xref: /openbmc/linux/fs/cachefiles/Kconfig (revision 023e4163)
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