This issue is fixed in kernel-6.2.0-23-generic of Ubuntu 23.04. But Cpu-Hotplug starts to fail in kernel-5.19.0-45-generic of Ubuntu22.04.2 and Ubuntu 22.10, it works well in kernel-5.19.0-43-generic.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2015608 Title: cannot hotplug a cpu for ubuntu23.04 VM running on ESXi Status in linux package in Ubuntu: Confirmed Bug description: hot-plugging a cpu for ubuntu23.04 vm running on ESXi is failed, below logs is reported in kern.log 2023-04-07T22:10:15.427140+00:00 vmware-server kernel: [ 123.514678] APIC: NR_CPUS/possible_cpus limit of 3 reached. Processor 3/0x6 ignored. 2023-04-07T22:10:15.427903+00:00 vmware-server kernel: [ 123.514682] ACPI: Unable to map lapic to logical cpu number =========== running "chcpu -e 4", "chcpu: CPU 4 does not exist" after reboot the VM, the hot-plugged cpu can be detected by default. =========== other information: This isue cannot be reproduced in ubuntu22.04.2 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2015608/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
