[bind10-dev] plan for "background loading"

[Michal 'vorner' Vaner]

Hello

On Fri, Jul 27, 2012 at 05:52:58PM -0700, JINMEI Tatuya / 神明達哉 wrote:
>   - when auth receives a loddzone command from other modules, it wakes
>     up the loader with the information of the zone to be reloaded

I just wanted to point out, there must be some kind of queue of zones waiting to
be reloaded. And, what if we have problems catching up, will the queue grow
indefinitely, or are we expecting to merge requests for the same zone?

> Note that auth needs to acquire the lock everytime it uses
> ConfigurableClientList including for every query processing.
> That's not good for performance, but this shouldn't normally cause
> contention so hopefully the contention-less lock is reasonably cheap.

A friend of mine who digged a little through the linux kernel a measured the
performance of locking says that acquiring an unlocked mutex is almost for free
(it does not even go to kernel space). I'd expect something similar from other
OSes as well.

With regards

-- 
ASHes to ASHes, DOS to DOS.

Michal 'vorner' Vaner
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