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@@ -65,18 +65,19 @@ config XFS_POSIX_ACL
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If you don't know what Access Control Lists are, say N.
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config XFS_RT
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- bool "XFS Realtime support (EXPERIMENTAL)"
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- depends on XFS_FS && EXPERIMENTAL
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+ bool "XFS Realtime subvolume support"
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+ depends on XFS_FS
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help
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If you say Y here you will be able to mount and use XFS filesystems
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- which contain a realtime subvolume. The realtime subvolume is a
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- separate area of disk space where only file data is stored. The
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- realtime subvolume is designed to provide very deterministic
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- data rates suitable for media streaming applications.
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-
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- See the xfs man page in section 5 for a bit more information.
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+ which contain a realtime subvolume. The realtime subvolume is a
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+ separate area of disk space where only file data is stored. It was
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+ originally designed to provide deterministic data rates suitable
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+ for media streaming applications, but is also useful as a generic
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+ mechanism for ensuring data and metadata/log I/Os are completely
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+ separated. Regular file I/Os are isolated to a separate device
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+ from all other requests, and this can be done quite transparently
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+ to applications via the inherit-realtime directory inode flag.
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- This feature is unsupported at this time, is not yet fully
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- functional, and may cause serious problems.
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+ See the xfs man page in section 5 for additional information.
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If unsure, say N.
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Nathan Scott