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Bug 2003910

Summary: The vm with 12 vfs can not be started successfully.
Product: Red Hat Enterprise Linux 9 Reporter: Yanghang Liu <yanghliu>
Component: qemu-kvmAssignee: Virtualization Maintenance <virt-maint>
qemu-kvm sub component: Devices QA Contact: Yanghang Liu <yanghliu>
Status: CLOSED DUPLICATE Docs Contact:
Severity: high    
Priority: high CC: virt-maint
Version: 9.0Keywords: Regression
Target Milestone: rcFlags: pm-rhel: mirror+
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-09-14 07:25:58 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:

Description Yanghang Liu 2021-09-14 06:53:22 UTC 
Description of problem:
The vm with multiple vfs (vf numbers > 12)can not be started successfully.

Version-Release number of selected component (if applicable):
host:
5.14.0-1.el9.x86_64
qemu-kvm-6.1.0-2.el9.x86_64
guest:
5.14.0-1.el9.x86_64

How reproducible:
100%

Steps to Reproduce:

1. create 12 VFs

echo 12 > /sys/bus/pci/devices/0000\:06\:00.1/sriov_numvfs 

2. start a RHEL90 vm with 12 VFs

The domaim xml is in the attachment

Actual results:
The vm is stuck on "Guest has not initialized the diaplay (yet)" page

Expected results:
The vm can be started successfully

Additional info:
(1) The vm with 11 vfs can be started successfully.
Comment 2 Yanghang Liu 2021-09-14 07:23:03 UTC 
This bug can be reproduced in qemu-kvm-6.1.0-1.el9.x86_64 and qemu-kvm-6.1.0-2.el9.x86_64.

The bug can not be reproduced in qemu-kvm-6.0.0-12.el9.x86_64
Comment 3 Yanghang Liu 2021-09-14 07:25:58 UTC 
This bug should be a duplicate bug of Bug 2001630 - [WRB][virtual network][qemu-6.1.0-1]Can not boot up guest with 14 devices via pcie-root-port.

*** This bug has been marked as a duplicate of bug 2001630 ***