fs/cachefiles/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2
   3 config CACHEFILES
   4         tristate "Filesystem caching on files"
   5         depends on FSCACHE && BLOCK
   6         help
   7           This permits use of a mounted filesystem as a cache for other
   8           filesystems - primarily networking filesystems - thus allowing fast
   9           local disk to enhance the speed of slower devices.
  10
  11           See Documentation/filesystems/caching/cachefiles.txt for more
  12           information.
  13
  14 config CACHEFILES_DEBUG
  15         bool "Debug CacheFiles"
  16         depends on CACHEFILES
  17         help
  18           This permits debugging to be dynamically enabled in the filesystem
  19           caching on files module.  If this is set, the debugging output may be
  20           enabled by setting bits in /sys/modules/cachefiles/parameter/debug or
  21           by including a debugging specifier in /etc/cachefilesd.conf.
  22
  23 config CACHEFILES_HISTOGRAM
  24         bool "Gather latency information on CacheFiles"
  25         depends on CACHEFILES && PROC_FS
  26         help
  27
  28           This option causes latency information to be gathered on CacheFiles
  29           operation and exported through file:
  30
  31                 /proc/fs/cachefiles/histogram
  32
  33           The generation of this histogram adds a certain amount of overhead to
  34           execution as there are a number of points at which data is gathered,
  35           and on a multi-CPU system these may be on cachelines that keep
  36           bouncing between CPUs.  On the other hand, the histogram may be
  37           useful for debugging purposes.  Saying 'N' here is recommended.
  38
  39           See Documentation/filesystems/caching/cachefiles.txt for more
  40           information.