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linux-phytium
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fs
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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. 	help
    5. 

  5. 	  This option enables a generic filesystem caching manager that can be
    6. 

  6. 	  used by various network and other filesystems to cache data locally.
    7. 

  7. 	  Different sorts of caches can be plugged in, depending on the
    8. 

  8. 	  resources available.
    9. 

  9. 

  10. 	  See Documentation/filesystems/caching/fscache.txt for more information.
    11. 

  11. 

  12. config FSCACHE_STATS
    13. 

  13. 	bool "Gather statistical information on local caching"
    14. 

  14. 	depends on FSCACHE && PROC_FS
    15. 

  15. 	help
    16. 

  16. 	  This option causes statistical information to be gathered on local
    17. 

  17. 	  caching and exported through file:
    18. 

  18. 

  19. 		/proc/fs/fscache/stats
    20. 

  20. 

  21. 	  The gathering of statistics adds a certain amount of overhead to
    22. 

  22. 	  execution as there are a quite a few stats gathered, and on a
    23. 

  23. 	  multi-CPU system these may be on cachelines that keep bouncing
    24. 

  24. 	  between CPUs.  On the other hand, the stats are very useful for
    25. 

  25. 	  debugging purposes.  Saying 'Y' here is recommended.
    26. 

  26. 

  27. 	  See Documentation/filesystems/caching/fscache.txt for more information.
    28. 

  28. 

  29. config FSCACHE_HISTOGRAM
    30. 

  30. 	bool "Gather latency information on local caching"
    31. 

  31. 	depends on FSCACHE && PROC_FS
    32. 

  32. 	help
    33. 

  33. 	  This option causes latency information to be gathered on local
    34. 

  34. 	  caching and exported through file:
    35. 

  35. 

  36. 		/proc/fs/fscache/histogram
    37. 

  37. 

  38. 	  The generation of this histogram adds a certain amount of overhead to
    39. 

  39. 	  execution as there are a number of points at which data is gathered,
    40. 

  40. 	  and on a multi-CPU system these may be on cachelines that keep
    41. 

  41. 	  bouncing between CPUs.  On the other hand, the histogram may be
    42. 

  42. 	  useful for debugging purposes.  Saying 'N' here is recommended.
    43. 

  43. 

  44. 	  See Documentation/filesystems/caching/fscache.txt for more information.
    45. 

  45. 

  46. config FSCACHE_DEBUG
    47. 

  47. 	bool "Debug FS-Cache"
    48. 

  48. 	depends on FSCACHE
    49. 

  49. 	help
    50. 

  50. 	  This permits debugging to be dynamically enabled in the local caching
    51. 

  51. 	  management module.  If this is set, the debugging output may be
    52. 

  52. 	  enabled by setting bits in /sys/modules/fscache/parameter/debug.
    53. 

  53. 

  54. 	  See Documentation/filesystems/caching/fscache.txt for more information.
    55. 

  55. 

  56. config FSCACHE_OBJECT_LIST
    57. 

  57. 	bool "Maintain global object list for debugging purposes"
    58. 

  58. 	depends on FSCACHE && PROC_FS
    59. 

  59. 	help
    60. 

  60. 	  Maintain a global list of active fscache objects that can be
    61. 

  61. 	  retrieved through /proc/fs/fscache/objects for debugging purposes
    62. 

  62.