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 FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 	tristate "General filesystem local caching manager"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 	  This option enables a generic filesystem caching manager that can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 	  used by various network and other filesystems to cache data locally.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	  Different sorts of caches can be plugged in, depending on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	  resources available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	  See Documentation/filesystems/caching/fscache.rst for more information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) config FSCACHE_STATS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	bool "Gather statistical information on local caching"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	depends on FSCACHE && PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	  This option causes statistical information to be gathered on local
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	  caching and exported through file:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		/proc/fs/fscache/stats
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	  The gathering of statistics adds a certain amount of overhead to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	  execution as there are a quite a few stats gathered, and on a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	  multi-CPU system these may be on cachelines that keep bouncing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	  between CPUs.  On the other hand, the stats are very useful for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	  debugging purposes.  Saying 'Y' here is recommended.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	  See Documentation/filesystems/caching/fscache.rst for more information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) config FSCACHE_HISTOGRAM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	bool "Gather latency information on local caching"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	depends on FSCACHE && PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	  This option causes latency information to be gathered on local
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	  caching and exported through file:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		/proc/fs/fscache/histogram
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	  The generation of this histogram adds a certain amount of overhead to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	  execution as there are a number of points at which data is gathered,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	  and on a multi-CPU system these may be on cachelines that keep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	  bouncing between CPUs.  On the other hand, the histogram may be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	  useful for debugging purposes.  Saying 'N' here is recommended.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	  See Documentation/filesystems/caching/fscache.rst for more information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) config FSCACHE_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	bool "Debug FS-Cache"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	depends on FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	  This permits debugging to be dynamically enabled in the local caching
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	  management module.  If this is set, the debugging output may be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	  enabled by setting bits in /sys/modules/fscache/parameter/debug.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	  See Documentation/filesystems/caching/fscache.rst for more information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) config FSCACHE_OBJECT_LIST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	bool "Maintain global object list for debugging purposes"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	depends on FSCACHE && PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	  Maintain a global list of active fscache objects that can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	  retrieved through /proc/fs/fscache/objects for debugging purposes