|  | # SPDX-License-Identifier: GPL-2.0-only | 
|  |  | 
|  | config CACHEFILES | 
|  | tristate "Filesystem caching on files" | 
|  | depends on FSCACHE && BLOCK | 
|  | help | 
|  | This permits use of a mounted filesystem as a cache for other | 
|  | filesystems - primarily networking filesystems - thus allowing fast | 
|  | local disk to enhance the speed of slower devices. | 
|  |  | 
|  | See Documentation/filesystems/caching/cachefiles.rst for more | 
|  | information. | 
|  |  | 
|  | config CACHEFILES_DEBUG | 
|  | bool "Debug CacheFiles" | 
|  | depends on CACHEFILES | 
|  | help | 
|  | This permits debugging to be dynamically enabled in the filesystem | 
|  | caching on files module.  If this is set, the debugging output may be | 
|  | enabled by setting bits in /sys/modules/cachefiles/parameter/debug or | 
|  | by including a debugging specifier in /etc/cachefilesd.conf. | 
|  |  | 
|  | config CACHEFILES_ERROR_INJECTION | 
|  | bool "Provide error injection for cachefiles" | 
|  | depends on CACHEFILES && SYSCTL | 
|  | help | 
|  | This permits error injection to be enabled in cachefiles whilst a | 
|  | cache is in service. | 
|  |  | 
|  | config CACHEFILES_ONDEMAND | 
|  | bool "Support for on-demand read" | 
|  | depends on CACHEFILES | 
|  | default n | 
|  | help | 
|  | This permits userspace to enable the cachefiles on-demand read mode. | 
|  | In this mode, when a cache miss occurs, responsibility for fetching | 
|  | the data lies with the cachefiles backend instead of with the netfs | 
|  | and is delegated to userspace. | 
|  |  | 
|  | If unsure, say N. |