Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) # SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) config CACHEFILES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 	tristate "Filesystem caching on files"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 	depends on FSCACHE && BLOCK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 	  This permits use of a mounted filesystem as a cache for other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	  filesystems - primarily networking filesystems - thus allowing fast
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	  local disk to enhance the speed of slower devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	  See Documentation/filesystems/caching/cachefiles.rst for more
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	  information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) config CACHEFILES_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	bool "Debug CacheFiles"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	depends on CACHEFILES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	  This permits debugging to be dynamically enabled in the filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	  caching on files module.  If this is set, the debugging output may be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	  enabled by setting bits in /sys/modules/cachefiles/parameter/debug or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	  by including a debugging specifier in /etc/cachefilesd.conf.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) config CACHEFILES_HISTOGRAM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	bool "Gather latency information on CacheFiles"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	depends on CACHEFILES && PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	  This option causes latency information to be gathered on CacheFiles
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	  operation and exported through file:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		/proc/fs/cachefiles/histogram
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	  The generation of this histogram adds a certain amount of overhead to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	  execution as there are a number of points at which data is gathered,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	  and on a multi-CPU system these may be on cachelines that keep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	  bouncing between CPUs.  On the other hand, the histogram may be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	  useful for debugging purposes.  Saying 'N' here is recommended.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	  See Documentation/filesystems/caching/cachefiles.rst for more
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	  information.