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1 | |
2 | config 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 | |
13 | config 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 | |
22 | config 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 |
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