em 6.6.6 - watchdog timeout

Hi,

After the update of em to 6.6.6 last, I experience watchdog timeouts on a server running 6-STABLE.

I have two identical servers with Intel D915GAV boards. Both have Intel PRO/1000 PCI-Express network cards.

Server balder:
em0: <Intel(R) PRO/1000 Network Connection Version - 6.6.6> port 0xac00-0xac1f mem 0xff600000-0xff61ffff,0xff620000-0xff63ffff irq 16 at device 0.0 on pci5
em0: Ethernet address: 00:1b:21:00:48:c4
em0: [FAST]

# vmstat -i
interrupt total rate
irq1: atkbd0 3 0
irq4: sio0 2 0
irq6: fdc0 12 0
irq14: ata0 68 0
irq16: em0 uhci3 219828879 450
irq19: uhci1++ 4287947 8
irq22: ahc0 232717293 476
irq23: uhci0 ehci0 1 0
cpu0: timer 976552804 2000
Total 1433387009 2935

# netstat -i
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll
em0 1500 <Link#1> 00:1b:21:00:48:c4 209880531 773 206555522 84 0
em0 1500 10.255.253/24 balder 215210996 - 212337968 - -
plip0 1500 <Link#2> 0 0 0 0 0
lo0 16384 <Link#3> 12040055 0 12055326 0 0
lo0 16384 fe80:3::1 fe80:3::1 0 - 0 - -
lo0 16384 localhost ::1 6 - 6 - -
lo0 16384 your-net localhost 6249979 - 6249980 - -

00:00.0 Host bridge: Intel Corporation 82915G/P/GV/GL/PL/910GL Memory Controller Hub (rev 04)
00:01.0 PCI bridge: Intel Corporation 82915G/P/GV/GL/PL/910GL PCI Express Root Port (rev 04)
00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL Integrated Graphics Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 3 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 4 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #4 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d3)
00:1f.0 ISA bridge: Intel Corporation 82801FB/FR (ICH6/ICH6R) LPC Interface Bridge (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) IDE Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus Controller (rev 03)
05:00.0 Ethernet controller: Intel Corporation 82572EI Gigabit Ethernet Controller (Copper) (rev 06)
06:01.0 SCSI storage controller: Adaptec AHA-2940U/UW/D / AIC-7881U (rev 01)


Server midgard:
em0: <Intel(R) PRO/1000 Network Connection Version - 6.2.9> port 0xac00-0xac1f mem 0xff500000-0xff51ffff,0xff520000-0xff53ffff irq 16 at device 0.0 on pci5
em0: Ethernet address: 00:15:17:0e:05:f7
admglz@midgard> vmstat -i
interrupt total rate
irq1: atkbd0 11 0
irq4: sio0 2142746 0
irq6: fdc0 14 0
irq14: ata0 252 0
irq16: em0+ 666640101 164
irq19: atapci1+ 7932757 1
irq22: ahc0 87074425 21
cpu0: timer 3807810138 937
Total 4571600444 1125

admglz@midgard> netstat -i
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll
em0 1500 <Link#1> 00:15:17:0e:05:f7 343771280 0 474609731 0 0
em0 1500 10.255.253/24 midgard 347467842 - 478700485 - -
plip0 1500 <Link#2> 0 0 0 0 0
lo0 16384 <Link#3> 16821054 0 16947668 0 0
lo0 16384 fe80:3::1 fe80:3::1 0 - 0 - -
lo0 16384 localhost ::1 2610 - 2610 - -
lo0 16384 your-net localhost 12616879 - 12616879 - -
lo0 16384 10.255.253.12 appsrv1 0 - 0 - -
lo0 16384 10.255.253.10 ca.glz.hidden-pow 0 - 0 - -
lo0 16384 10.255.253.11 test 0 - 0 - -
lo0 16384 10.255.253.13 secure 0 - 0 - -
lo0 16384 10.255.253.18 rscds.hidden-powe 7 - 0 - -

midgard# lspci
00:00.0 Host bridge: Intel Corporation 82915G/P/GV/GL/PL/910GL Memory Controller Hub (rev 04)
00:01.0 PCI bridge: Intel Corporation 82915G/P/GV/GL/PL/910GL PCI Express Root Port (rev 04)
00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL Integrated Graphics Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 3 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 4 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #4 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d3)
00:1f.0 ISA bridge: Intel Corporation 82801FB/FR (ICH6/ICH6R) LPC Interface Bridge (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) IDE Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus Controller (rev 03)
01:00.0 SCSI storage controller: Triones Technologies, Inc. Unknown device 2310 (rev 02)
05:00.0 Ethernet controller: Intel Corporation 82572EI Gigabit Ethernet Controller (Copper) (rev 06)
06:01.0 SCSI storage controller: Adaptec AHA-2940U/UW/D / AIC-7881U (rev 01)
06:02.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller (rev 46)


When running netstat between servers balder and midgard, server balder get watchdog timeouts and resets the connection for a few seconds.
Oct 19 13:12:47 balder kernel: em0: watchdog timeout -- resetting
Oct 19 13:12:47 balder kernel: em0: link state changed to DOWN
Oct 19 13:12:51 balder kernel: em0: link state changed to UP

I have switched the cable between the two servers but get exactly the same problem. The switch is a Netgear GS108T with the latest firmware.

The resp. dmesg.boot are attached.

Please let me know if there is any other information I can supply to clear this.

Best regards,
Göran L

................................................... the future isMobile

Goran Lowkrantz <goran.lowkrantz@xxxxxxxxxxxx>
System Architect, iaMobile AB
Sandviksgatan 81, PO Box 58, S-971 03 Luleå, Sweden
Mobile: +46(0)70-587 87 82
http://www.ismobile.com ...............................................

Attachment: balder.dmesg.boot
Description: Binary data

Attachment: midgard.dmesg.boot
Description: Binary data

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