1# SPDX-License-Identifier: GPL-2.0-only 2 3config 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.rst for more 12 information. 13 14config 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 23config CACHEFILES_ERROR_INJECTION 24 bool "Provide error injection for cachefiles" 25 depends on CACHEFILES && SYSCTL 26 help 27 This permits error injection to be enabled in cachefiles whilst a 28 cache is in service. 29 30config CACHEFILES_ONDEMAND 31 bool "Support for on-demand read" 32 depends on CACHEFILES 33 default n 34 help 35 This permits userspace to enable the cachefiles on-demand read mode. 36 In this mode, when a cache miss occurs, responsibility for fetching 37 the data lies with the cachefiles backend instead of with the netfs 38 and is delegated to userspace. 39 40 If unsure, say N. 41