Daniel,
I'm not sure what benefit you get from making this per-namespace.
The point of it is really to prevent one (non-root, even) application from
killing machine performance with source filters (because maintaining them
is an n^2 algorithm). It's a weak constraint, but the resources it's
protecting are
the processor and MLDv2 packet counts. If any one namespace has a
large value, all will have a problem still, and (even without your
patch),
lots of separate source filters can still cause a problem. What it catches
is one application creating thousands (or millions) of source filters and
killing the machine and network with MLDv2 reports as a result. Why
shouldn't that remain global?
+-DLS
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