Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Hi Yuri
I reproduced this bug on RHEL8.2 slow train.
Test Version:
qemu-kvm-2.12.0-99.module+el8.2.0+5827+8c39933c.x86_64
kernel-4.18.0-193.el8.x86_64
How reproducible:
100%
==steps
1.queues number smaller than CPUs number, qemu without output.
-smp 8 \
-device virtio-net-pci,mac=9a:89:b9:bc:88:b2,id=idyhQr7l,netdev=idNVyWKH,mq=on,vectors=10,bus=pcie-root-port-3,addr=0x0 \
-netdev tap,id=idNVyWKH,vhost=on,queues=4 \
2.queues number equal to CPUs number, qemu output error info.
-smp 8 \
-device virtio-net-pci,mac=9a:89:b9:bc:88:b2,id=idyhQr7l,netdev=idNVyWKH,mq=on,vectors=18,bus=pcie-root-port-3,addr=0x0 \
-netdev tap,id=idNVyWKH,vhost=on,queues=8 \
(qemu) qemu-kvm: unable to start vhost net: 14: falling back on userspace virtio
qemu-kvm: unable to start vhost net: 14: falling back on userspace virtio
3.queues number large than CPUs number, qemu output error info.
-smp 8 \
-device virtio-net-pci,mac=9a:89:b9:bc:88:b2,id=idyhQr7l,netdev=idNVyWKH,mq=on,vectors=26,bus=pcie-root-port-3,addr=0x0 \
-netdev tap,id=idNVyWKH,vhost=on,queues=12 \
(qemu) qemu-kvm: unable to start vhost net: 14: falling back on userspace virtio
qemu-kvm: unable to start vhost net: 14: falling back on userspace virtio
Tested on RHEL.8.4 slow train, and now there is no problem. According to comment 5, the problem has not reproduced in RHEL.8.3 slow train. Can you help to check it? Has this problem been resolved on slow trains? If it is fixed, we should change the status of this bug.
Test Version on RHEL.8.4 slow train:
kernel-4.18.0-270.el8.x86_64
qemu-kvm-4.2.0-40.module+el8.4.0+9278+dd53883d.x86_64
Best Regards
Lei Yang
Hi Martin
According to Comments 11,12. Is this problem worth fixing on RHEL8.2.z? If it doesn’t need to be fixed on RHEL8.2.z, can I close the bug as "WONTFIX"? Thanks in advance.
Best Regards
Lei