[ovs-discuss] [ovs-dev] rte_eal_init() error when using ovs-dpdk with secondary application.

Aaron Conole aconole at redhat.com
Thu Jun 15 15:28:57 UTC 2017

Junguk Cho <jmanbal at gmail.com> writes:

> Hi,
> I use ovs-dpdk (ovs-2.7, dpdk-16.11.1) with one application which talks to
> ovs by using ring device and "--proc-type=secondary" (secondary processes).
> It generally works well, but sometimes it shows this error.
> It seems it could not find correct memory mapping in the application.
> 2017-06-13 11:21:40.988 STDERR Thread-2 [INFO] EAL: Probing VFIO support...
> 2017-06-13 11:21:40.988 STDERR Thread-2 [INFO] EAL: WARNING: Address Space
> Layout Randomization (ASLR) is enabled in the kernel.
> 2017-06-13 11:21:40.988 STDERR Thread-2 [INFO] EAL:    This may cause
> issues with mapping memory into secondary processes
> 2017-06-13 11:21:40.989 STDERR Thread-2 [INFO] EAL: Could not mmap
> 17146314752 <(714)%20631-4752> bytes in /dev/zero at [0x7f662c800000], got
> [0x7f6506000000] - please use '--base-virtaddr' option
> 2017-06-13 11:21:40.989 STDERR Thread-2 [INFO] EAL: It is recommended to
> disable ASLR in the kernel and retry running both primary and secondary
> processes
> 2017-06-13 11:21:40.990 STDERR Thread-2 [INFO] PANIC in rte_eal_init():
> 2017-06-13 11:21:40.990 STDERR Thread-2 [INFO] Cannot init memory
> I tried to disable ASLR, but it did not work.
> Does anyone have a similar situation?
> Based on this page (https://github.com/collectd/collectd/issues/2284), this
> is known issue and it seemed we can avoid this with "--base-virtaddr"
> option.
> Does anyone know how to use this option in ovs-dpdk?

You will need to use populate this option into other_config:dpdk-extra
in the ovsdb.

  ovs-vsctl --no-wait set Open_vSwitch \
      . other_config:dpdk-extra="--base-virtaddr=..."

I don't know the base virtual address value you should use, however.


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