Perpetually incomplete
To check if you can run hosted hypervisors run:
cat /sys/module/kvm_intel/parameters/nested
If it returns ‘Y’ you are good to go, and actually don’t need this article, if it returns ‘N’ you can enable nested virtualization for the current boot
Continue reading “Linux Enable KVM guest hypervisors (nested hypervisors)”
If you run a lot of Virtual Machines using qemu, you probably can save a lot of memory, at the expense of CPU cycles, by enabling Kernel Samepage Merging (KSM).
If you just want to test it and run only on the current boot run the following:
echo 1 > /sys/kernel/mm/ksm/run
After testing if you want to enable it permanently you can use systemd temporary files.
Continue reading “Enable KSM Centos7/Debian”