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- menu "Overlay filesystems"
- config ADK_KERNEL_AUFS_FS
- bool "Aufs (Advanced multi layered unification filesystem) support"
- help
- Aufs is a stackable unification filesystem such as Unionfs,
- which unifies several directories and provides a merged single
- directory.
- In the early days, aufs was entirely re-designed and
- re-implemented Unionfs Version 1.x series. Introducing many
- original ideas, approaches and improvements, it becomes totally
- different from Unionfs while keeping the basic features.
- if ADK_KERNEL_AUFS_FS
- choice
- boolean "Maximum number of branches"
- default ADK_KERNEL_AUFS_BRANCH_MAX_127
- help
- Specifies the maximum number of branches (or member directories)
- in a single aufs. The larger value consumes more system
- resources and has a minor impact to performance.
- config ADK_KERNEL_AUFS_BRANCH_MAX_127
- bool "127"
- config ADK_KERNEL_AUFS_BRANCH_MAX_511
- bool "511"
- config ADK_KERNEL_AUFS_BRANCH_MAX_1023
- bool "1023"
- config ADK_KERNEL_AUFS_BRANCH_MAX_32767
- bool "32767"
- endchoice
- config ADK_KERNEL_AUFS_HINOTIFY
- bool "Use inotify to detect actions on a branch"
- select ADK_KERNEL_INOTIFY
- help
- If you want to modify files on branches directly, eg. bypassing aufs,
- and want aufs to detect the changes of them fully, then enable this
- option and use 'udba=inotify' mount option.
- It will have a negative impact to the performance.
- See detail in aufs.5.
- config ADK_KERNEL_AUFS_EXPORT
- bool "NFS-exportable aufs"
- help
- If you want to export your mounted aufs via NFS, then enable this
- option. There are several requirements for this configuration.
- See detail in aufs.5.
- config ADK_KERNEL_AUFS_SHWH
- bool "Show whiteouts"
- help
- If you want to make the whiteouts in aufs visible, then enable
- this option and specify 'shwh' mount option. Although it may
- sounds like philosophy or something, but in technically it
- simply shows the name of whiteout with keeping its behaviour.
- config ADK_KERNEL_AUFS_BR_RAMFS
- bool "Ramfs (initramfs/rootfs) as an aufs branch"
- help
- If you want to use ramfs as an aufs branch fs, then enable this
- Generally tmpfs is recommended.
- hibited them to be a branch fs by default, because
- s becomes unusable after switch_root or something
- y. If you sets initramfs as an aufs branch and boot your
- y switch_root, you will meet a problem easily since the
- initramfs may be inaccessible.
- ou are going to use ramfs as an aufs branch fs without
- oot or something, leave it N.
- config ADK_KERNEL_AUFS_BR_FUSE
- bool "Fuse fs as an aufs branch"
- select ADK_KERNEL_AUFS_POLL
- select ADK_KERNEL_FUSE_FS
- help
- If you want to use fuse-based userspace filesystem as an aufs
- branch fs, then enable this option.
- It implements the internal poll(2) operation which is
- implemented by fuse only (curretnly).
- config ADK_KERNEL_AUFS_DEBUG
- bool "Debug aufs"
- help
- Enable this to compile aufs internal debug code.
- It will have a negative impact to the performance.
- endif
- endmenu
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