1 2config FSCACHE 3 tristate "General filesystem local caching manager" 4 help 5 This option enables a generic filesystem caching manager that can be 6 used by various network and other filesystems to cache data locally. 7 Different sorts of caches can be plugged in, depending on the 8 resources available. 9 10 See Documentation/filesystems/caching/fscache.txt for more information. 11 12config FSCACHE_STATS 13 bool "Gather statistical information on local caching" 14 depends on FSCACHE && PROC_FS 15 help 16 This option causes statistical information to be gathered on local 17 caching and exported through file: 18 19 /proc/fs/fscache/stats 20 21 The gathering of statistics adds a certain amount of overhead to 22 execution as there are a quite a few stats gathered, and on a 23 multi-CPU system these may be on cachelines that keep bouncing 24 between CPUs. On the other hand, the stats are very useful for 25 debugging purposes. Saying 'Y' here is recommended. 26 27 See Documentation/filesystems/caching/fscache.txt for more information. 28 29config FSCACHE_HISTOGRAM 30 bool "Gather latency information on local caching" 31 depends on FSCACHE && PROC_FS 32 help 33 This option causes latency information to be gathered on local 34 caching and exported through file: 35 36 /proc/fs/fscache/histogram 37 38 The generation of this histogram adds a certain amount of overhead to 39 execution as there are a number of points at which data is gathered, 40 and on a multi-CPU system these may be on cachelines that keep 41 bouncing between CPUs. On the other hand, the histogram may be 42 useful for debugging purposes. Saying 'N' here is recommended. 43 44 See Documentation/filesystems/caching/fscache.txt for more information. 45 46config FSCACHE_DEBUG 47 bool "Debug FS-Cache" 48 depends on FSCACHE 49 help 50 This permits debugging to be dynamically enabled in the local caching 51 management module. If this is set, the debugging output may be 52 enabled by setting bits in /sys/modules/fscache/parameter/debug. 53 54 See Documentation/filesystems/caching/fscache.txt for more information. 55 56config FSCACHE_OBJECT_LIST 57 bool "Maintain global object list for debugging purposes" 58 depends on FSCACHE && PROC_FS 59 help 60 Maintain a global list of active fscache objects that can be 61 retrieved through /proc/fs/fscache/objects for debugging purposes 62