| Message ID | 1241600198.5172.36.camel@localhost.localdomain |
|---|---|
| State | Rejected, archived |
| Delegated to: | David Miller |
| Headers | show |
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index 183235d..3ee00a5 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -3597,6 +3597,10 @@ void igb_update_stats(struct igb_adapter *adapter) adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc; adapter->net_stats.rx_missed_errors = adapter->stats.mpc; + /* Note RNBC (Receive No Buffers Count) is an overflow + * indication, thus not necessary a dropped packet. */ + adapter->net_stats.rx_fifo_errors = adapter->stats.rnbc; + /* Tx Errors */ adapter->net_stats.tx_errors = adapter->stats.ecol + adapter->stats.latecol;
The RNBC (Receive No Buffers Count) register for the 82576, indicate that frames were received when there were no available buffers in host memory to store those frames (receive descriptor head and tail pointers were equal). The packet is still received by the NIC if there is space in the FIFO I have shown that this situation can arise when the kernel is too busy else where. As the the RNBC value is not necessary a packet drop, I choose to store the RNBC value in net_stats.rx_fifo_errors. Saving the stats in dev->net_stats makes it visible via /proc/net/dev as "fifo", and thus viewable to ifconfig as "overruns" and 'netstat -i' as "RX-OVR". The Receive No Buffers Count (RNBC) can already be queried by ethtool -S as "rx_no_buffer_count". Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk> --- drivers/net/igb/igb_main.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html