Re: guest threads

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

tarski wrote:
> hello everyone,
>     
>      I was just wondering how KVM schedules multiple Virtual machines (guest
> operating systems) running on top of it? If a thread/process blocks on a guest
> os does KVM block the whole virtual machine or are other threads/processes
> running on that particular guest given a chance to run?
>
>   
kvm is not aware of threads and processes within guests.

kvm (actually, the Linux scheduler) will deschedule a guest if one of 
these two conditions occur:

- if the guest executes the 'hlt' instruction (typically when it has no 
processes to run)
- using normal Linux process preemption rules (timeslice expires, higher 
priority thread becomes runnable, etc.)

so it's quite possible for multiple guest threads or processes to run 
within a single host timeslice.

-- 
error compiling committee.c: too many arguments to function


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