[E1000-devel] Detected Tx Unit Hang

[Gary W. S. <ga...@pr...>]

I asked this last week but didn't get a response.  I have a supermicro
server with a dual intel nic that uses the e0100 driver.  I'm using
CentOS 5.2 and when I do anything network intensive I lose connectivity
for a few seconds.  Then we get this in the log.  I downloaded, compiled
and installed the latest e1000 driver.  I see that the driver is in the
proper location (based on timestamp).

How can I fix this problem on this server.   I have tried to manually
disable the tso and other entries but this doesn't seem to help.  I've
also tried setting it down to 100/full to no avail.  It appears to be a
TX, not RX issue.  I say this because I run dstat in the background and
when it hangs and then comes back it will quickly dump a full screen of
dstat entries, which should be one per second, which I'm assuming that
TCP is buffering the packets.

Things I've tried.

/sbin/ethtool -K eth0 tso off
/sbin/ethtool -K eth0 rx off
/sbin/ethtool -K eth0 tx off
/sbin/ethtool -K eth0 sg off


Mar 11 18:50:01 vcsoaknas01 kernel: e1000: eth0: e1000_clean_tx_irq:
Detected Tx Unit Hang
Mar 11 18:50:01 vcsoaknas01 kernel:   Tx Queue             <0>
Mar 11 18:50:01 vcsoaknas01 kernel:   TDH                  <f7>
Mar 11 18:50:01 vcsoaknas01 kernel:   TDT                  <f7>
Mar 11 18:50:01 vcsoaknas01 kernel:   next_to_use          <f7>
Mar 11 18:50:01 vcsoaknas01 kernel:   next_to_clean        <24>
Mar 11 18:50:01 vcsoaknas01 kernel: buffer_info[next_to_clean]
Mar 11 18:50:01 vcsoaknas01 kernel:   time_stamp           <1004de0b1>
Mar 11 18:50:01 vcsoaknas01 kernel:   next_to_watch        <24>
Mar 11 18:50:01 vcsoaknas01 kernel:   jiffies              <1004dec18>
Mar 11 18:50:01 vcsoaknas01 kernel:   next_to_watch.status <0>
Mar 11 18:50:03 vcsoaknas01 kernel: e1000: eth0: e1000_clean_tx_irq:
Detected Tx Unit Hang
Mar 11 18:50:03 vcsoaknas01 kernel:   Tx Queue             <0>
Mar 11 18:50:03 vcsoaknas01 kernel:   TDH                  <f7>
Mar 11 18:50:03 vcsoaknas01 kernel:   TDT                  <f7>
Mar 11 18:50:03 vcsoaknas01 kernel:   next_to_use          <f7>
Mar 11 18:50:03 vcsoaknas01 kernel:   next_to_clean        <24>
Mar 11 18:50:03 vcsoaknas01 kernel: buffer_info[next_to_clean]
Mar 11 18:50:03 vcsoaknas01 kernel:   time_stamp           <1004de0b1>
Mar 11 18:50:03 vcsoaknas01 kernel:   next_to_watch        <24>
Mar 11 18:50:03 vcsoaknas01 kernel:   jiffies              <1004df3e7>
Mar 11 18:50:03 vcsoaknas01 kernel:   next_to_watch.status <0>
Mar 11 18:50:05 vcsoaknas01 kernel: e1000: eth0: e1000_clean_tx_irq:
Detected Tx Unit Hang
Mar 11 18:50:05 vcsoaknas01 kernel:   Tx Queue             <0>
Mar 11 18:50:05 vcsoaknas01 kernel:   TDH                  <f7>
Mar 11 18:50:05 vcsoaknas01 kernel:   TDT                  <f7>
Mar 11 18:50:05 vcsoaknas01 kernel:   next_to_use          <f7>
Mar 11 18:50:05 vcsoaknas01 kernel:   next_to_clean        <24>
Mar 11 18:50:05 vcsoaknas01 kernel: buffer_info[next_to_clean]
Mar 11 18:50:05 vcsoaknas01 kernel:   time_stamp           <1004de0b1>
Mar 11 18:50:05 vcsoaknas01 kernel:   next_to_watch        <24>
Mar 11 18:50:05 vcsoaknas01 kernel:   jiffies              <1004dfbb7>
Mar 11 18:50:05 vcsoaknas01 kernel:   next_to_watch.status <0>
Mar 11 18:50:06 vcsoaknas01 kernel: NETDEV WATCHDOG: eth0: transmit
timed out
Mar 11 18:50:09 vcsoaknas01 kernel: e1000: eth0: e1000_watchdog_task:
NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None