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