Re: [RFC][PATCH] O(1) Entitlement Based Scheduler

[Bill Davidsen <davidsen@tmr.com>]

Mike Fedyk wrote:
> Shailabh Nagar wrote:
> 
>>>> Mike Fedyk wrote:
>>>>
>>>>> Better would be to have the kernel tell the daemon whenever a 
>>>>> process in exec-ed, and you have simplicity in the kernel, and 
>>>>> policy in user space.
>>
>>
>>
>>
>> As it turns out, one can still use a fairly simple in-kernel module 
>> which provides a *mechanism* for effectively changing a process' 
>> entitlement while retaining the policy component in userland.
> 
> 
> How much code could be removed if CKRM triggered a userspace process to 
> perform the operations required?

One other interesting question is what would happen if the userspace 
program didn't run, died, etc. Or set some ill-behaved other user 
program to a higher priority and the other program did a DoS 
(intentional or not)?

I don't like the whole idea, but I like it even less with a user program 
requiring context switches on scheduling.