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

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Date:	Thu, 9 Apr 2015 11:08:03 -0700
From:	Prashant Sreedharan <prashant@...adcom.com>
To:	Ian Jackson <Ian.Jackson@...citrix.com>
CC:	Michael Chan <mchan@...adcom.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>,
	Vlad Yasevich <vyasevich@...il.com>,
	"Nithin Nayak Sujir" <nsujir@...adcom.com>,
	<xen-devel@...ts.xensource.com>, <netdev@...r.kernel.org>
Subject: Re: tg3 NIC driver bug in 3.14.x under Xen [and 3 more messages]

On Thu, 2015-04-09 at 18:25 +0100, Ian Jackson wrote:

> root@...bug:~# 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@...bug:~# 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 
> 
> root@...bug:~#
> 
> It appears therefore that packets are being corrupted on the receive
> path, and the kernel then drops them (as misaddressed).
> 
thanks for the repo, the RX drop counter is updated at few places in the
driver. Please use the attached debug patch and provide the logs

View attachment "tg3_debug_1.patch" of type "text/x-patch" (1977 bytes)