1 2config CACHEFILES 3 tristate "Filesystem caching on files" 4 depends on FSCACHE && BLOCK 5 help 6 This permits use of a mounted filesystem as a cache for other 7 filesystems - primarily networking filesystems - thus allowing fast 8 local disk to enhance the speed of slower devices. 9 10 See Documentation/filesystems/caching/cachefiles.txt for more 11 information. 12 13config CACHEFILES_DEBUG 14 bool "Debug CacheFiles" 15 depends on CACHEFILES 16 help 17 This permits debugging to be dynamically enabled in the filesystem 18 caching on files module. If this is set, the debugging output may be 19 enabled by setting bits in /sys/modules/cachefiles/parameter/debug or 20 by including a debugging specifier in /etc/cachefilesd.conf. 21 22config CACHEFILES_HISTOGRAM 23 bool "Gather latency information on CacheFiles" 24 depends on CACHEFILES && PROC_FS 25 help 26 27 This option causes latency information to be gathered on CacheFiles 28 operation and exported through file: 29 30 /proc/fs/cachefiles/histogram 31 32 The generation of this histogram adds a certain amount of overhead to 33 execution as there are a number of points at which data is gathered, 34 and on a multi-CPU system these may be on cachelines that keep 35 bouncing between CPUs. On the other hand, the histogram may be 36 useful for debugging purposes. Saying 'N' here is recommended. 37 38 See Documentation/filesystems/caching/cachefiles.txt for more 39 information. 40