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Description of problem: while quit destination guest during migrating qemu-kvm coredump Version-Release number of selected component (if applicable): Buildinformation kernel-4.18.0-48.el8.ppc64le qemu-kvm-3.1.0-0.module+el8+2266+616cf026.next.candidate.ppc64le How reproducible: Approximate 10% Steps to Reproduce: 1.Source guest /usr/libexec/qemu-kvm \ -name 'avocado-vt-vm1' \ -sandbox off \ -machine pseries \ -nodefaults \ -device VGA,bus=pci.0,addr=0x2 \ -chardev socket,id=serial_id_serial0,path=/tmp/111,server,nowait \ -device spapr-vty,reg=0x30000000,chardev=serial_id_serial0 \ -device nec-usb-xhci,id=usb1,bus=pci.0,addr=0x3 \ -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pci.0,addr=0x4 \ -drive id=drive_image1,if=none,snapshot=off,aio=threads,cache=none,format=qcow2,file=/home/kar/vt_test_images/rhel80-ppc64le-virtio-scsi.qcow2 \ -device scsi-hd,id=image1,drive=drive_image1 \ -device virtio-net-pci,mac=9a:31:32:33:34:35,id=idQh8pOj,vectors=4,bus=pci.0,addr=0x5 \ -m 4096,slots=4,maxmem=32G \ -object memory-backend-ram,size=1G,policy=default,id=mem-mem1 \ -device pc-dimm,node=1,id=dimm-mem1,memdev=mem-mem1 \ -object memory-backend-ram,size=1G,policy=default,id=mem-mem2 \ -device pc-dimm,node=0,id=dimm-mem2,memdev=mem-mem2 \ -smp 8,maxcpus=8,cores=4,threads=1,sockets=2 \ -numa node,nodeid=0 \ -numa node,nodeid=1 \ -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \ -vnc :3 \ -rtc base=utc,clock=host \ -boot order=cdn,once=c,menu=off,strict=off \ -enable-kvm \ -monitor stdio 2.Add memory to source guest (qemu) object_add memory-backend-ram,size=1G,policy=default,id=mem-plug1 (qemu) device_add pc-dimm,memdev=mem-plug1,node=0,id=dimm-plug1 (qemu) object_add memory-backend-ram,size=1G,policy=default,id=mem-plug2 (qemu) device_add pc-dimm,memdev=mem-plug2,node=1,id=dimm-plug2 3.boot up destination guest /usr/libexec/qemu-kvm \ -name 'avocado-vt-vm1' \ -sandbox off \ -machine pseries \ -nodefaults \ -device VGA,bus=pci.0,addr=0x2 \ -chardev socket,id=serial_id_serial0,path=/tmp/222,server,nowait \ -device spapr-vty,reg=0x30000000,chardev=serial_id_serial0 \ -device nec-usb-xhci,id=usb1,bus=pci.0,addr=0x3 \ -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pci.0,addr=0x4 \ -drive id=drive_image1,if=none,snapshot=off,aio=threads,cache=none,format=qcow2,file=/home/kar/vt_test_images/rhel80-ppc64le-virtio-scsi.qcow2 \ -device scsi-hd,id=image1,drive=drive_image1 \ -device virtio-net-pci,mac=9a:31:32:33:34:35,id=idJ4yl44,vectors=4,bus=pci.0,addr=0x5 \ -m 4096,slots=4,maxmem=32G \ -object memory-backend-ram,size=1G,policy=default,id=mem-mem1 \ -device pc-dimm,node=1,id=dimm-mem1,memdev=mem-mem1 \ -object memory-backend-ram,size=1G,policy=default,id=mem-mem2 \ -device pc-dimm,node=0,id=dimm-mem2,memdev=mem-mem2 \ -object memory-backend-ram,size=1G,policy=default,id=mem-plug1 \ -device pc-dimm,memdev=mem-plug1,node=0,id=dimm-plug1 \ -object memory-backend-ram,size=1G,policy=default,id=mem-plug2 \ -device pc-dimm,memdev=mem-plug2,node=1,id=dimm-plug2 \ -smp 8,maxcpus=8,cores=4,threads=1,sockets=2 \ -numa node,nodeid=0 \ -numa node,nodeid=1 \ -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \ -vnc :4 \ -rtc base=utc,clock=host \ -boot order=cdn,once=c,menu=off,strict=off \ -enable-kvm \ -incoming tcp:0:5200 \ -monitor stdio 4. (qemu) q qemu-kvm: util/qemu-thread-posix.c:258: qemu_sem_timedwait: Assertion `sem->initialized' failed. g1.sh: line 27: 77581 Aborted (core dumped) /usr/libexec/qemu-kvm -name 'avocado-vt-vm1' -sandbox off -machine pseries -nodefaults -device VGA,bus=pci.0,addr=0x2 -chardev socket,id=serial_id_serial0,path=/tmp/111,server,nowait -device spapr-vty,reg=0x30000000,chardev=serial_id_serial0 -device nec-usb-xhci,id=usb1,bus=pci.0,addr=0x3 -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pci.0,addr=0x4 -drive id=drive_image1,if=none,snapshot=off,aio=threads,cache=none,format=qcow2,file=/home/kar/vt_test_images/rhel80-ppc64le-virtio-scsi.qcow2 -device scsi-hd,id=image1,drive=drive_image1 -device virtio-net-pci,mac=9a:31:32:33:34:35,id=idQh8pOj,vectors=4,bus=pci.0,addr=0x5 -m 4096,slots=4,maxmem=32G -object memory-backend-ram,size=1G,policy=default,id=mem-mem1 -device pc-dimm,node=1,id=dimm-mem1,memdev=mem-mem1 -object memory-backend-ram,size=1G,policy=default,id=mem-mem2 -device pc-dimm,node=0,id=dimm-mem2,memdev=mem-mem2 -smp 8,maxcpus=8,cores=4,threads=1,sockets=2 -numa node,nodeid=0 -numa node,nodeid=1 -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 -vnc :3 -rtc base=utc,clock=host -boot order=cdn,once=c,menu=off,strict=off -enable-kvm -monitor stdio Actual results: Quit destination guest directly and please check the attachment log. Expected results: No core dump. Additional info: QE tried this bug about 10 times bug only reproduce it once.
Created attachment 1512966 [details] entire log
Update steps,after step 3 migrate -d tcp:0:5200 from source guest info migrate ...
Min, seems you have lost the migration step between step3 and step4.
(In reply to Gu Nini from comment #3) > Min, seems you have lost the migration step between step3 and step4. Thanks,Nini, I'm aware of it after reporting it and already updated it to comment2,thanks for reminder.
Sorry for delay. Tried the bug on x86 platform and I didn't reproduce it (about 10 times),Thanks kernel-4.18.0-50.el8.x86_64 qemu-kvm-3.1.0-2.module+el8+2606+2c716ad7.x86_64
Tried 20 times on ppc64le with host kernel-4.18.0-57.el8.ppc64le qemu-kvm-3.1.0-3.module+el8+2614+d714d2bb.ppc64le -> not reproduced Could you reproduce it and provide the core or at least the backtrace?
I'm trying to reproduce the problem again,there's something need to be emphasized here.Setting THP as always is necessary for reproducing,Thanks.
(In reply to Min Deng from comment #14) > I'm trying to reproduce the problem again,there's something need to be > emphasized here.Setting THP as always is necessary for reproducing,Thanks. Min, do you reproduce the problem?
Laurent, Still trying for it and will give your reply as soon as possible.Thanks Min
After trying it in these days and ,it's hard for QE to reproduce it again.The reproducible ratio was quite lower than the reported initially. I'm going to close it temporarily since it wasn't reproduced on the latest build as well.[qemu-kvm-core-3.1.0-11.module+el8+2747+40c9b77e]. Feel free to re-open it if you need.Thanks.