Bug 2155748
| Summary: | qemu crash on void blk_drain(BlockBackend *): Assertion qemu_in_main_thread() failed | |||
|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 9 | Reporter: | qing.wang <qinwang> | |
| Component: | qemu-kvm | Assignee: | Stefan Hajnoczi <stefanha> | |
| qemu-kvm sub component: | virtio-blk,scsi | QA Contact: | qing.wang <qinwang> | |
| Status: | CLOSED ERRATA | Docs Contact: | ||
| Severity: | high | |||
| Priority: | high | CC: | aliang, chayang, coli, hreitz, jinzhao, juzhang, kwolf, lijin, mrezanin, pvlasin, qinwang, qizhu, stefanha, vgoyal, virt-maint, xuwei, ymankad, zhenyzha | |
| Version: | 9.2 | Keywords: | CustomerScenariosInitiative, Triaged | |
| Target Milestone: | rc | |||
| Target Release: | --- | |||
| Hardware: | x86_64 | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | qemu-kvm-7.2.0-12.el9_2 | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | ||
| Clone Of: | ||||
| : | 2176926 (view as bug list) | Environment: | ||
| Last Closed: | 2023-05-09 07:20:55 UTC | Type: | --- | |
| Regression: | --- | Mount Type: | --- | |
| Documentation: | --- | CRM: | ||
| Verified Versions: | Category: | --- | ||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | ||
| Cloudforms Team: | --- | Target Upstream Version: | ||
| Embargoed: | ||||
| Bug Depends On: | ||||
| Bug Blocks: | 2090990, 2176926 | |||
Is this something new? Is this a regression? Can you try with older qemu versions and figure out when was this issue introduced? I think the assertion is too strict. I'll send a QEMU patch for Kevin and Emanuele to review. (In reply to Vivek Goyal from comment #3) > Is this something new? Is this a regression? > > Can you try with older qemu versions and figure out when was this issue > introduced? maybe it is not a regression issue, if we use an older version (7.1-0) it will hit Bug 2090139 - qemu crash with error scsi_req_unref(SCSIRequest *): Assertion `req->refcount > 0' failed or scsi_dma_complete(void *, int): Assertion `r->req.aiocb != NULL' failed New upstream patch: https://lore.kernel.org/qemu-devel/20230119214326.1339323-1-stefanha@redhat.com/T/#u Backport posted: https://gitlab.com/redhat/rhel/src/qemu-kvm/qemu-kvm/-/merge_requests/261 Exception requested because this bug crashes QEMU, which may cause customers to lose data. I have set needinfo from Qing Wang just to make sure everyone is aware that this BZ is being merged for RHEL 9.2 qemu-kvm and can be verified soon. *** Bug 2090139 has been marked as a duplicate of this bug. *** QE bot(pre verify): Set 'Verified:Tested,SanityOnly' as gating/tier1 test pass. Passed test on Red Hat Enterprise Linux release 9.2 Beta (Plow) 5.14.0-283.el9.x86_64 qemu-kvm-7.2.0-12.el9_2.x86_64 seabios-bin-1.16.1-1.el9.noarch edk2-ovmf-20221207gitfff6d81270b5-7.el9.noarch virtio-win-prewhql-0.1-234.iso python ConfigTest.py --testcase=multi_disk_wild_hotplug --iothread_scheme=roundrobin --nr_iothreads=2 --platform=x86_64 --guestname=RHEL.9.1.0 --driveformat=virtio_scsi --nicmodel=virtio_net --imageformat=qcow2 --machines=q35 --customsparams="vm_mem_limit = 12G\nimage_aio=threads" --firmware=default_bios --netdst=virbr0 --nrepeat=10 passed the test in comment #41 Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: qemu-kvm security, bug fix, and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2023:2162 |
Description of problem: The qemu hit crash issue when repeatly hotplug/unplug mutli disks. qemu-kvm: ../block/block-backend.c:1780: void blk_drain(BlockBackend *): Assertion `qemu_in_main_thread()' failed. BT: #0 0x00007f4b6a0a154c __pthread_kill_implementation (libc.so.6> #1 0x00007f4b6a054d46 raise (libc.so.6 + 0x54d46) #2 0x00007f4b6a0287f3 abort (libc.so.6 + 0x287f3) #3 0x00007f4b6a02871b __assert_fail_base.cold (libc.so.6 + 0x2> #4 0x00007f4b6a04dce6 __assert_fail (libc.so.6 + 0x4dce6) #5 0x000055c811253ac0 blk_drain (qemu-kvm + 0x808ac0) #6 0x000055c810ecb951 scsi_device_purge_requests (qemu-kvm + 0> #7 0x000055c810ed6ab8 scsi_disk_reset (qemu-kvm + 0x48bab8) #8 0x000055c8111dc908 resettable_phase_hold (qemu-kvm + 0x7919> #9 0x000055c8111db7f0 device_cold_reset (qemu-kvm + 0x7907f0) #10 0x000055c8110bb1a6 virtio_scsi_handle_ctrl (qemu-kvm + 0x67> #11 0x000055c8110d458f virtio_queue_host_notifier_read (qemu-kv> #12 0x000055c811404a73 aio_dispatch_handler (qemu-kvm + 0x9b9a7> #13 0x000055c811405743 aio_poll (qemu-kvm + 0x9ba743) #14 0x000055c81121d532 iothread_run (qemu-kvm + 0x7d2532) #15 0x000055c81140926a qemu_thread_start (qemu-kvm + 0x9be26a) #16 0x00007f4b6a09f802 start_thread (libc.so.6 + 0x9f802) #17 0x00007f4b6a03f450 __clone3 (libc.so.6 + 0x3f450) Version-Release number of selected component (if applicable): Red Hat Enterprise Linux release 9.2 Beta (Plow) 5.14.0-212.el9.x86_64 qemu-kvm-7.2.0-1.el9.x86_64 seabios-bin-1.16.1-1.el9.noarch edk2-ovmf-20220826gitba0e0e4c6a-2.el9.noarch libvirt-8.10.0-2.el9.x86_64 virtio-win-prewhql-0.1-231.iso How reproducible: 30% Steps to Reproduce: 1. Boot vm with multi disks. /usr/libexec/qemu-kvm \ -name 'avocado-vt-vm1' \ -sandbox on \ -machine q35,memory-backend=mem-machine_mem \ -device pcie-root-port,id=pcie-root-port-0,multifunction=on,bus=pcie.0,addr=0x1,chassis=1 \ -device pcie-pci-bridge,id=pcie-pci-bridge-0,addr=0x0,bus=pcie-root-port-0 \ -nodefaults \ -device VGA,bus=pcie.0,addr=0x2 \ -m 12288 \ -object '{"qom-type": "memory-backend-ram", "size": 12884901888, "id": "mem-machine_mem"}' \ -smp 10,maxcpus=10,cores=5,threads=1,dies=1,sockets=2 \ -cpu 'Cascadelake-Server-noTSX',+kvm_pv_unhalt \ \ -device pcie-root-port,id=pcie-root-port-1,port=0x1,addr=0x1.0x1,bus=pcie.0,chassis=2 \ -device qemu-xhci,id=usb1,bus=pcie-root-port-1,addr=0x0 \ -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \ -object '{"qom-type": "iothread", "id": "iothread0"}' \ -object '{"qom-type": "iothread", "id": "iothread1"}' \ -device pcie-root-port,id=pcie-root-port-2,port=0x2,addr=0x1.0x2,bus=pcie.0,chassis=3 \ -device '{"id": "virtio_scsi_pci0", "driver": "virtio-scsi-pci", "bus": "pcie-root-port-2", "addr": "0x0", "iothread": "iothread0"}' \ -blockdev '{"node-name": "file_image1", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/rhel910-64-virtio-scsi.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_image1", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_image1"}' \ -device '{"driver": "scsi-hd", "id": "image1", "drive": "drive_image1", "write-cache": "on"}' \ -device pcie-root-port,id=pcie-root-port-3,port=0x3,addr=0x1.0x3,bus=pcie.0,chassis=4 \ -device '{"id": "virtio_scsi_pci1", "driver": "virtio-scsi-pci", "bus": "pcie-root-port-3", "addr": "0x0", "iothread": "iothread1"}' \ -blockdev '{"node-name": "file_stg0", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg0.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg0", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg0"}' \ -device '{"driver": "scsi-hd", "id": "stg0", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg0", "write-cache": "on", "lun": 0}' \ -blockdev '{"node-name": "file_stg1", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg1.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg1", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg1"}' \ -device '{"driver": "scsi-hd", "id": "stg1", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg1", "write-cache": "on", "lun": 1}' \ -blockdev '{"node-name": "file_stg2", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg2.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg2", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg2"}' \ -device '{"driver": "scsi-hd", "id": "stg2", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg2", "write-cache": "on", "lun": 2}' \ -blockdev '{"node-name": "file_stg3", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg3.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg3", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg3"}' \ -device '{"driver": "scsi-hd", "id": "stg3", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg3", "write-cache": "on", "lun": 3}' \ -blockdev '{"node-name": "file_stg4", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg4.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg4", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg4"}' \ -device '{"driver": "scsi-hd", "id": "stg4", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg4", "write-cache": "on", "lun": 4}' \ -blockdev '{"node-name": "file_stg5", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg5.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg5", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg5"}' \ -device '{"driver": "scsi-hd", "id": "stg5", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg5", "write-cache": "on", "lun": 5}' \ -blockdev '{"node-name": "file_stg6", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg6.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg6", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg6"}' \ -device '{"driver": "scsi-hd", "id": "stg6", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg6", "write-cache": "on", "lun": 6}' \ -blockdev '{"node-name": "file_stg7", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg7.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg7", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg7"}' \ -device '{"driver": "scsi-hd", "id": "stg7", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg7", "write-cache": "on", "lun": 7}' \ -blockdev '{"node-name": "file_stg8", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg8.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg8", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg8"}' \ -device '{"driver": "scsi-hd", "id": "stg8", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg8", "write-cache": "on", "lun": 8}' \ -blockdev '{"node-name": "file_stg9", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg9.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg9", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg9"}' \ -device '{"driver": "scsi-hd", "id": "stg9", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg9", "write-cache": "on", "lun": 9}' \ -blockdev '{"node-name": "file_stg10", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg10.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg10", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg10"}' \ -device '{"driver": "scsi-hd", "id": "stg10", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg10", "write-cache": "on", "lun": 10}' \ -blockdev '{"node-name": "file_stg11", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg11.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg11", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg11"}' \ -device '{"driver": "scsi-hd", "id": "stg11", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg11", "write-cache": "on", "lun": 11}' \ -blockdev '{"node-name": "file_stg12", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg12.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg12", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg12"}' \ -device '{"driver": "scsi-hd", "id": "stg12", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg12", "write-cache": "on", "lun": 12}' \ -blockdev '{"node-name": "file_stg13", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg13.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg13", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg13"}' \ -device '{"driver": "scsi-hd", "id": "stg13", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg13", "write-cache": "on", "lun": 13}' \ -blockdev '{"node-name": "file_stg14", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg14.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg14", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg14"}' \ -device '{"driver": "scsi-hd", "id": "stg14", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg14", "write-cache": "on", "lun": 14}' \ -blockdev '{"node-name": "file_stg15", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg15.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg15", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg15"}' \ -device '{"driver": "scsi-hd", "id": "stg15", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg15", "write-cache": "on", "lun": 15}' \ -blockdev '{"node-name": "file_stg16", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg16.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg16", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg16"}' \ -device '{"driver": "scsi-hd", "id": "stg16", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg16", "write-cache": "on", "lun": 16}' \ -blockdev '{"node-name": "file_stg17", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg17.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg17", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg17"}' \ -device '{"driver": "scsi-hd", "id": "stg17", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg17", "write-cache": "on", "lun": 17}' \ -blockdev '{"node-name": "file_stg18", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg18.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg18", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg18"}' \ -device '{"driver": "scsi-hd", "id": "stg18", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg18", "write-cache": "on", "lun": 18}' \ -blockdev '{"node-name": "file_stg19", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg19.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg19", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg19"}' \ -device '{"driver": "scsi-hd", "id": "stg19", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg19", "write-cache": "on", "lun": 19}' \ -blockdev '{"node-name": "file_stg20", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg20.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg20", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg20"}' \ -device '{"driver": "scsi-hd", "id": "stg20", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg20", "write-cache": "on", "lun": 20}' \ -blockdev '{"node-name": "file_stg21", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg21.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg21", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg21"}' \ -device '{"driver": "scsi-hd", "id": "stg21", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg21", "write-cache": "on", "lun": 21}' \ -blockdev '{"node-name": "file_stg22", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg22.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg22", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg22"}' \ -device '{"driver": "scsi-hd", "id": "stg22", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg22", "write-cache": "on", "lun": 22}' \ -blockdev '{"node-name": "file_stg23", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg23.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg23", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg23"}' \ -device '{"driver": "scsi-hd", "id": "stg23", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg23", "write-cache": "on", "lun": 23}' \ -blockdev '{"node-name": "file_stg24", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg24.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg24", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg24"}' \ -device '{"driver": "scsi-hd", "id": "stg24", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg24", "write-cache": "on", "lun": 24}' \ -blockdev '{"node-name": "file_stg25", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg25.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg25", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg25"}' \ -device '{"driver": "scsi-hd", "id": "stg25", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg25", "write-cache": "on", "lun": 25}' \ -blockdev '{"node-name": "file_stg26", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg26.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg26", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg26"}' \ -device '{"driver": "scsi-hd", "id": "stg26", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg26", "write-cache": "on", "lun": 26}' \ -blockdev '{"node-name": "file_stg27", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg27.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg27", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg27"}' \ -device '{"driver": "scsi-hd", "id": "stg27", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg27", "write-cache": "on", "lun": 27}' \ -blockdev '{"node-name": "file_stg28", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg28.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg28", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg28"}' \ -device '{"driver": "scsi-hd", "id": "stg28", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg28", "write-cache": "on", "lun": 28}' \ -blockdev '{"node-name": "file_stg29", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg29.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg29", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg29"}' \ -device '{"driver": "scsi-hd", "id": "stg29", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg29", "write-cache": "on", "lun": 29}' \ -blockdev '{"node-name": "file_stg30", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg30.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg30", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg30"}' \ -device '{"driver": "scsi-hd", "id": "stg30", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg30", "write-cache": "on", "lun": 30}' \ -blockdev '{"node-name": "file_stg31", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg31.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg31", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg31"}' \ -device '{"driver": "scsi-hd", "id": "stg31", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg31", "write-cache": "on", "lun": 31}' \ -blockdev '{"node-name": "file_stg32", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg32.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg32", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg32"}' \ -device '{"driver": "scsi-hd", "id": "stg32", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg32", "write-cache": "on", "lun": 32}' \ -blockdev '{"node-name": "file_stg33", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg33.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg33", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg33"}' \ -device '{"driver": "scsi-hd", "id": "stg33", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg33", "write-cache": "on", "lun": 33}' \ -blockdev '{"node-name": "file_stg34", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg34.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg34", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg34"}' \ -device '{"driver": "scsi-hd", "id": "stg34", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg34", "write-cache": "on", "lun": 34}' \ -blockdev '{"node-name": "file_stg35", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg35.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg35", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg35"}' \ -device '{"driver": "scsi-hd", "id": "stg35", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg35", "write-cache": "on", "lun": 35}' \ -blockdev '{"node-name": "file_stg36", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg36.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg36", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg36"}' \ -device '{"driver": "scsi-hd", "id": "stg36", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg36", "write-cache": "on", "lun": 36}' \ -blockdev '{"node-name": "file_stg37", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg37.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg37", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg37"}' \ -device '{"driver": "scsi-hd", "id": "stg37", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg37", "write-cache": "on", "lun": 37}' \ -blockdev '{"node-name": "file_stg38", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg38.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg38", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg38"}' \ -device '{"driver": "scsi-hd", "id": "stg38", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg38", "write-cache": "on", "lun": 38}' \ -blockdev '{"node-name": "file_stg39", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg39.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg39", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg39"}' \ -device '{"driver": "scsi-hd", "id": "stg39", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg39", "write-cache": "on", "lun": 39}' \ -blockdev '{"node-name": "file_stg40", "driver": "file", "auto-read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/images/mstg40.qcow2", "cache": {"direct": true, "no-flush": false}}' \ -blockdev '{"node-name": "drive_stg40", "driver": "qcow2", "read-only": false, "cache": {"direct": true, "no-flush": false}, "file": "file_stg40"}' \ -device '{"driver": "scsi-hd", "id": "stg40", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg40", "write-cache": "on", "lun": 40}' \ -device pcie-root-port,id=pcie-root-port-4,port=0x4,addr=0x1.0x4,bus=pcie.0,chassis=5 \ -device virtio-net-pci,mac=9a:c1:77:39:18:55,id=idNY9b9u,netdev=idpVDVCD,bus=pcie-root-port-4,addr=0x0 \ -netdev tap,id=idpVDVCD,vhost=on \ -vnc :5 \ -monitor stdio \ -qmp tcp:0:5955,server,nowait \ -rtc base=utc,clock=host,driftfix=slew \ -boot menu=off,order=cdn,once=c,strict=off \ -enable-kvm \ -device pcie-root-port,id=pcie_extra_root_port_0,multifunction=on,bus=pcie.0,addr=0x3,chassis=6 2. run guest_sg_luns.sh in guest cat ./qemu/deps/guest_sg_luns.sh trap 'kill $(jobs -p)' EXIT SIGINT for i in `seq 0 32` ; do while true ; do sg_luns /dev/sdb > /dev/null 2>&1 done & done echo "wait" wait 3.delete all data disks {"execute": "device_del", "arguments": {"id": "stg1"}} .... {"execute": "device_del", "arguments": {"id": "stg40"}} 4.sleep 3 seconds 5.replug all data disks {"execute": "device_add", "arguments": {"driver": "scsi-hd", "id": "stg1", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg1", "write-cache": "on", "lun": 1}, "id": "lDc9ERuj"} .... {"execute": "device_add", "arguments": {"driver": "scsi-hd", "id": "stg40", "bus": "virtio_scsi_pci1.0", "drive": "drive_stg1", "write-cache": "on", "lun": 40}, "id": "lDc9ERuj"} 6.sleep 3 seconds 7.repeat step 3-6 500 times Actual results: qemu crash Expected results: qemu should keep running Additional info: