| David Howells | 06b3db1 | 2009-04-03 16:42:36 +0100 | [diff] [blame] | 1 | |
| 2 | config 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 Howells | 7394daa | 2009-04-03 16:42:37 +0100 | [diff] [blame^] | 14 | config 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 | |
| 31 | config 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 Howells | 06b3db1 | 2009-04-03 16:42:36 +0100 | [diff] [blame] | 48 | config 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. |