[Kimchi-devel] [RFC] - Guest Memory/CPU warning

[Rodrigo Trujillo]

Hi all,

we have recently merged the patches that allow user to change guest 
memory and cpu.
When user change this parameters, we have some problems:

     1- If user assigned more virtual cpus than the amount in the host 
and start the VM, VM will start normally, but the host server will have 
the performance heavily declined.

     2- If user assigned more virtual memory than the physical amount in 
the host, the VM does not start and qemu throws an exception like 
"Cannot allocate memory."

Solutions:

     1a - Show the number of host physical CPUs in edit Template and 
edit Guest windows, then warn the user if he assigns a higher number
     1b - Show the number of host physical CPUs in edit Template and 
edit Guest windows, then does not allow to set up a higher number 
(generate a error during edition)

     2a - Show the host MEMORY amount in edit Template and edit Guest 
windows, then warn the user if he assigns a higher number
     2b - Show the host MEMORY amount in edit Template and edit Guest 
windows, then does not allow to set up a higher number (generate a error 
during edition)

     - A third option would be check the numbers before start a guest 
and warn the user, or does not allow the vm to be started.


I would like to implement 1a and 2b.
Do you have any thoughts or concerns/suggestions ?

Rodrigo Trujillo