Re: [libvirt] memory pinning problem

Am Freitag, 6. September 2013, 12:10:04 schrieb Daniel P. Berrange: > On Tue, Aug 27, 2013 at 09:09:25AM +0200, David Weber wrote: > > Hi, > > > > we try to use vcpu pinning on a 2 socket server with Intel Xeon E5620 > > cpus, HT enabled and 2*6*16GiB Ram but experience problems if we try to > > start a guest on the second socket: > > error: Failed to start domain test > > error: internal error: process exited while connecting to monitor: > > kvm_init_vcpu failed: Cannot allocate memory # virsh freecell 0 0: 86071624 KiB # virsh freecell 1 1: 75258628 KiB # virsh edit test <domain type='kvm'> <name>test</name> <uuid>08cdc389-78bf-450c-89f4-b4728edabdbf</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static' cpuset='4-7'>1</vcpu> <numatune> <memory mode='strict' nodeset='1'/> </numatune> <os> <type arch='x86_64' machine='pc-i440fx-1.5'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-kvm</emulator> <controller type='usb' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='pci' index='0' model='pci-root'/> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </memballoon> </devices> </domain> # virsh start test error: Failed to start domain test error: internal error: process exited while connecting to monitor: kvm_init_vcpu failed: Cannot allocate memory Allocating memory on this node with numactl works fine # numactl --cpubind=1 --membind=1 -- dd if=/dev/zero of=/dev/null bs=2G count=1 0+1 records in 0+1 records out 2147479552 bytes (2.1 GB) copied, 0.60816 s, 3.5 GB/s