| # 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_HISTOGRAM |
| bool "Gather latency information on CacheFiles" |
| depends on CACHEFILES && PROC_FS |
| help |
| |
| 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. |
| |
| See Documentation/filesystems/caching/cachefiles.rst for more |
| information. |
