re: Problem with autounload of nfsserver module

[Paul Goyette <paul%whooppee.com@localhost>]

On Sun, 15 Dec 2013, matthew green wrote:

> does it reload and reexport file systems if you mount something and
> mountd should be told to export it?

If the nfsserver module has been unloaded, and then you update the 
/etc/exports files (and HUP mountd), then mountd will call the nfssvc 
sys-call which will trigger an auto-load of the nfsserver module.

However, the module would only have been unloaded if the previous list 
of exports was empty;  if there were any exports previously, the module 
would not have been unloaded and therefore would not need re-loading.


> i don't see any utility in having nfs server auto unload.

It's no different than any other auto-loaded module, such as compat.  If 
a module is auto-loaded, the system makes a single attempt (after an 
appropriate timeout) to auto-unload.  The module is notified and given 
an opportunity to prevent the unload.


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