Re: patch for virtual machine oriented scheduling(1)

[Avi Kivity <avi@redhat.com>]

alex wrote:
>> Just wondering, was it not possible to introduce a new scheduling class in
>> the current scheduler?  My impression was that the current scheduler was
>> fairly modular and should allow this.
>>
>> -Andrew
>>     
> The reasons are:
> 1. I am afraid that modifications to the Linux scheduler might cause
> unexpected effects, because it is a global one.
>   

True, extra care is needed.

> 2. an extra execution control solution like mine is the simplest one
> to implement.
>   

But it results in an overall more complex system.

> 3. As far as I can see, the benefit of replacing Linux scheduler only
> lies that as soon as a scheduling decision is made, it can be put into
> practice immediately. I think this benefit is neglectable.
>   

It also make maintenance easier, and brings the benefits to ordinary 
(non-kvm) processes.

-- 
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