Bug 1476181
| Summary: | qemu core dumped after hotplug one cpu core with a negative core id | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Xujun Ma <xuma> |
| Component: | qemu-kvm | Assignee: | Laurent Vivier <lvivier> |
| Status: | CLOSED ERRATA | QA Contact: | Xujun Ma <xuma> |
| Severity: | medium | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.4-Alt | CC: | bugproxy, hannsj_uhl, knoel, lvivier, mrezanin, qzhang, rbalakri, virt-maint |
| Target Milestone: | rc | ||
| Target Release: | 7.4-Alt | ||
| Hardware: | ppc64le | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-2.9.0-20.el7a | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-11-09 11:31:17 UTC | Type: | Bug |
| 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: | 1440030 | ||
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Description
Xujun Ma
2017-07-28 08:25:14 UTC
*** Bug 1475747 has been marked as a duplicate of this bug. *** I have proposed a fix upstream: http://lists.nongnu.org/archive/html/qemu-devel/2017-08/msg00281.html Fix included in qemu-kvm-2.9.0-20.el7a Reproduced the issue on old version: Version-Release number of selected component (if applicable): host:4.11.0-10.el7a.ppc64le guest:4.11.0-16.el7a.ppc64le qemu:qemu-kvm-2.9.0-18.el7a.ppc64le Steps to Reproduce: 1.Boot guest with command /usr/libexec/qemu-kvm \ -name vm \ -m 8192 \ -rtc base=utc,clock=host \ -smp 2,maxcpus=4,cores=4,threads=1,sockets=1 \ -chardev stdio,mux=on,id=serial_id_serial0,server,nowait \ -device spapr-vty,id=serial111,chardev=serial_id_serial0 \ -mon chardev=serial_id_serial0,mode=readline \ -nodefaults \ -device virtio-scsi-pci,bus=pci.0,addr=0x5 \ -device scsi-hd,id=scsi-hd0,drive=scsi-hd-dr0,bootindex=1\ -drive file=pegas.qcow2,if=none,id=scsi-hd-dr0,format=qcow2,cache=none \ -device virtio-net-pci,netdev=net0,id=nic0,mac=70:e2:84:14:e7:84 \ -netdev tap,id=net0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown,vhost=on 2.Hotplug cpu core (qemu) device_add host-spapr-cpu-core,core-id=-2,id=core 3.(qemu)q Actual results: (qemu) device_add host-spapr-cpu-core,core-id=-2,id=core1 Can't create CPU with id -2 in KVM Adjust the number of cpus to -2 or try to raise the number of threads per core (qemu) q guest.sh: line 18: 14761 Segmentation fault (core dumped) /usr/libexec/qemu-kvm -name vm -m 8192 -rtc base=utc,clock=host -smp 2,maxcpus=4,cores=4,threads=1,sockets=1 -chardev stdio,mux=on,id=serial_id_serial0,server,nowait -device spapr-vty,id=serial111,chardev=serial_id_serial0 -mon chardev=serial_id_serial0,mode=readline -nodefaults -device virtio-scsi-pci,bus=pci.0,addr=0x5 -device scsi-hd,id=scsi-hd0,drive=scsi-hd-dr0,bootindex=1 -drive file=pegas.qcow2,if=none,id=scsi-hd-dr0,format=qcow2,cache=none -device virtio-net-pci,netdev=net0,id=nic0,mac=70:e2:84:14:e7:84 -netdev tap,id=net0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown,vhost=on Verified the issue on the latest build: Version-Release number of selected component (if applicable): host:4.11.0-10.el7a.ppc64le guest:4.11.0-16.el7a.ppc64le qemu:qemu-kvm-2.9.0-20.el7a.ppc64le Steps to Verify: The same as above Actual results: (qemu) device_add host-spapr-cpu-core,core-id=-2,id=core Invalid core id -2 (qemu) q Negative core id is invalid and no core dumped when exit.So the bug has been fixed. 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, 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/RHEA-2017:3169 |