Hi,
WIth OVS + DPDK, after i add a port with MTU size greater than >1894, if i
do port delete and re-add the port with same MTU, it leads to following
memory pool error and MTU is set to 1500.
While re-adding the port it the MTU is configured less than 1894, issue is
not seen. To recover, i need to kill the OVS process and start it again.
ovs-vswitchd[14264]: ovs|00002|dpdk|ERR|Insufficient memory to create
memory pool for netdev dpdkvhostuser0, with MTU 1895 on socket 0
Issue is not seen when ports use MTU size <=1894. Let me know if additional
logs are needed.
OVS version: 2.6.1 and DPDK: 16.07
===========================
root@hp-dl20:/# ovs-vsctl --version
ovs-vsctl (Open vSwitch) 2.6.1
DB Schema 7.14.0
root@hp-dl20:/# ovs-vsctl show
176cae66-f14b-436e-9cb2-a7caa054c481
Issue case with MTU 1895: (when port with mtu 1895 is readded error is
seen, able to configure MTU <=1894)
====================
ovs-vsctl add-br trail -- set bridge trail datapath_type=netdev
ovs-vsctl add-port trail dpdkvhostuser0 -- set Interface dpdkvhostuser0
type=dpdkvhostuser -- set Interface dpdkvhostuser0 mtu_request=1895
root@hp-dl20:/# ovs-vsctl get interface dpdkvhostuser0 mtu
1895
root@hp-dl20:/# ovs-vsctl show
d5b44a7b-62c1-4096-82a4-722833d3d154
Bridge trail
Port "dpdkvhostuser0"
Interface "dpdkvhostuser0"
type: dpdkvhostuser
Port trail
Interface trail
type: internal
ovs-vsctl del-port trail dpdkvhostuser0
ovs-vsctl add-port trail dpdkvhostuser0 -- set Interface dpdkvhostuser0
type=dpdkvhostuser -- set Interface dpdkvhostuser0 mtu_request=1895
2017-02-15T15:39:23.830Z|00002|dpdk|ERR|Insufficient memory to create
memory pool for netdev dpdkvhostuser0, with MTU 1895 on socket 0
ovs-vsctl get interface dpdkvhostuser0 mtu
1500
root@hp-dl20:/# ovs-vsctl set Interface dpdkvhostuser0 mtu_request=1894
root@hp-dl20:/# ovs-vsctl get interface dpdkvhostuser0 mtu
1894
Issue case with MTU 1895:
====================
pkill ovs and restart OVS
root 15206 0.0 0.0 23180 4788 ? Ss 15:42 0:00
/usr/sbin/ovsdb-server --remote=punix:/var/run/openvswitch/db.sock
--remote=db:Open_vSwitch,Open_vSwitch,manager_options
--private-key=db:Open_vSwitch,SSL,private_key
--certificate=db:Open_vSwitch,SSL,certificate
--bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert --pidfile --detach
--verbose=err
root 15213 10.1 0.0 1836764 5960 ? Ssl 15:42 0:01
/usr/sbin/ovs-vswitchd --pidfile --log-file --verbose=err --detach
ovs-vsctl add-br trail -- set bridge trail datapath_type=netdev
ovs-vsctl add-port trail dpdkvhostuser0 -- set Interface dpdkvhostuser0
type=dpdkvhostuser -- set Interface dpdkvhostuser0 mtu_request=1894
root@hp-dl20:/# ovs-vsctl get interface dpdkvhostuser0 mtu
1894
ovs-vsctl del-port trail dpdkvhostuser0
ovs-vsctl add-port trail dpdkvhostuser0 -- set Interface dpdkvhostuser0
type=dpdkvhostuser -- set Interface dpdkvhostuser0 mtu_request=1894
ovs-vsctl get interface dpdkvhostuser0 mtu
1894
When moved from 1894 to 1895
========================
pkill ovs and restart OVS
ovs-vsctl add-br trail -- set bridge trail datapath_type=netdev
ovs-vsctl add-port trail dpdkvhostuser0 -- set Interface dpdkvhostuser0
type=dpdkvhostuser -- set Interface dpdkvhostuser0 mtu_request=1894
ovs-vsctl get interface dpdkvhostuser0 mtu
1894
ovs-vsctl del-port trail dpdkvhostuser0
ovs-vsctl add-port trail dpdkvhostuser0 -- set Interface dpdkvhostuser0
type=dpdkvhostuser -- set Interface dpdkvhostuser0 mtu_request=1895
ovs-vsctl get interface dpdkvhostuser0 mtu
1895
ovs-vsctl del-port trail dpdkvhostuser0
ovs-vsctl add-port trail dpdkvhostuser0 -- set Interface dpdkvhostuser0
type=dpdkvhostuser -- set Interface dpdkvhostuser0 mtu_request=1895
2017-02-15T15:43:28.066Z|00002|dpdk|ERR|Insufficient memory to create
memory pool for netdev dpdkvhostuser0, with MTU 1895 on socket 0
ovs-vsctl get interface dpdkvhostuser0 mtu
1500
root@hp-dl20:/# uname -r
4.1.26-yocto-standard
root@hp-dl20:/# cat /proc/meminfo
HugePages_Total: 1536
HugePages_Free: 1024
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
Regards
Kapil.
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