1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 2
3 config CACHEFILES 3 config CACHEFILES
4 tristate "Filesystem caching on files" 4 tristate "Filesystem caching on files"
5 depends on NETFS_SUPPORT && FSCACHE && 5 depends on NETFS_SUPPORT && FSCACHE && BLOCK
6 help 6 help
7 This permits use of a mounted filesy 7 This permits use of a mounted filesystem as a cache for other
8 filesystems - primarily networking f 8 filesystems - primarily networking filesystems - thus allowing fast
9 local disk to enhance the speed of s 9 local disk to enhance the speed of slower devices.
10 10
11 See Documentation/filesystems/cachin 11 See Documentation/filesystems/caching/cachefiles.rst for more
12 information. 12 information.
13 13
14 config CACHEFILES_DEBUG 14 config CACHEFILES_DEBUG
15 bool "Debug CacheFiles" 15 bool "Debug CacheFiles"
16 depends on CACHEFILES 16 depends on CACHEFILES
17 help 17 help
18 This permits debugging to be dynamic 18 This permits debugging to be dynamically enabled in the filesystem
19 caching on files module. If this is 19 caching on files module. If this is set, the debugging output may be
20 enabled by setting bits in /sys/modu 20 enabled by setting bits in /sys/modules/cachefiles/parameter/debug or
21 by including a debugging specifier i 21 by including a debugging specifier in /etc/cachefilesd.conf.
22 22
23 config CACHEFILES_ERROR_INJECTION 23 config CACHEFILES_ERROR_INJECTION
24 bool "Provide error injection for cach 24 bool "Provide error injection for cachefiles"
25 depends on CACHEFILES && SYSCTL 25 depends on CACHEFILES && SYSCTL
26 help 26 help
27 This permits error injection to be e 27 This permits error injection to be enabled in cachefiles whilst a
28 cache is in service. 28 cache is in service.
29 29
30 config CACHEFILES_ONDEMAND 30 config CACHEFILES_ONDEMAND
31 bool "Support for on-demand read" 31 bool "Support for on-demand read"
32 depends on CACHEFILES 32 depends on CACHEFILES
33 default n 33 default n
34 help 34 help
35 This permits userspace to enable the 35 This permits userspace to enable the cachefiles on-demand read mode.
36 In this mode, when a cache miss occu 36 In this mode, when a cache miss occurs, responsibility for fetching
37 the data lies with the cachefiles ba 37 the data lies with the cachefiles backend instead of with the netfs
38 and is delegated to userspace. 38 and is delegated to userspace.
39 39
40 If unsure, say N. 40 If unsure, say N.
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