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This bug has been copied from bug #1299876 and has been proposed to be backported to 7.3 z-stream (EUS).
Fix included in qemu-kvm-rhev-2.6.0-28.el7_3.1
Has verified it, it still has some problem, bellow is the detail: Version-Release number: kernel version:3.10.0-514.6.1.el7.x86_64 qemu-kvm-rhev version:qemu-kvm-rhev-2.6.0-28.el7_3.2.x86_64 Test Step: 1.Create a 25G qcow2 image and install windows2012r2 on it. 2.Full write the guest image disk until no space left on device. 3.Start guest by qemu cmd: /usr/libexec/qemu-kvm \ -name 'avocado-vt-vm1' \ -sandbox off \ -machine pc \ -nodefaults \ -vga std \ -chardev socket,id=qmp_id_qmpmonitor1,path=/var/tmp/monitor-qmpmonitor1-20161219-042734-6fVMWCMz,server,nowait \ -mon chardev=qmp_id_qmpmonitor1,mode=control \ -chardev socket,id=qmp_id_catch_monitor,path=/var/tmp/monitor-catch_monitor-20161219-042734-6fVMWCMz,server,nowait \ -mon chardev=qmp_id_catch_monitor,mode=control \ -drive id=drive_image1,if=none,snapshot=off,aio=native,cache=none,format=qcow2,file=/usr/share/avocado/data/avocado-vt/images/win2012.qcow2 \ -device virtio-blk-pci,id=image1,drive=drive_image1,bootindex=0,bus=pci.0,addr=03 \ -device virtio-net-pci,mac=9a:f2:f3:f4:f5:f6,id=id30uvBS,vectors=4,netdev=idADyVP5,bus=pci.0,addr=04 \ -netdev tap,id=idADyVP5,vhost=on \ -m 2048 \ -smp 16,maxcpus=16,cores=8,threads=1,sockets=2 \ -cpu 'Opteron_G3',+kvm_pv_unhalt,hv_spinlocks=0x1fff,hv_vapic,hv_time \ -vnc :0 \ -rtc base=localtime,clock=host,driftfix=slew \ -boot order=cdn,once=d,menu=off,strict=off \ -enable-kvm \ -spice port=3000,ipv4,disable-ticketing \ -monitor stdio \ 4.Start some applications on guest utils it hangs. 5.Check vm status: (qemu)info status -------> VM status:paused(io-error) 6.Reset vm (qemu)system_reset ------->VM doesn't reboot immediately. 7.Check vm status (qemu)info status -------->VM status:paused(prelaunch) 8.Cont vm (qemu)cont -------->VM restart but hang when loading os 9.Check vm status (qemu)info status -------->VM status:paused(io-error) Actual Result: When we do "system_reset", guest starts fail as it can't recovery from io-error. Expect Result: VM can recovery from "io-error" after system_reset and start successfully. Note: My CPU is "Opteron_G3" and no segment fault displayed in qemu during the test.
Retest it by ide-drive, it also has problem: Version-Release number: kernel version:3.10.0-514.6.1.el7.x86_64 qemu-kvm-rhev version:qemu-kvm-rhev-2.6.0-28.el7_3.2.x86_64 Test Step: 1.Create a 25G qcow2 image and install windows2012r2 on it. 2.Full write the guest image disk until no space left on device. 3.Start guest by qemu cmd: MALLOC_PERTURB_=1 /usr/libexec/qemu-kvm \ -name 'avocado-vt-vm1' \ -sandbox off \ -machine pc \ -nodefaults \ -vga std \ -chardev socket,id=qmp_id_qmpmonitor1,path=/var/tmp/monitor-qmpmonitor1-20161227-001116-PD2k1uXB,server,nowait \ -mon chardev=qmp_id_qmpmonitor1,mode=control \ -chardev socket,id=qmp_id_catch_monitor,path=/var/tmp/monitor-catch_monitor-20161227-001116-PD2k1uXB,server,nowait \ -mon chardev=qmp_id_catch_monitor,mode=control \ -device pvpanic,ioport=0x505,id=id95e1vw \ -chardev socket,id=serial_id_serial0,path=/var/tmp/serial-serial0-20161227-001116-PD2k1uXB,server,nowait \ -device isa-serial,chardev=serial_id_serial0 \ -chardev socket,id=seabioslog_id_20161227-001116-PD2k1uXB,path=/var/tmp/seabios-20161227-001116-PD2k1uXB,server,nowait \ -device isa-debugcon,chardev=seabioslog_id_20161227-001116-PD2k1uXB,iobase=0x402 \ -device ich9-usb-ehci1,id=usb1,addr=1d.7,multifunction=on,bus=pci.0 \ -device ich9-usb-uhci1,id=usb1.0,multifunction=on,masterbus=usb1.0,addr=1d.0,firstport=0,bus=pci.0 \ -device ich9-usb-uhci2,id=usb1.1,multifunction=on,masterbus=usb1.0,addr=1d.2,firstport=2,bus=pci.0 \ -device ich9-usb-uhci3,id=usb1.2,multifunction=on,masterbus=usb1.0,addr=1d.4,firstport=4,bus=pci.0 \ -drive id=drive_image1,if=none,snapshot=off,aio=native,cache=none,format=qcow2,file=/usr/share/avocado/data/avocado-vt/images/win2012-64r2-virtio.qcow2 \ -device ide-hd,id=image1,drive=drive_image1,bus=ide.0,unit=0 \ -device virtio-net-pci,mac=9a:d7:d8:d9:da:db,id=idoYMY7R,vectors=4,netdev=iddvjhTd,bus=pci.0,addr=03 \ -netdev tap,id=iddvjhTd,vhost=on \ -m 4096 \ -smp 8,maxcpus=8,cores=4,threads=1,sockets=2 \ -cpu 'Westmere',+kvm_pv_unhalt,hv_spinlocks=0x1fff,hv_vapic,hv_time \ -drive id=drive_cd1,if=none,snapshot=off,aio=native,cache=none,media=cdrom,file=/usr/share/avocado/data/avocado-vt/isos/ISO/Win2012R2/en_windows_server_2012_r2_with_update_x64_dvd_6052708.iso \ -device ide-cd,id=cd1,drive=drive_cd1,bus=ide.0,unit=1 \ -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pci.0,addr=04 \ -drive id=drive_winutils,if=none,snapshot=off,aio=native,cache=none,media=cdrom,file=/usr/share/avocado/data/avocado-vt/isos/windows/winutils.iso \ -device scsi-cd,id=winutils,drive=drive_winutils \ -vnc :0 \ -rtc base=localtime,clock=host,driftfix=slew \ -boot order=cdn,menu=off,strict=off \ -enable-kvm \ -monitor stdio \ -spice port=3000,ipv4,disable-ticketing \ 4.Start some applications on guest utils it hangs. 5.Check vm status: (qemu)info status -------> VM status:paused(io-error) 6.Reset vm (qemu)system_reset ------->VM doesn't reboot immediately. 7.Check vm status (qemu)info status -------->VM status:paused(prelaunch) 8.Cont vm (qemu)cont -------->VM restart but hang when loading os 9.Check vm status (qemu)info status -------->VM status:paused(io-error) Actual Result: When we do "system_reset", guest starts fail as it can't recovery from io-error. Expect Result: VM can recovery from "io-error" after system_reset and start successfully.
According to fam's suggestion in https://bugzilla.redhat.com/show_bug.cgi?id=1393041 comment8, retest the bug, vm can reset successfully after release the disk space, detail as bellow: Test Steps: 1.Create a 25G qcow2 image and install windows2012r2 on it. 2.Full write the guest image disk until no space left on device. 3.Start guest by qemu cmd:(same as comment 7) 4.Start some applications on guest utils it hangs. 5.Check vm status: (qemu)info status ------->VM status:paused(io-error) 6.Reset vm (qemu)system_reset ------->VM doesn't reboot immediately. 7.Check vm status (qemu)info status -------->VM status:paused(prelaunch) 8.Cont vm (qemu)cont -------->VM restart but hang when loading os 9.Check vm status (qemu)info status -------->VM status:paused(io-error) 10.Release some disk space, then repeat step6~9. Test Result: After step10, vm can boot up and work normally with status "running". After release disk space + vm reset, the io-error can be ended and vm can work normally, so change the bug status to "Verified".
OK, removing needinfo for now. If there are still problems, please let me know.