpid: 1 client rule loadedSep 29 10:38:24 10g-host2 automount[2210]: lookup_read_master: lookup(nisplus): couldn't locate nis+ table auto.masterSep 29 10:38:24 10g-host2 mcelog: failed to prefill DIMM database from DMI dataSep 29 10:38:24 10g-host2 xinetd[2246]: xinetd Version 2.3.14 started with libwrap loadavg labeled-networking options compiled in.Sep 29 10:38:24 10g-host2 xinetd[2246]: Started working: 0 available servicesSep 29 10:38:25 10g-host2 abrtd: Init complete, entering main loopSep 29 10:39:41 10g-host2 kernel: vmalloc mmap_buf=ffffc90016e29000 mmap_size=4096Sep 29 10:39:41 10g-host2 kernel: insmod module wsmmap successfully!Sep 29 10:39:49 10g-host2 kernel: mmap_buf + 1024 is ffffc90016e29400Sep 29 10:39:49 10g-host2 kernel: data ffffc90016e2942a, len is 42Sep 29 10:39:49 10g-host2 kernel: udp data ffffc90016e29422Sep 29 10:39:49 10g-host2 kernel: ip data ffffc90016e2940eSep 29 10:39:49 10g-host2 kernel: eth data ffffc90016e29400Sep 29 10:39:49 10g-host2 kernel: h_source is ffffc90016e29406, dev_addr is ffff880c235c4750, len is 6result is 0Sep 29 10:39:50 10g-host2 kernel: mmap_buf + 1024 is ffffc90016e29400Sep 29 10:39:50 10g-host2 kernel: data ffffc90016e2942a, len is 42Sep 29 10:39:50 10g-host2 kernel: udp data ffffc90016e29422Sep 29 10:39:50 10g-host2 kernel: ip data ffffc90016e2940eSep 29 10:39:50 10g-host2 kernel: eth data ffffc90016e29400Sep 29 10:39:50 10g-host2 kernel: h_source is ffffc90016e29406, dev_addr is ffff880c235c4750, len is 6result is 0Sep 29 10:39:52 10g-host2 kernel: ixgbe 0000:03:00.0: eth2: Detected Tx Unit HangSep 29 10:39:52 10g-host2 kernel: Tx Queue <11>Sep 29 10:39:52 10g-host2 kernel: TDH, TDT <0>, <5>Sep 29 10:39:52 10g-host2 kernel: next_to_use <5><br style="color: # 000000; font-family: Tahoma; font-size...