Public bug reported: I am using Qemu on 64 bit x86 platform, operating system ubuntu 14.04. I cloned the latest version of qemu from github and installed on my system.
I booted the 1st VM with the instruction: sudo qemu-system-x86_64 -m 1024 -smp 4 -cpu host -hda /var/lib/libvirt/images/vm1p4.img -boot c -enable-kvm -no-reboot -net none -chardev socket,id=char1,path=/usr/local/var/run/openvswitch/vhost- user1 -netdev type=vhost-user,id=mynet1,chardev=char1,vhostforce -device virtio-net-pci,mac=00:00:00:00:00:01,netdev=mynet1 -object memory- backend-file,id=mem,size=1024M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem -mem-prealloc It is was launched successfully. Then I lanched the second VM with the instruction: sudo qemu-system-x86_64 -m 1024 -smp 4 -cpu host -hda /var/lib/libvirt/images/vm1p4-2.img -boot c -enable-kvm -no-reboot -net none -chardev socket,id=char2,path=/usr/local/var/run/openvswitch/vhost- user2 -netdev type=vhost-user,id=mynet2,chardev=char2,vhostforce -device virtio-net-pci,mac=00:00:00:00:00:02,netdev=mynet2 -object memory- backend-file,id=mem,size=1024M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem -mem-prealloc Qemu crashed right away. Plea see the log below. sudo qemu-system-x86_64 -m 1024 -smp 4 -cpu host -hda /var/lib/libvirt/images/vm1p4-2.img -boot c -enable-kvm -no-reboot -net none -chardev socket,id=char2,path=/usr/local/var/run/openvswitch/vhost-user2 -netdev type=vhost-user,id=mynet2,chardev=char2,vhostforce -device virtio-net-pci,mac=00:00:00:00:00:02,netdev=mynet2 -object memory-backend-file,id=mem,size=1024M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem -mem-prealloc KVM internal error. Suberror: 1 emulation failure EAX=000cc765 EBX=00000007 ECX=000cc6ac EDX=0000df00 ESI=1ff00000 EDI=0000d5d7 EBP=ffffffff ESP=0000f9ce EIP=d5d70000 EFL=00010012 [----A--] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =df00 000df000 ffffffff 00809300 CS =f000 000f0000 ffffffff 00809b00 SS =df00 000df000 ffffffff 00809300 DS =df00 000df000 ffffffff 00809300 FS =0000 00000000 ffffffff 00809300 GS =0000 00000000 ffffffff 00809300 LDT=0000 00000000 0000ffff 00008200 TR =0000 00000000 0000ffff 00008b00 GDT= 00000000 00000000 IDT= 00000000 000003ff CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000000 Code=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ** Affects: qemu Importance: Undecided Status: New -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1569053 Title: Qemu crashes when I start a second VM from command line Status in QEMU: New Bug description: I am using Qemu on 64 bit x86 platform, operating system ubuntu 14.04. I cloned the latest version of qemu from github and installed on my system. I booted the 1st VM with the instruction: sudo qemu-system-x86_64 -m 1024 -smp 4 -cpu host -hda /var/lib/libvirt/images/vm1p4.img -boot c -enable-kvm -no-reboot -net none -chardev socket,id=char1,path=/usr/local/var/run/openvswitch /vhost-user1 -netdev type=vhost- user,id=mynet1,chardev=char1,vhostforce -device virtio-net- pci,mac=00:00:00:00:00:01,netdev=mynet1 -object memory-backend- file,id=mem,size=1024M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem -mem-prealloc It is was launched successfully. Then I lanched the second VM with the instruction: sudo qemu-system-x86_64 -m 1024 -smp 4 -cpu host -hda /var/lib/libvirt/images/vm1p4-2.img -boot c -enable-kvm -no-reboot -net none -chardev socket,id=char2,path=/usr/local/var/run/openvswitch /vhost-user2 -netdev type=vhost- user,id=mynet2,chardev=char2,vhostforce -device virtio-net- pci,mac=00:00:00:00:00:02,netdev=mynet2 -object memory-backend- file,id=mem,size=1024M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem -mem-prealloc Qemu crashed right away. Plea see the log below. sudo qemu-system-x86_64 -m 1024 -smp 4 -cpu host -hda /var/lib/libvirt/images/vm1p4-2.img -boot c -enable-kvm -no-reboot -net none -chardev socket,id=char2,path=/usr/local/var/run/openvswitch/vhost-user2 -netdev type=vhost-user,id=mynet2,chardev=char2,vhostforce -device virtio-net-pci,mac=00:00:00:00:00:02,netdev=mynet2 -object memory-backend-file,id=mem,size=1024M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem -mem-prealloc KVM internal error. Suberror: 1 emulation failure EAX=000cc765 EBX=00000007 ECX=000cc6ac EDX=0000df00 ESI=1ff00000 EDI=0000d5d7 EBP=ffffffff ESP=0000f9ce EIP=d5d70000 EFL=00010012 [----A--] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =df00 000df000 ffffffff 00809300 CS =f000 000f0000 ffffffff 00809b00 SS =df00 000df000 ffffffff 00809300 DS =df00 000df000 ffffffff 00809300 FS =0000 00000000 ffffffff 00809300 GS =0000 00000000 ffffffff 00809300 LDT=0000 00000000 0000ffff 00008200 TR =0000 00000000 0000ffff 00008b00 GDT= 00000000 00000000 IDT= 00000000 000003ff CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000000 Code=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1569053/+subscriptions