Thanks Sugesh for your response. I have 4 1G hugepages allocated and the VM is requesting 3G memory.
$ cat /proc/cmdline BOOT_IMAGE=/vmlinuz-4.5.7-200.fc23.x86_64 root=/dev/mapper/fedora--desktop-root ro rd.lvm.lv=fedora-desktop/root rd.lvm.lv=fedora-desktop/swap default_hugepagesz=1G hugepagesz=1G hugepages=4 rhgb quiet $ grep Huge /proc/meminfo AnonHugePages: 0 kB HugePages_Total: 4 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 1048576 kB Regards, Charlie On Tue, Aug 2, 2016 at 5:23 PM, Chandran, Sugesh <sugesh.chand...@intel.com> wrote: > > > > > *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? * > > > > >
_______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
