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Hi, Ademar
Test it on qemu-kvm-rhev-2.12.0-18.el7_6.2.x86_64, don't hit this issue any more.
So please add some comments and set bug's status to "ON_QA", then i can set it to "Verified".
Thanks,
aliang
This was likely fixed in late RHEL-7.6, with downstream patch series like these:
* [RHV-7.6 qemu-kvm-rhev PATCH 00/42] block: Drain and iothread fixes
* [RHV-7.6 qemu-kvm-rhev PATCH 0/3] block: Fix another drain hang
Created attachment 1471000 [details] iothreads.log Description of problem: Qemu hang when waiting to quit vm with iothreads > 4 Version-Release number of selected component (if applicable): kernel version:3.10.0-918.el7.x86_64 qemu-kvm-rhev version:qemu-kvm-rhev-2.12.0-8.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1.Start guest with 5 iothreads, cmds as bellow: /usr/libexec/qemu-kvm \ -name 'avocado-vt-vm1' \ -sandbox off \ -machine pc \ -nodefaults \ -device VGA,bus=pci.0,addr=0x2 \ -chardev socket,id=qmp_id_qmpmonitor1,path=/var/tmp/monitor-qmpmonitor1-20180720-030354-ueFtK0UG,server,nowait \ -mon chardev=qmp_id_qmpmonitor1,mode=control \ -chardev socket,id=qmp_id_catch_monitor,path=/var/tmp/monitor-catch_monitor-20180720-030354-ueFtK0UG,server,nowait \ -mon chardev=qmp_id_catch_monitor,mode=control \ -device pvpanic,ioport=0x505,id=idbB13JZ \ -chardev socket,id=serial_id_serial0,path=/var/tmp/serial-serial0-20180720-030354-ueFtK0UG,server,nowait \ -device isa-serial,chardev=serial_id_serial0 \ -chardev socket,id=seabioslog_id_20180720-030354-ueFtK0UG,path=/var/tmp/seabios-20180720-030354-ueFtK0UG,server,nowait \ -device isa-debugcon,chardev=seabioslog_id_20180720-030354-ueFtK0UG,iobase=0x402 \ -device nec-usb-xhci,id=usb1,bus=pci.0,addr=0x3 \ -object iothread,id=iothread0 \ -object iothread,id=iothread1 \ -object iothread,id=iothread2 \ -object iothread,id=iothread3 \ -object iothread,id=iothread4 \ -drive id=drive_image1,if=none,snapshot=off,aio=threads,cache=none,format=raw,file=/home/kvm_autotest_root/images/rhel76-64-virtio-scsi.raw \ -device virtio-blk-pci,id=image1,drive=drive_image1 \ -device virtio-net-pci,mac=9a:06:07:08:09:0a,id=idOc8BkD,vectors=4,netdev=idb7ErEu,bus=pci.0,addr=0x5 \ -netdev tap,id=idb7ErEu,vhost=on,vhostfd=19,fd=10 \ -m 14336 \ -smp 12,maxcpus=12,cores=6,threads=1,sockets=2 \ -cpu 'Opteron_G5',+kvm_pv_unhalt \ -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \ -vnc :0 \ -rtc base=utc,clock=host,driftfix=slew \ -boot menu=off,strict=off,order=cdn,once=c \ -enable-kvm \ -monitor stdio \ 2. Wait for some minutes, shutdown guest ---by quit or by system_powerdown in hmp 3. If quit fail, kill the qemu process, restart guest with 4 iothreads: ..... -object iothread,id=iothread0 \ -object iothread,id=iothread1 \ -object iothread,id=iothread2 \ -object iothread,id=iothread3 \ ... 4. repeat step 2. Actual results: In step2, qemu hang when waiting to quit vm, info as bellow: (host#)strace -T -tt -e trace=all -p 27845 -o iothreads.log .... 02:56:50.810145 write(19, "\1\0\0\0\0\0\0\0", 8) = -1 EBADF (Bad file descriptor) <0.000018> 02:56:50.810198 futex(0x7fc83c50a9d0, FUTEX_WAIT, 27851, NULL ... details, see attachment ---iothreads.log But in step4, when start guest with 4 iothreads, then quit, qemu can terminated successfully. Expected results: Guest can shutdown successfully with iothreads > 4.