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David Howells06b3db12009-04-03 16:42:36 +01001
2config FSCACHE
3 tristate "General filesystem local caching manager"
4 depends on EXPERIMENTAL
5 select SLOW_WORK
6 help
7 This option enables a generic filesystem caching manager that can be
8 used by various network and other filesystems to cache data locally.
9 Different sorts of caches can be plugged in, depending on the
10 resources available.
11
12 See Documentation/filesystems/caching/fscache.txt for more information.
13
David Howells7394daa2009-04-03 16:42:37 +010014config FSCACHE_STATS
15 bool "Gather statistical information on local caching"
16 depends on FSCACHE && PROC_FS
17 help
18 This option causes statistical information to be gathered on local
19 caching and exported through file:
20
21 /proc/fs/fscache/stats
22
23 The gathering of statistics adds a certain amount of overhead to
24 execution as there are a quite a few stats gathered, and on a
25 multi-CPU system these may be on cachelines that keep bouncing
26 between CPUs. On the other hand, the stats are very useful for
27 debugging purposes. Saying 'Y' here is recommended.
28
29 See Documentation/filesystems/caching/fscache.txt for more information.
30
31config FSCACHE_HISTOGRAM
32 bool "Gather latency information on local caching"
33 depends on FSCACHE && PROC_FS
34 help
35 This option causes latency information to be gathered on local
36 caching and exported through file:
37
38 /proc/fs/fscache/histogram
39
40 The generation of this histogram adds a certain amount of overhead to
41 execution as there are a number of points at which data is gathered,
42 and on a multi-CPU system these may be on cachelines that keep
43 bouncing between CPUs. On the other hand, the histogram may be
44 useful for debugging purposes. Saying 'N' here is recommended.
45
46 See Documentation/filesystems/caching/fscache.txt for more information.
47
David Howells06b3db12009-04-03 16:42:36 +010048config FSCACHE_DEBUG
49 bool "Debug FS-Cache"
50 depends on FSCACHE
51 help
52 This permits debugging to be dynamically enabled in the local caching
53 management module. If this is set, the debugging output may be
54 enabled by setting bits in /sys/modules/fscache/parameter/debug.
55
56 See Documentation/filesystems/caching/fscache.txt for more information.