Performing the verification on Mantic.
First, reproduce the problem.
# apt policy qemu-system-x86
qemu-system-x86:
Installed: 1:8.0.4+dfsg-1ubuntu3.23.10.3
Candidate: 1:8.0.4+dfsg-1ubuntu3.23.10.3
Version table:
*** 1:8.0.4+dfsg-1ubuntu3.23.10.3 500
500 http://archive.ubuntu.com/ubuntu mantic-updates/main amd64 Packages
100 /var/lib/dpkg/status
1:8.0.4+dfsg-1ubuntu3.23.10.2 500
500 http://security.ubuntu.com/ubuntu mantic-security/main amd64
Packages
1:8.0.4+dfsg-1ubuntu3 500
500 http://archive.ubuntu.com/ubuntu mantic/main amd64 Packages
# qemu-system-x86_64 -M pc-q35-jammy,accel=kvm,kernel-irqchip=split -device
intel-iommu,intremap=on -smp cpus=300,maxcpus=300 -enable-kvm -net none -m
4096M -nographic -kernel /boot/vmlinuz -initrd /boot/initrd.img -chardev
stdio,mux=on,id=char0 -mon chardev=char0,mode=readline -serial chardev:char0
-append "console=ttyS0"
qemu-system-x86_64: Invalid SMP CPUs 300. The max CPUs supported by machine
'pc-q35-jammy' is 288
# qemu-system-x86_64 -M pc-q35-mantic,accel=kvm,kernel-irqchip=split -device
intel-iommu,intremap=on -smp cpus=300,maxcpus=300 -enable-kvm -net none -m
4096M -nographic -kernel /boot/vmlinuz -initrd /boot/initrd.img -chardev
stdio,mux=on,id=char0 -mon chardev=char0,mode=readline -serial chardev:char0
-append "console=ttyS0"
qemu-system-x86_64: Invalid SMP CPUs 300. The max CPUs supported by machine
'pc-q35-mantic' is 288
Now, verifying that the package from mantic-proposed fixes the issue:
# apt policy qemu-system-x86
qemu-system-x86:
Installed: 1:8.0.4+dfsg-1ubuntu3.23.10.4
Candidate: 1:8.0.4+dfsg-1ubuntu3.23.10.4
Version table:
*** 1:8.0.4+dfsg-1ubuntu3.23.10.4 100
100 http://archive.ubuntu.com/ubuntu mantic-proposed/main amd64 Packages
100 /var/lib/dpkg/status
1:8.0.4+dfsg-1ubuntu3.23.10.3 500
500 http://archive.ubuntu.com/ubuntu mantic-updates/main amd64 Packages
1:8.0.4+dfsg-1ubuntu3.23.10.2 500
500 http://security.ubuntu.com/ubuntu mantic-security/main amd64
Packages
1:8.0.4+dfsg-1ubuntu3 500
500 http://archive.ubuntu.com/ubuntu mantic/main amd64 Packages
# qemu-system-x86_64 -M pc-q35-jammy-maxcpus,accel=kvm,kernel-irqchip=split
-device intel-iommu,intremap=on -smp cpus=300,maxcpus=300 -enable-kvm -net none
-m 4096M -nographic -kernel /boot/vmlinuz -initrd /boot/initrd.img -chardev
stdio,mux=on,id=char0 -mon chardev=char0,mode=readline -serial chardev:char0
-append "console=ttyS0"
< all worked as expected >
# qemu-system-x86_64 -M pc-q35-mantic-maxcpus,accel=kvm,kernel-irqchip=split
-device intel-iommu,intremap=on -smp cpus=300,maxcpus=300 -enable-kvm -net none
-m 4096M -nographic -kernel /boot/vmlinuz -initrd /boot/initrd.img -chardev
stdio,mux=on,id=char0 -mon chardev=char0,mode=readline -serial chardev:char0
-append "console=ttyS0"
qemu-system-x86_64: Invalid SMP CPUs 300. The max CPUs supported by machine
'pc-q35-mantic-maxcpus' is 288
As can be seen above, there is a problem with the new pc-q35-mantic-
maxcpus machine type. As such, I am tagging this bug as verification-
mantic-failed and will upload a fix for the issue.
** Tags removed: verification-needed verification-needed-mantic
** Tags added: verification-failed-mantic
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https://bugs.launchpad.net/bugs/2012763
Title:
qemu-system-amd64 max cpus is too low for latest processors
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