I'd like to report that we're running into this issue also, in our case on systems that are based on the Intel S5520UR Server Board, running 8.1-RELEASE. If the ichwd driver is loaded we see the same messages, and network communication via the igb nics is non-functional.

Have you had any luck?

Thanks,
Charles

 Charles Owens
 Great Bay Software, Inc.



On 1/3/11 4:02 PM, Robin Sommer wrote:
Hello all,

quite a while ago I asked about the problem below. Unfortunately, I
haven't found a solution yet and I'm actually still seeing these
timeouts after just upgrading to 8.2-RC1. Any further ideas on what
could be triggering them, or how I could track down the cause?

Thanks,

Robin

On Thu, Jul 29, 2010 at 14:56 -0700, I wrote:

Since upgrading from 8.0 to 8.1-RELEASE, I'm seeing lots of messages
like those below on all my SuperMicro SBI-7425C-T3 blades. There's
almost no traffic on those interfaces.

Any idea?

Thanks,

Robin

Jul 29 13:01:18 blade0 kernel: igb1: Watchdog timeout -- resetting
Jul 29 13:01:18 blade0 kernel: igb1: Queue(0) tdh = 256, hw tdt = 266
Jul 29 13:01:18 blade0 kernel: igb1: TX(0) desc avail = 1013,Next TX to Clean = 
255
Jul 29 13:01:18 blade0 kernel: igb1: link state changed to DOWN
Jul 29 13:01:18 blade0 kernel: igb1: link state changed to UP
Jul 29 13:01:29 blade0 kernel: igb1: Watchdog timeout -- resetting
Jul 29 13:01:29 blade0 kernel: igb1: Queue(0) tdh = 0, hw tdt = 10
Jul 29 13:01:29 blade0 kernel: igb1: TX(0) desc avail = 1014,Next TX to Clean = 0
Jul 29 13:01:29 blade0 kernel: igb1: link state changed to DOWN
Jul 29 13:01:29 blade0 kernel: igb1: link state changed to UP
Jul 29 13:01:46 blade0 kernel: igb1: Watchdog timeout -- resetting
Jul 29 13:01:46 blade0 kernel: igb1: Queue(0) tdh = 32, hw tdt = 33
Jul 29 13:01:46 blade0 kernel: igb1: TX(0) desc avail = 1022,Next TX to Clean = 
31
Jul 29 13:01:46 blade0 kernel: igb1: link state changed to DOWN
Jul 29 13:01:46 blade0 kernel: igb1: link state changed to UP
Jul 29 13:01:57 blade0 kernel: igb1: Watchdog timeout -- resetting
Jul 29 13:01:57 blade0 kernel: igb1: Queue(0) tdh = 0, hw tdt = 10
Jul 29 13:01:57 blade0 kernel: igb1: TX(0) desc avail = 1014,Next TX to Clean = 0
Jul 29 13:01:57 blade0 kernel: igb1: link state changed to DOWN
Jul 29 13:01:58 blade0 kernel: igb1: link state changed to UP
Jul 29 13:02:13 blade0 kernel: igb1: Watchdog timeout -- resetting

grep igb /var/run/dmesg.boot
igb0:<Intel(R) PRO/1000 Network Connection version - 1.9.5>  port 0x2000-0x201f 
mem 0xfc940000-0xfc95ffff,0xfc920000-0xfc93ffff,0xfc900000-0xfc903fff irq 16 at 
device 0.0 on pci4
igb0: [FILTER]
igb0: Ethernet address: 00:30:48:9e:22:00
igb1:<Intel(R) PRO/1000 Network Connection version - 1.9.5>  port 0x2020-0x203f 
mem 0xfc980000-0xfc99ffff,0xfc960000-0xfc97ffff,0xfc904000-0xfc907fff irq 17 at 
device 0.1 on pci4
igb1: [FILTER]
igb1: Ethernet address: 00:30:48:9e:22:01

pciconf -lv
[...]
i...@pci0:4:0:0: class=0x020000 card=0x10a915d9
chip=0x10a98086 rev=0x02 hdr=0x00
     vendor     = 'Intel Corporation'
     device     = '82575EB Gigabit Backplane Connection'
     class      = network
     subclass   = ethernet
i...@pci0:4:0:1:        class=0x020000 card=0x10a915d9
chip=0x10a98086 rev=0x02 hdr=0x00
     vendor     = 'Intel Corporation'
     device     = '82575EB Gigabit Backplane Connection'
     class      = network
     subclass   = ethernet
[...]

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