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fscache
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Kconfig

Kconfig 2.3 KB
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  1. 

  2. config FSCACHE
    3. 

  3. 	tristate "General filesystem local caching manager"
    4. 

  4. 	depends on EXPERIMENTAL
    5. 

  5. 	select SLOW_WORK
    6. 

  6. 	help
    7. 

  7. 	  This option enables a generic filesystem caching manager that can be
    8. 

  8. 	  used by various network and other filesystems to cache data locally.
    9. 

  9. 	  Different sorts of caches can be plugged in, depending on the
    10. 

  10. 	  resources available.
    11. 

  11. 

  12. 	  See Documentation/filesystems/caching/fscache.txt for more information.
    13. 

  13. 

  14. config FSCACHE_STATS
    15. 

  15. 	bool "Gather statistical information on local caching"
    16. 

  16. 	depends on FSCACHE && PROC_FS
    17. 

  17. 	help
    18. 

  18. 	  This option causes statistical information to be gathered on local
    19. 

  19. 	  caching and exported through file:
    20. 

  20. 

  21. 		/proc/fs/fscache/stats
    22. 

  22. 

  23. 	  The gathering of statistics adds a certain amount of overhead to
    24. 

  24. 	  execution as there are a quite a few stats gathered, and on a
    25. 

  25. 	  multi-CPU system these may be on cachelines that keep bouncing
    26. 

  26. 	  between CPUs.  On the other hand, the stats are very useful for
    27. 

  27. 	  debugging purposes.  Saying 'Y' here is recommended.
    28. 

  28. 

  29. 	  See Documentation/filesystems/caching/fscache.txt for more information.
    30. 

  30. 

  31. config FSCACHE_HISTOGRAM
    32. 

  32. 	bool "Gather latency information on local caching"
    33. 

  33. 	depends on FSCACHE && PROC_FS
    34. 

  34. 	help
    35. 

  35. 	  This option causes latency information to be gathered on local
    36. 

  36. 	  caching and exported through file:
    37. 

  37. 

  38. 		/proc/fs/fscache/histogram
    39. 

  39. 

  40. 	  The generation of this histogram adds a certain amount of overhead to
    41. 

  41. 	  execution as there are a number of points at which data is gathered,
    42. 

  42. 	  and on a multi-CPU system these may be on cachelines that keep
    43. 

  43. 	  bouncing between CPUs.  On the other hand, the histogram may be
    44. 

  44. 	  useful for debugging purposes.  Saying 'N' here is recommended.
    45. 

  45. 

  46. 	  See Documentation/filesystems/caching/fscache.txt for more information.
    47. 

  47. 

  48. config FSCACHE_DEBUG
    49. 

  49. 	bool "Debug FS-Cache"
    50. 

  50. 	depends on FSCACHE
    51. 

  51. 	help
    52. 

  52. 	  This permits debugging to be dynamically enabled in the local caching
    53. 

  53. 	  management module.  If this is set, the debugging output may be
    54. 

  54. 	  enabled by setting bits in /sys/modules/fscache/parameter/debug.
    55. 

  55. 

  56. 	  See Documentation/filesystems/caching/fscache.txt for more information.
    57. 

  57. 

  58. config FSCACHE_OBJECT_LIST
    59. 

  59. 	bool "Maintain global object list for debugging purposes"
    60. 

  60. 	depends on FSCACHE && PROC_FS
    61. 

  61. 	help
    62. 

  62. 	  Maintain a global list of active fscache objects that can be
    63. 

  63. 	  retrieved through /proc/fs/fscache/objects for debugging purposes
    64.