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SubjectRe: [Lse-tech] Re: A common layer for Accounting packages
Chris Wright wrote:
> * Jay Lan ( wrote:
>>Andrew Morton wrote:
>>>Kaigai Kohei <> wrote:
>>>>In my understanding, what Andrew Morton said is "If target functionality
>>>>implement in user space only, then we should not modify the kernel-tree".
>>>fork, exec and exit upcalls sound pretty good to me. As long as
>>>a) they use the same common machinery and
>>>b) they are next-to-zero cost if something is listening on the netlink
>>> socket but no accounting daemon is running.
>>>Question is: is this sufficient for CSA?
>>Yes, fork, exec, and exit upcalls are sufficient for CSA.
> As soon as you want to throttle tasks at the Job level, this would be
> insufficient. But, IIRC, that's not one of PAGG/Job/CSA's requirements
> right?

PAGG serves more than JOB+CSA.

I am looking into possiblity/feasibility of implementing JOB at
userspace. However, even with JOB as a kernel module, the fork,
exec and exit upcalls would be sufficient to support JOB+CSA.

- jay

> thanks,
> -chris

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