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

 1# SPDX-License-Identifier: GPL-2.0-only
 2
 3config CACHEFILES
 4	tristate "Filesystem caching on files"
 5	depends on NETFS_SUPPORT && 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.