Comment 58 for bug 2012763

Hi there,

I just wanted to give a quick update. I still have to perform a "real world" test using the server with more than 300 CPUs, but meanwhile I was able to test the Jammy QEMU from my PPA using a 12-core machine and it seems like we won't need to backport any patches there either. Here's the command line I used:

$ sudo 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"

Upon booting and getting dropped into the initramfs shell, I did a "cat /proc/cpuinfo" and verified that the 300 vCPUs were correctly listed there.

So yeah, good news :-).