There is a new filter point for ns_register_filter called prequeue.

It isn't very useful because it runs in the driver thread, blocking the loop 
until it finishes with all prequeue filters that match. (There may actually 
be spins wasted on every request looking for matches, haven't checked that.)

But it is there and I used it for some testing. What I found out is that it 
causes a massive memory leak, about 1.5MB per request. Maybe an interp is 
being stranded with every request or something. 

Anyway, just a note that this feature isn't consistent with the other filter 
points, and has serious problems. The good news is that it is easy to 
identify. Your machine will eventually grind to a halt. 

tom jackson


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