9.0-RELEASE and RealTek (re) watchdog timeout

Rob lists at midsummerdream.org
Sat Jan 14 00:37:46 UTC 2012

I'm attempting to transfer a large amount of data from one zfs pool on 
one system to a zfs pool on another via zfs send/receive.  The sender is 
8.2 and the receiver is 9.0.  The receiver is using a re network driver, 
and sometime during the transfer all connectivity is lost with the 
receiver.  Looking at the machine, I see:

re0: watchdog timeout
re0: link state changed to DOWN
re0: link state changed to UP

every 5-15 seconds in the logs.  I've tried disabling MSI/MSI-X, but 
that didn't have an affect.  The only way I've gotten connectivity back 
was to reboot the machine.  Has anyone seen this before?  Any ideas?

pciconf of the network interface:

     vendor     = 'Realtek Semiconductor Co., Ltd.'
     device     = 'RTL8111/8168B PCI Express Gigabit Ethernet controller'
     class      = network
     subclass   = ethernet
     cap 01[40] = powerspec 3  supports D0 D1 D2 D3  current D0
     cap 05[50] = MSI supports 1 message, 64 bit
     cap 10[70] = PCI-Express 2 endpoint IRQ 2 max data 128(128) link x1(x1)
     cap 11[b0] = MSI-X supports 4 messages in map 0x20 enabled
     cap 03[d0] = VPD
ecap 0001[100] = AER 1 0 fatal 0 non-fatal 0 corrected
ecap 0002[140] = VC 1 max VC0
ecap 0003[160] = Serial 1 1234567812345678


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