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According to comment0, I re-tested this bug with the latest RHEL7.4.z.
qemu-kvm-rhev-2.9.0-16.el7_4.14.x86_64
3.10.0-693.17.1.el7.x86_64
I cann't reproduce this bug. I did twice. Guest works well.
Description of problem: tried to run the autotest case virt.qemu.smp_2.8192m.repeat1.run_test.Host_RHEL.7.1.qcow2.virtio_blk.up.virtio_net.RHEL.7.1.x86_64.io-github-autotest-qemu.suspend_under_netperf.guest_s3, met qemu core dumped when do stop/cont VM after suspend/resume under netperf, both qemu-kvm and qemu-kvm-rhev can hit it. BTW, if tried the s4 with the same testing(virt.qemu.smp_2.8192m.repeat1.run_test.Host_RHEL.7.1.qcow2.virtio_blk.up.virtio_net.RHEL.7.1.x86_64.io-github-autotest-qemu.suspend_under_netperf.guest_s4) which did not hit this core dumped. Version-Release number of selected component (if applicable): host info: # uname -r && rpm -q qemu-kvm-rhev 3.10.0-217.el7.x86_64 qemu-kvm-rhev-2.1.2-17.el7.x86_64 guest info: 3.10.0-217.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1, Boot guest with command: /usr/bin/qemu-kvm \ -S \ -name 'virt-tests-vm1' \ -sandbox on \ -M pc \ -nodefaults \ -vga std \ -chardev socket,id=hmp_id_hmp1,path=/tmp/monitor-hmp1-20150105-112252-ymEGEBEh,server,nowait \ -mon chardev=hmp_id_hmp1,mode=readline \ -chardev socket,id=serial_id_serial0,path=/tmp/serial-serial0-20150105-112252-ymEGEBEh,server,nowait \ -device isa-serial,chardev=serial_id_serial0 \ -chardev socket,id=seabioslog_id_20150105-112252-ymEGEBEh,path=/tmp/seabios-20150105-112252-ymEGEBEh,server,nowait \ -device isa-debugcon,chardev=seabioslog_id_20150105-112252-ymEGEBEh,iobase=0x402 \ -device ich9-usb-uhci1,id=usb1,bus=pci.0,addr=03 \ -drive id=drive_image1,if=none,file=/usr/code/autotest/client/tests/virt/shared/data/images/rhel71-64.qcow2 \ -device virtio-blk-pci,id=image1,drive=drive_image1,bootindex=0,bus=pci.0,addr=04 \ -device virtio-net-pci,mac=9a:8b:8c:8d:8e:8f,id=id16Gr6X,vectors=4,netdev=idrmF6gb,bus=pci.0,addr=05 \ -netdev tap,id=idrmF6gb,vhost=on,vhostfd=23,fd=22 \ -m 1024 \ -smp 2,maxcpus=2,cores=1,threads=1,sockets=2 \ -cpu 'Nehalem' \ -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \ -vnc :0 \ -rtc base=utc,clock=host,driftfix=none \ -boot order=cdn,once=c,menu=off,strict=off \ -global PIIX4_PM.disable_s3=0 \ -enable-kvm 2, Sending monitor command 'cont'. 3, Stop iptables in guest and host. 4, Start netperf server in host. 5, Start 6 sessions netperf background with cmd: ' /var/tmp/netperf-2.6.0/src/netperf -H $host_ip -- -b 10 -D -t TCP_STREAM -l 60 ' 6, Start suspend [echo mem > /sys/power/state] 7, Sleep a while before resuming guest 8, Sending monitor command 'system_wakeup' 9, Verify guest system log by command 'dmesg |grep -E "ACPI: Waking up from system sleep state S3"\|"ACPI: PCI interrupt for device .* disabled"' 10, Sending monitor command 'stop' 11, Check image info by qemu-img. 12, Sending monitor command 'cont'. Actual results: after step 12, qemu core dumped. [qemu output] qemu-kvm: /builddir/build/BUILD/qemu-2.1.2/hw/i386/kvm/clock.c:69: kvmclock_current_nsec: Assertion `time.tsc_timestamp <= migration_tsc' failed. [qemu output] /tmp/aexpect/jWFBxUUd/aexpect-OFsvMo.sh: line 1: 2118 Aborted (core dumped) /usr/bin/qemu-kvm -S -name 'virt-tests-vm1' -sandbox on -M pc -nodefaults -vga std -chardev socket,id=hmp_id_hmp1,path=/tmp/monitor-hmp1-20150105-112252-ymEGEBEh,server,nowait -mon chardev=hmp_id_hmp1,mode=readline -chardev socket,id=serial_id_serial0,path=/tmp/serial-serial0-20150105-112252-ymEGEBEh,server,nowait -device isa-serial,chardev=serial_id_serial0 -chardev socket,id=seabioslog_id_20150105-112252-ymEGEBEh,path=/tmp/seabios-20150105-112252-ymEGEBEh,server,nowait -device isa-debugcon,chardev=seabioslog_id_20150105-112252-ymEGEBEh,iobase=0x402 -device ich9-usb-uhci1,id=usb1,bus=pci.0,addr=03 -drive id=drive_image1,if=none,file=/usr/code/autotest/client/tests/virt/shared/data/images/rhel70-64.qcow2 -device virtio-blk-pci,id=image1,drive=drive_image1,bootindex=0,bus=pci.0,addr=04 -device virtio-net-pci,mac=9a:8b:8c:8d:8e:8f,id=id16Gr6X,vectors=4,netdev=idrmF6gb,bus=pci.0,addr=05 -netdev tap,id=idrmF6gb,vhost=on,vhostfd=23,fd=22 -m 1024 -smp 2,maxcpus=2,cores=1,threads=1,sockets=2 -cpu 'Nehalem' -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 -vnc :0 -rtc base=utc,clock=host,driftfix=none -boot order=cdn,once=c,menu=off,strict=off -global PIIX4_PM.disable_s3=0 -enable-kvm [qemu output] (Process terminated with status 134) Expected results: it should no any core dumped at all. Additional info: host cpu info, # cat /proc/cpuinfo ... processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz stepping : 5 microcode : 0x19 cpu MHz : 2661.000 cache size : 8192 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 apicid : 6 initial apicid : 6 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida dtherm tpr_shadow vnmi flexpriority ept vpid bogomips : 5333.52 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: