diff options
Diffstat (limited to 'fs/cachefiles/Kconfig')
| -rw-r--r-- | fs/cachefiles/Kconfig | 35 |
1 files changed, 18 insertions, 17 deletions
diff --git a/fs/cachefiles/Kconfig b/fs/cachefiles/Kconfig index 80e9c6167f0b..c5a070550ee3 100644 --- a/fs/cachefiles/Kconfig +++ b/fs/cachefiles/Kconfig @@ -1,13 +1,14 @@ +# SPDX-License-Identifier: GPL-2.0-only config CACHEFILES tristate "Filesystem caching on files" - depends on FSCACHE && BLOCK + depends on NETFS_SUPPORT && 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.txt for more + See Documentation/filesystems/caching/cachefiles.rst for more information. config CACHEFILES_DEBUG @@ -19,21 +20,21 @@ config CACHEFILES_DEBUG enabled by setting bits in /sys/modules/cachefiles/parameter/debug or by including a debugging specifier in /etc/cachefilesd.conf. -config CACHEFILES_HISTOGRAM - bool "Gather latency information on CacheFiles" - depends on CACHEFILES && PROC_FS +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. - This option causes latency information to be gathered on CacheFiles - operation and exported through file: - - /proc/fs/cachefiles/histogram - - The generation of this histogram adds a certain amount of overhead to - execution as there are a number of points at which data is gathered, - and on a multi-CPU system these may be on cachelines that keep - bouncing between CPUs. On the other hand, the histogram may be - useful for debugging purposes. Saying 'N' here is recommended. +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. - See Documentation/filesystems/caching/cachefiles.txt for more - information. + If unsure, say N. |