Regards _Sugesh
From: discuss [mailto:discuss-boun...@openvswitch.org] On Behalf Of Charlie Li Sent: Tuesday, August 2, 2016 4:28 PM To: discuss@openvswitch.org Subject: [ovs-discuss] unable to map backing store for hugepages: Cannot allocate memory Hi All, I am trying to use dpdkvhostuser to pass traffic to VM. Here is my basic system configuration. Host and VM OS: Fedora server 23 DPDK 2.2.0 OVS 2.50 QEMU 2.4.1 When I tried to start the VM, it got the following error: qemu-system-x86_64: -object memory-backend-file,id=mem,size=3072M,mem-path=/dev/hugepages,share=on: unable to map backing store for hugepages: Cannot allocate memory I must did some thing wrong. Any help is appreciated. Thanks, Charlie More details ------------------------------------------------------------------------------------------------------------------- [cli@cli-desktop ~]$ grep Huge /proc/meminfo AnonHugePages: 0 kB HugePages_Total: 4 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 1048576 kB [cli@cli-desktop utilities]$ sudo ./ovs-vsctl show 4fcf27a6-edbd-4770-ab39-f440e3532bcc Bridge "br0" Port "vhost0" Interface "vhost0" type: dpdkvhostuser Port "vhost1" Interface "vhost1" type: dpdkvhostuser Port "br0" Interface "br0" type: internal Port "dpdk1" Interface "dpdk1" type: dpdk Port "dpdk0" Interface "dpdk0" type: dpdk [cli@cli-desktop utilities]$ sudo ./ovs-vsctl list-ports br0 dpdk0 dpdk1 vhost0 vhost1 [cli@cli-desktop utilities]$ sudo ./ovs-ofctl dump-flows br0 NXST_FLOW reply (xid=0x4): cookie=0x0, duration=61391.667s, table=0, n_packets=0, n_bytes=0, idle_age=61391, in_port=1 actions=output:3 cookie=0x0, duration=61391.650s, table=0, n_packets=0, n_bytes=0, idle_age=61391, in_port=2 actions=output:4 cookie=0x0, duration=61391.632s, table=0, n_packets=0, n_bytes=0, idle_age=61391, in_port=3 actions=output:1 cookie=0x0, duration=61391.616s, table=0, n_packets=0, n_bytes=0, idle_age=61391, in_port=4 actions=output:2 [cli@cli-desktop utilities]$ sudo qemu-system-x86_64 -m 3072 -cpu host -hda /home/cli/VM1/FC23.qcow2 -boot c -enable-kvm -pidfile /home/cli/VM1/vm1.pid -monitor unix:/home/cli/VM1/vm1monitor,server,nowait -name 'FC23-VM1' -net none -no-reboot -object memory-backend-file,id=mem,size=3072M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem -mem-prealloc -chardev socket,id=char1,path=/usr/local/var/run/openvswitch/vhost0 -netdev type=vhost-user,id=net1,chardev=char1,vhostforce -device virtio-net-pci,netdev=net1,mac=00:00:00:00:00:01,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off,mrg_rxbuf=off -chardev socket,id=char2,path=/usr/local/var/run/openvswitch/vhost1 -netdev type=vhost-user,id=net2,chardev=char2,vhostforce -device virtio-net-pci,netdev=net2,mac=00:00:00:00:00:02,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off,mrg_rxbuf=off --nographic -vnc :14 qemu-system-x86_64: -object memory-backend-file,id=mem,size=3072M,mem-path=/dev/hugepages,share=on: unable to map backing store for hugepages: Cannot allocate m/emory [Sugesh] May be you are out of hugepages? How much memory you are allocating for OVS-DPDK?
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