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+
+config CACHEFILES
+        tristate "Filesystem caching on files"
+        depends on FSCACHE && BLOCK
+        help
+          This permits use of a mounted filesystem as a cache for other
+          filesystems - primarily networking filesystems - thus allowing fast
+          local disk to enhance the speed of slower devices.
+
+          See Documentation/filesystems/caching/cachefiles.txt for more
+          information.
+
+config CACHEFILES_DEBUG
+        bool "Debug CacheFiles"
+        depends on CACHEFILES
+        help
+          This permits debugging to be dynamically enabled in the filesystem
+          caching on files module.  If this is set, the debugging output may be
+          enabled by setting bits in /sys/modules/cachefiles/parameter/debug or
+          by including a debugging specifier in /etc/cachefilesd.conf.
+
+config CACHEFILES_HISTOGRAM
+        bool "Gather latency information on CacheFiles"
+        depends on CACHEFILES && PROC_FS
+        help
+
+          This option causes latency information to be gathered on CacheFiles
+          operation and exported through file:
+
+                /proc/fs/cachefiles/histogram
+
+          The generation of this histogram adds a certain amount of overhead to
+          execution as there are a number of points at which data is gathered,
+          and on a multi-CPU system these may be on cachelines that keep
+          bouncing between CPUs.  On the other hand, the histogram may be
+          useful for debugging purposes.  Saying 'N' here is recommended.
+
+          See Documentation/filesystems/caching/cachefiles.txt for more
+          information.