1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 2
3 config NETFS_SUPPORT 3 config NETFS_SUPPORT
4 tristate 4 tristate
5 help 5 help
6 This option enables support for netw 6 This option enables support for network filesystems, including
7 helpers for high-level buffered I/O, 7 helpers for high-level buffered I/O, abstracting out read
8 segmentation, local caching and tran 8 segmentation, local caching and transparent huge page support.
9 9
10 config NETFS_STATS 10 config NETFS_STATS
11 bool "Gather statistical information o 11 bool "Gather statistical information on local caching"
12 depends on NETFS_SUPPORT && PROC_FS 12 depends on NETFS_SUPPORT && PROC_FS
13 help 13 help
14 This option causes statistical infor 14 This option causes statistical information to be gathered on local
15 caching and exported through file: 15 caching and exported through file:
16 16
17 /proc/fs/fscache/stats 17 /proc/fs/fscache/stats
18 18
19 The gathering of statistics adds a c 19 The gathering of statistics adds a certain amount of overhead to
20 execution as there are a quite a few 20 execution as there are a quite a few stats gathered, and on a
21 multi-CPU system these may be on cac 21 multi-CPU system these may be on cachelines that keep bouncing
22 between CPUs. On the other hand, th 22 between CPUs. On the other hand, the stats are very useful for
23 debugging purposes. Saying 'Y' here 23 debugging purposes. Saying 'Y' here is recommended.
24 24
25 config NETFS_DEBUG 25 config NETFS_DEBUG
26 bool "Enable dynamic debugging netfsli 26 bool "Enable dynamic debugging netfslib and FS-Cache"
27 depends on NETFS_SUPPORT 27 depends on NETFS_SUPPORT
28 help 28 help
29 This permits debugging to be dynamic 29 This permits debugging to be dynamically enabled in the local caching
30 management module. If this is set, 30 management module. If this is set, the debugging output may be
31 enabled by setting bits in /sys/modu 31 enabled by setting bits in /sys/module/netfs/parameters/debug.
32 32
33 config FSCACHE 33 config FSCACHE
34 bool "General filesystem local caching 34 bool "General filesystem local caching manager"
35 depends on NETFS_SUPPORT 35 depends on NETFS_SUPPORT
36 help 36 help
37 This option enables a generic filesy 37 This option enables a generic filesystem caching manager that can be
38 used by various network and other fi 38 used by various network and other filesystems to cache data locally.
39 Different sorts of caches can be plu 39 Different sorts of caches can be plugged in, depending on the
40 resources available. 40 resources available.
41 41
42 See Documentation/filesystems/cachin 42 See Documentation/filesystems/caching/fscache.rst for more information.
43 43
44 config FSCACHE_STATS 44 config FSCACHE_STATS
45 bool "Gather statistical information o 45 bool "Gather statistical information on local caching"
46 depends on FSCACHE && PROC_FS 46 depends on FSCACHE && PROC_FS
47 select NETFS_STATS 47 select NETFS_STATS
48 help 48 help
49 This option causes statistical infor 49 This option causes statistical information to be gathered on local
50 caching and exported through file: 50 caching and exported through file:
51 51
52 /proc/fs/fscache/stats 52 /proc/fs/fscache/stats
53 53
54 The gathering of statistics adds a c 54 The gathering of statistics adds a certain amount of overhead to
55 execution as there are a quite a few 55 execution as there are a quite a few stats gathered, and on a
56 multi-CPU system these may be on cac 56 multi-CPU system these may be on cachelines that keep bouncing
57 between CPUs. On the other hand, th 57 between CPUs. On the other hand, the stats are very useful for
58 debugging purposes. Saying 'Y' here 58 debugging purposes. Saying 'Y' here is recommended.
59 59
60 See Documentation/filesystems/cachin 60 See Documentation/filesystems/caching/fscache.rst for more information.
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