Re: Vnode API change: add global vnode cache

[Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost>]

   Date: Mon, 7 Apr 2014 17:27:01 +0100
   From: Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>

   Should be fine, but once tmpfs is switched to use vcache, it might become
   a little bit more visible for some workloads..

Why switch tmpfs to use vcache?  That would add memory and time
overhead for no reason.  struct tmpfs_node already has a map from key
to vnode -- the tn_vnode field.  No need to manage an rb tree to
accomplish the same thing.