Re: [Xen-devel] tg3 NIC driver bug in 3.14.x under Xen [and 3 more messages]

[Michael Chan <mchan@xxxxxxxxxxxx>]

On Thu, 2015-04-09 at 18:25 +0100, Ian Jackson wrote:
> root@bedbug:~# ethtool -S eth0 | grep -v ': 0$'
> NIC statistics:
>      rx_octets: 8196868
>      rx_ucast_packets: 633
>      rx_mcast_packets: 1
>      rx_bcast_packets: 123789
>      tx_octets: 42854
>      tx_ucast_packets: 9
>      tx_mcast_packets: 8
>      tx_bcast_packets: 603
> root@bedbug:~# ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr 00:13:72:14:c0:51  
>           inet addr:10.80.249.102  Bcast:10.80.251.255
>           Mask:255.255.252.0
>           inet6 addr: fe80::213:72ff:fe14:c051/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:124774 errors:0 dropped:88921 overruns:0 frame:0
>           TX packets:620 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:8222158 (7.8 MiB)  TX bytes:42854 (41.8 KiB)
>           Interrupt:17 

The dropped counter reported by ifconfig is 2 counters combined:
rx_dropped + rx_missed_errors.  Since ethtool -S is not reporting any
rx_discards, all the drops should be caused by tg3_rx().  We can drop
because the descriptor shows error or we cannot allocate SKB.

Can you check to see if your kernel source has this tg3 patch applied?

tg3: Don't check undefined error bits in RXBD
d7b95315cc7f441418845a165ee56df723941487
> 
> 


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