igb watchdog timeouts

[Robin Sommer]

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 
[...]
igb0 at 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
igb1 at 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
[...]


-- 
Robin Sommer * Phone +1 (510) 666-2886 * robin at icir.org 
ICSI/LBNL    * Fax   +1 (510) 666-2956 *   www.icir.org