Bug 1525324
| Summary: | 2 VMs both with 'share-rw=on' appending on '-device usb-storage' for the same source image can not be started at the same time | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | jiyan <jiyan> |
| Component: | qemu-kvm-rhev | Assignee: | Fam Zheng <famz> |
| Status: | CLOSED ERRATA | QA Contact: | Gu Nini <ngu> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 7.5 | CC: | chayang, cliao, dyuan, hhan, jiyan, juzhang, knoel, lmen, lmiksik, meili, michen, ngu, pkrempa, qzhang, virt-maint, xuma, xuzhang, yisun |
| Target Milestone: | rc | Keywords: | Regression |
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-rhev-2.10.0-19.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-04-11 00:52:14 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: | 1525303 | ||
There is a QEMU bug that doesn't handle the "share-rw=on" from the command line correctly. I'll send a patch to upstream. Failed to boot up 2 guests with 'share-rw=on' appeding on virtio scsi/block disks, so the bug is not must usb-storage related. # /usr/libexec/qemu-kvm -name 'avocado-vt-vm1' -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pci.0 -drive id=drive_image2,if=none,snapshot=off,aio=native,cache=none,format=qcow2,file=/home/win10-32-virtio-scsi.qcow2 -device scsi-hd,id=image1,drive=drive_image2,bootindex=1,share-rw=on -vnc :20 -monitor stdio -cpu 'SandyBridge',+kvm_pv_unhalt,hv_relaxed,hv_spinlocks=0x1fff,hv_vapic,hv_time qemu-kvm: -drive id=drive_image2,if=none,snapshot=off,aio=native,cache=none,format=qcow2,file=/home/win10-32-virtio-scsi.qcow2: Failed to get "write" lock Is another process using the image? # /usr/libexec/qemu-kvm -name 'avocado-vt-vm1' -drive id=drive_image1,if=none,snapshot=off,aio=native,cache=none,format=qcow2,file=/home/win10-32-virtio-scsi.qcow2 -device virtio-blk-pci,id=image1,drive=drive_image1,bootindex=0,bus=pci.0,share-rw=on -vnc :20 -monitor stdio -cpu 'SandyBridge',+kvm_pv_unhalt,hv_relaxed,hv_spinlocks=0x1fff,hv_vapic,hv_time qemu-kvm: -drive id=drive_image1,if=none,snapshot=off,aio=native,cache=none,format=qcow2,file=/home/win10-32-virtio-scsi.qcow2: Failed to get "write" lock Is another process using the image? Fix included in qemu-kvm-rhev-2.10.0-19.el7 Verify the bug on following sw versions: Host kernel: 3.10.0-843.el7.x86_64 Qemu-kvm-rhev: qemu-kvm-rhev-2.10.0-19.el7.x86_64 2 guests could boot up with the same raw disk image as usb storage disk with 'share-rw=on appended: -drive id=drive_image2,if=none,snapshot=off,aio=threads,cache=none,format=raw,file=/home/hd1.raw -device usb-storage,id=image2,drive=drive_image2,share-rw=on,bootindex=2,bus=usbtest.0 \ 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/RHSA-2018:1104 |
Description of problem: 2 VMs both with <shareable/> configured for same source image in usb bus can not start at the same time Version-Release number of selected component (if applicable): libvirt-3.9.0-6.el7.x86_64 kernel-3.10.0-820.el7.x86_64 qemu-kvm-rhev-2.10.0-12.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1. Prepare 2 shutdown VM with the following configuration # virsh domstate test1 shut off # virsh domstate test2 shut off # virsh dumpxml test1 --inactive|grep "<disk" -A6 <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/RHEL-7.5-x86_64-latest.img'/> <target dev='hda' bus='usb'/> <shareable/> <address type='usb' bus='0' port='3'/> </disk> # virsh dumpxml test2 --inactive|grep "<disk" -A6 <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/RHEL-7.5-x86_64-latest.img'/> <target dev='hda' bus='usb'/> <shareable/> <address type='usb' bus='0' port='3'/> </disk> 2. Try to start 2 VMs # virsh start test1 Domain test1 started # ps -ef |grep test1 |sed 's/-device/\n-device/g' qemu 4943 1 1 11:47 ? 00:00:01 /usr/libexec/qemu-kvm -name guest=test1 -drive file=/var/lib/libvirt/images/RHEL-7.5-x86_64-latest.img,format=raw,if=none,id=drive-usb-disk0,cache=none -device usb-storage,bus=usb.0,port=3,share-rw=on,drive=drive-usb-disk0,id=usb-disk0,bootindex=1,removable=off -netdev tap,fd=27,id=hostnet0 # virsh start test2 error: Failed to start domain test2 error: internal error: qemu unexpectedly closed the monitor: profiling:/builddir/build/BUILD/libvirt-3.9.0/src/util/.libs/libvirt_util_la-virbuffer.gcda:Cannot open profiling:/builddir/build/BUILD/libvirt-3.9.0/src/util/.libs/libvirt_util_la-virbitmap.gcda:Cannot open profiling:/builddir/build/BUILD/libvirt-3.9.0/src/util/.libs/libvirt_util_la-virauthconfig.gcda:Cannot open profiling:/builddir/build/BUILD/libvirt-3.9.0/src/util/.libs/libvirt_util_la-virauth.gcda:Cannot open profiling:/builddir/build/BUILD/libvirt-3.9.0/src/util/.libs/libvirt_util_la-viraudit.gcda:Cannot open profiling:/builddir/build/BUILD/libvirt-3.9.0/src/util/.libs/libvirt_util_la-virarch.gcda:Cannot open profiling:/builddir/build/BUILD/libvirt-3.9.0/src/util/.libs/libvirt_util_la-viralloc.gcda:Cannot open 2017-12-13T03:14:35.670317Z qemu-kvm: -device usb-storage,bus=usb.0,port=3,share-rw=on,drive=drive-usb-disk0,id=usb-disk0,bootindex=1,removable=off: Failed to get shared "write" lock Is another process using the image? Actual results: 2 VMs both with <shareable/> configured for same source image in usb bus can not start at the same time, and while 'share-rw=on' already shows in the error info Expected results: 2 VMs both with <shareable/> configured for same source image in usb bus can start at the same time Additional info: Under same condition with above, 2 VMs both with IDE bus or SCSI bus can work well.