blob: 80e9c6167f0b0f70c3b63bafcf7681088b687715 [file] [log] [blame]
David Howells9ae326a2009-04-03 16:42:41 +01001
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.