[dpdk-users] OS hang when running helloworld example with two I210 NICs

[Michal Michalowski]

HI,

I have problem running helloworld example. The OS hangs and the only way
forward is to poweroff the box.

DPDK version 16.11.1
OS: Ubuntu 16.04 and 14.04
NICs:
18:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network
Connection (rev 03)
24:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network
Connection (rev 03)

The problem only appears when I have two NICs present. If I bind at
least one of them to uio_pci_generic and run helloworld the OS hangs.
If I try to use igb_uio the system hangs when binding the device.

I have narrowed it down a bit. The OS hangs when
e1000_get_media_type_82575 is executed. Line:   ctrl_ext =
E1000_READ_REG(hw, E1000_CTRL_EXT);
That line is reading memory mapped from resource0 of the device.

I have reproduced behaviour just by binding the device to
uio_pci_generic and putting it in "bus master" mode and the reading from
it's resour0.

The behaviour is not reproducible with just one NIC in place. Also if
the devices use igb driver and are in "bus master" I can read from
resource0.

Has anyone encountered similar problem?

Cheers,
Michal

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