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Hot-Add CPU not working on Ubuntu
Hot-Add CPU not working on Ubuntu
Problem
Although Hot added CPUs are identified and registered by the kernel, CPUs are not brought online.
Solution
Create a udev
rule to automatically enable the hot added CPU as follows.
Create a new
udev
rule99-vmware-cpuhotplug-udev.rules
under/etc/udev/rules.d
directory, then add the following line into the file:# VMware CPU HotPlug automatization # Automatically bring on-line added processors. # SUBSYSTEM=="cpu", ACTION=="add", TEST=="online", ATTR{online}=="0", ATTR{online}="1"
Restart the udev:
systemctl restart udev
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