# SPDX-License-Identifier: GPL-2.0-only
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config CACHEFILES
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tristate "Filesystem caching on files"
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depends on FSCACHE && BLOCK
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help
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This permits use of a mounted filesystem as a cache for other
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filesystems - primarily networking filesystems - thus allowing fast
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local disk to enhance the speed of slower devices.
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See Documentation/filesystems/caching/cachefiles.rst for more
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information.
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config CACHEFILES_DEBUG
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bool "Debug CacheFiles"
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depends on CACHEFILES
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help
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This permits debugging to be dynamically enabled in the filesystem
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caching on files module. If this is set, the debugging output may be
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enabled by setting bits in /sys/modules/cachefiles/parameter/debug or
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by including a debugging specifier in /etc/cachefilesd.conf.
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config CACHEFILES_HISTOGRAM
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bool "Gather latency information on CacheFiles"
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depends on CACHEFILES && PROC_FS
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help
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This option causes latency information to be gathered on CacheFiles
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operation and exported through file:
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/proc/fs/cachefiles/histogram
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The generation of this histogram adds a certain amount of overhead to
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execution as there are a number of points at which data is gathered,
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and on a multi-CPU system these may be on cachelines that keep
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bouncing between CPUs. On the other hand, the histogram may be
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useful for debugging purposes. Saying 'N' here is recommended.
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See Documentation/filesystems/caching/cachefiles.rst for more
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information.
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