[Qemu-devel] Qemu start VM in huge page without '-mem-prealloc' will get memory leak?

[Sam]

For qemu-2.6.0, in huge page (1G) environment, after kill the qemu process,
memory which is alloc for the vm could not be released. Detail is bellow.
Or should I use some specific command to stop vm? I want to know if there
someone has the same problem?

The start up command is:

CMD1="$QEMU_CMD -D qemu.log -trace events=qemu-events-all -enable-kvm -cpu
qemu64,+vmx,+ssse3,+sse4.1,+sse4.2,+x2apic,+aes,+avx,+vme,
+pat,+ss,+pclmulqdq,+xsave,level=13 -machine pc,accel=kvm -chardev
socket,id=hmqmondev,port=55908,host=127.0.0.1,nodelay,server,nowait -mon
chardev=hmqmondev,id=hmqmon,mode=readline -rtc
base=utc,clock=host,driftfix=none
-usb -device usb-tablet -daemonize -nodefaults -nodefconfig
-no-kvm-pit-reinjection -global kvm-pit.lost_tick_policy=discard -vga std
-k en-us -smp 8 -name gangyewei-qemutime-1 -m 40960 -boot order=cdn -vnc
:8,password -drive file=$DISK_0,if=none,id=drive_
0,format=qcow2,cache=none,aio=native -device virtio-blk-pci,id=dev_drive_0,
drive=drive_0,bus=pci.0,addr=0x5 -drive file=$DISK_1,if=none,id=drive_
1,format=qcow2,cache=none,aio=native -device virtio-blk-pci,id=dev_drive_1,
drive=drive_1,bus=pci.0,addr=0x6 -drive file=$DISK_2,if=none,id=drive_
2,format=qcow2,cache=none,aio=native -device virtio-blk-pci,id=dev_drive_2,
drive=drive_2,bus=pci.0,addr=0x7 -device ide-cd,drive=ide0-cd0,bus=ide.1,unit=1
-drive id=ide0-cd0,media=cdrom,if=none -chardev socket,id=char-n-52b49b80,
path=/usr/local/var/run/openvswitch/n-52b49b80,server -netdev
type=vhost-user,id=n-52b49b80,chardev=char-n-52b49b80,vhostforce=on -device
virtio-net-pci,netdev=n-52b49b80,mac=00:22:52:b4:9b:
80,id=netdev-n-52b49b80,addr=0xf$(nic_speed 10000) -object
memory-backend-file,id=mem,size=40960M,mem-path=/mnt/huge,share=on -numa
node,memdev=mem -pidfile $PID_FILE -chardev socket,path=/opt/cloud/
workspace/servers/4511f52a-f450-40d3-9417-a1e0a27ed507/qga.sock,server,nowait,id=qga0
-device virtio-serial -device virtserialport,chardev=qga0,
name=org.qemu.guest_agent.0"

The stop script is just kill this process.

the result of `cat /proc/meminfo` show memory is still there.