[tech] Murasoi dropouts

[Matt Johnston]

Since this is all still broken, shall I just order 2x cheap
gigabit NICs for murasoi?

$15 http://www.mwave.com.au/product/tplink-tg3468-gigabit-pci-express-network-adapter-aa38208
$2.50 http://www.mwave.com.au/product/tplink-tllpbtg3468-low-profile-bracket-for-tg3468-ab55234

rtl8168b chip, should be fine in Linux with rtl8169 driver I guess.

Matt


On Fri, Jun 26, 2015 at 09:39:12AM +0800, James Andrewartha wrote:
> If you've been paying close attention, you may have noticed that murasoi's 
> network is dropping occasionally. dmesg shows:
> 
> [Fri Jun 26 07:48:25 2015] e1000 0000:01:01.0 eth0: Detected Tx Unit Hang
>   Tx Queue             <0>
>   TDH                  <df>
>   TDT                  <2e>
>   next_to_use          <2e>
>   next_to_clean        <dd>
> buffer_info[next_to_clean]
>   time_stamp           <10b250914>
>   next_to_watch        <e1>
>   jiffies              <10b2513b2>
>   next_to_watch.status <0>
> [Fri Jun 26 07:48:25 2015] e1000 0000:01:01.0 eth0: Reset adapter
> [Fri Jun 26 07:48:29 2015] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
> 
> Some quick googling returns 
> http://blog.bradiceanu.net/2010/11/28/netdev-watchdog-eth0-transmit-timed-out/ 
> which suggests building a more recent version of the e1000 driver (which 
> is 8.0.35 vs 3.16's 7.3.21-k8-NAPI) and setting in modprobe.d:
> 
> options e1000 ignore_64bit_dma=1
> 
> Further discussion is happening in #ucc
> 
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