Jail-Aware Scheduling

[Chris Jones]

Hi, folks --- as some of you might know, FreeBSD has a Summer of Code  
project to bring resource limits to jails, and one part of that is to  
permit an administrator to put limits on a jail's CPU usage.  That's  
where I come in: I'm the guy doing the project, and I've been  
spending the last two weeks coming up to speed on scheduling and the  
like.

What I'd like from freebsd-hackers is the following:

   - are there any good references on scheduling that you know of  
which I should read?  I've already got Design & Implementation of  
FreeBSD and the Petrou / Milford / Gibson and Waldspurger / Weihl  
papers on lottery scheduling.

   - what're your thoughts on making the existing scheduler jail- 
aware as opposed to writing a sort of 'meta-scheduler' that would  
schedule between jails, and then delegate to a scheduler per jail  
(which could be very similar, if not identical, to the existing  
scheduler)?  I've got some very preliminary thoughts on this, but I'd  
like to hear what you've got to say, as I'm aware that this is  
rather ... complex.

Thanks,

Chris