Re: [Lse-tech] Re: A common layer for Accounting packages

Jay Lan
2005-02-24T22:28:51Z

Tim Schmielau wrote:
> On Tue, 22 Feb 2005, Andrew Morton wrote:
>
>
>>We really want to avoid doing such stuff in-kernel if at all possible, of
>>course.
>>
>>Is it not possible to implement the fork/exec/exit notifications to
>>userspace so that a daemon can track the process relationships and perform
>>aggregation based upon individual tasks' accounting? That's what one of
>>the accounting systems is proposing doing, I believe.
>>
>>(In fact, why do we even need the notifications? /bin/ps can work this
>>stuff out).
>
>
>
> I had started a proof of concept implementation that could reconstruct the
> whole process tree from userspace just from the BSD accounting currently
> in the kernel (+ the conceptual bug-fix that I misnamed "[RFC] "biological
> parent" pid"). This could do the whole job ID thing from userspace.
> Unfortunately, I haven't had time to work on it recently.
>
> Also, doing per-job accounting might actually be more lightweight than
> per-process accounting, so I'm not at all opposed to unifying CSA and BSD
> accounting into one mechanism that just writes different file formats.

Thanks, Tim!

After spending some time studying how ELSA works, it appeared to me
that CSA still needs a hook for do_exit. Since people agreed that
a complete framework was an overkill, i would be glad to submit
another patch later just to provide a CSA exit-handling inside the
acct_process().

Thanks,
- jay

>
> A complete framework seems like overkill to me, too.
>
> Tim
>
>
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