projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 06b3db1b DH |
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 | ||
| 7394daa8 DH |
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 | ||
| 06b3db1b DH |
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. |