CFT: vr(4)

Marcin Wisnicki mwisnicki+freebsd at
Sun Feb 10 15:59:36 UTC 2008

On Mon, 04 Feb 2008 17:47:44 +0000, Marcin Wisnicki wrote:

> I'm not 100% sure if this is all that is required for RELENG6, but it
> works wonderfully so far.
> Even fixed Rx errors I was seeing for some time and didn't have the time
> to investigate whether they were caused by some recent commit to releng6
> (like the last mfc) or simply a hardware failure.
> Thank you Pyun YongHyeon!
>>From my dmesg:
> vr0: <VIA VT6102 Rhine II 10/100BaseTX> port 0xd800-0xd8ff mem
> 0xdffefd00-0xdffefdff irq 5 at device 18.0 on pci0 vr0: Quirks: 0x0
> vr0: Revision: 0x74
> miibus1: <MII bus> on vr0
> ukphy0: <Generic IEEE 802.3u media interface> on miibus1 ukphy0: 
> 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto vr0: Ethernet
> address: 42:00:e6:65:9b:11 vr0: [GIANT-LOCKED]

Just noticed in dmesg after reboot:

vr0: Tx underrun -- increasing Tx threshold(128 -> 256)
vr0: Tx underrun -- increasing Tx threshold(256 -> 512)
vr0: Tx underrun -- increasing Tx threshold(512 -> 1024)
vr0: Tx underrun -- using store and forward mode
vr0: Tx underrun --

at this moment I started copying files in and out using samba
and then last message started to repeat for some time with decreasing 
frequency until finally:

vr0: watchdog timeout

and no more errors were reported.

Despite the errors in dmesg everything seems to work fine at all times 
with samba tx performance of 9.5mb/s and rx of 8.5mb/s using Vista as a 

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