KVM Notes: Difference between revisions
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Correct setting for multi CPU support is <em>kernel="/boot/vmlinuz-smp"</em> | Correct setting for multi CPU support is <em>kernel="/boot/vmlinuz-smp"</em> | ||
====Performance considerations==== | |||
==See also== | ==See also== | ||
[[Kvm]] | [[Kvm]] | ||
Revision as of 11:35, 9 March 2010
Summary
This document contains useful notes from user experience.
Notes
Choosing hardware
When selecting hardware check if it really supports virtualization as that is required for KVM to work. Double check corresponding settings in BIOS, if it is enabled, if it still does not work - check weather motherboard BIOS upgrade is available.
list of CPUs supporting virtualization: Wikipedia about virtualization support on x86 CPUs
In short: If buying Intel CPU double-check if you are getting correct model, if AMD, all new CPUs will support virtualization.
KVM guest multi CPU
When using RouterOS os primary OS on the router changing /system hardware settings will change kernel that is loaded at boot time effectively enabling or disabling SMP support in RouterOS. But using this setting in KVM guest does not work as intended, because in KVM guest configuration user can explicitly point what kernel to use, default setting is kernel="/boot/vmlinuz" that loads guest with non-SMP kernel.
Correct setting for multi CPU support is kernel="/boot/vmlinuz-smp"