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The Linux kernel configuration item CONFIG_CRAMFS has multiple definitions:
fs/cramfs/KconfigThe configuration item CONFIG_CRAMFS:
(none)cramfs, cramfsSaying Y here includes support for CramFs (Compressed ROM File System). CramFs is designed to be a simple, small, and compressed file system for ROM based embedded systems. CramFs is read-only, limited to 256MB file systems (with 16MB files), and doesn't support 16/32 bits uid/gid, hard links and timestamps.
See Documentation/filesystems/cramfs.rst and fs/cramfs/README for further information.
To compile this as a module, choose M here: the module will be called cramfs. Note that the root file system (the one containing the directory /) cannot be compiled as a module.
This filesystem is limited in capabilities and performance on purpose to remain small and low on RAM usage. It is most suitable for small embedded systems. If you have ample RAM to spare, you may consider a more capable compressed filesystem such as SquashFS which is much better in terms of performance and features.
If unsure, say N.
fs/cramfs/KconfigThe configuration item CONFIG_CRAMFS:
CONFIG_BLOCKcramfs, cramfsSaying Y here includes support for CramFs (Compressed ROM File System). CramFs is designed to be a simple, small, and compressed file system for ROM based embedded systems. CramFs is read-only, limited to 256MB file systems (with 16MB files), and doesn't support 16/32 bits uid/gid, hard links and timestamps.
See Documentation/filesystems/cramfs.txt and fs/cramfs/README for further information.
To compile this as a module, choose M here: the module will be called cramfs. Note that the root file system (the one containing the directory /) cannot be compiled as a module.
This filesystem is obsoleted by SquashFS, which is much better in terms of performance and features.
If unsure, say N.
fs/KconfigThe configuration item CONFIG_CRAMFS:
CONFIG_BLOCKcramfs, cramfsSaying Y here includes support for CramFs (Compressed ROM File System). CramFs is designed to be a simple, small, and compressed file system for ROM based embedded systems. CramFs is read-only, limited to 256MB file systems (with 16MB files), and doesn't support 16/32 bits uid/gid, hard links and timestamps.
See Documentation/filesystems/cramfs.txt and fs/cramfs/README for further information.
To compile this as a module, choose M here: the module will be called cramfs. Note that the root file system (the one containing the directory /) cannot be compiled as a module.
If unsure, say N.
fs/KconfigThe configuration item CONFIG_CRAMFS:
(none)cramfs, cramfsSaying Y here includes support for CramFs (Compressed ROM File System). CramFs is designed to be a simple, small, and compressed file system for ROM based embedded systems. CramFs is read-only, limited to 256MB file systems (with 16MB files), and doesn't support 16/32 bits uid/gid, hard links and timestamps.
See Documentation/filesystems/cramfs.txt and fs/cramfs/README for further information.
To compile this as a module, choose M here: the module will be called cramfs. Note that the root file system (the one containing the directory /) cannot be compiled as a module.
If unsure, say N.
Raw data from LKDDb:
lkddb fs "cramfs" : CONFIG_CRAMFS : fs/cramfs/inode.c # in 2.5.45–2.5.75, 2.6.0–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEADlkddb module cramfs CONFIG_CRAMFS : fs/Kconfig : "Compressed ROM file system support (cramfs)" # in 2.5.45–2.5.75, 2.6.0–2.6.28lkddb module cramfs CONFIG_CRAMFS : fs/cramfs/Kconfig : "Compressed ROM file system support (cramfs)" # in 2.6.29–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEADThis page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).
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Automatically generated (in year 2024). See also LKDDb sources on GitLab