net/sunrpc/cache.c and friends
net/sunrpc/cache.c and include/linux/sunrpc/cache.h implement a rather
complicated caching mechanism which can expire cache entries, make upcalls
to userspace to fill entries, etc.
- sunrpc_svc_cache.txt: notes on the
caching mechanism
- ip_map_cache.txt: notes on the use
of this mechanism to cache information about the "clients" to which a
filesystem is exported.
- export_caches.txt: notes on the use of
this mechanism to cache information about the exports themselves.