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The Linux kernel configuration item CONFIG_EROFS_FS
has multiple definitions:
fs/erofs/Kconfig
The configuration item CONFIG_EROFS_FS:
CONFIG_BLOCK
erofs
, erofs
EROFS (Enhanced Read-Only File System) is a lightweight read-only file system with modern designs (e.g. no buffer heads, inline xattrs/data, chunk-based deduplication, multiple devices, etc.) for scenarios which need high-performance read-only solutions, e.g. smartphones with Android OS, LiveCDs and high-density hosts with numerous containers;
It also provides fixed-sized output compression support in order to improve storage density as well as keep relatively higher compression ratios and implements in-place decompression to reuse the file page for compressed data temporarily with proper strategies, which is quite useful to ensure guaranteed end-to-end runtime decompression performance under extremely memory pressure without extra cost.
See the documentation at Documentation/filesystems/erofs.rst and the web pages at https://erofs.docs.kernel.org for more details.
If unsure, say N.
drivers/staging/erofs/Kconfig
The configuration item CONFIG_EROFS_FS:
CONFIG_BLOCK
erofs
, erofs
EROFS(Enhanced Read-Only File System) is a lightweight read-only file system with modern designs (eg. page-sized blocks, inline xattrs/data, etc.) for scenarios which need high-performance read-only requirements, eg. firmwares in mobile phone or LIVECDs.
It also provides VLE compression support, focusing on random read improvements, keeping relatively lower compression ratios, which is useful for high-performance devices with limited memory and ROM space.
If unsure, say N.
Raw data from LKDDb:
lkddb fs "erofs" : CONFIG_EROFS_FS : fs/erofs/super.c # in 5.4–5.19, 6.0–6.10, 6.11-rc+HEAD
lkddb fs "erofs" : CONFIG_EROFS_FS CONFIG_STAGING : drivers/staging/erofs/super.c # in 4.19–4.20, 5.0–5.3
lkddb fs "pseudo_erofs" : CONFIG_EROFS_FS CONFIG_EROFS_FS_ONDEMAND : fs/erofs/fscache.c # in 6.9–6.10, 6.11-rc+HEAD
lkddb module erofs CONFIG_EROFS_FS : drivers/staging/erofs/Kconfig : "EROFS filesystem support" # in 4.19–4.20, 5.0–5.3
lkddb module erofs CONFIG_EROFS_FS : fs/erofs/Kconfig : "EROFS filesystem support" # in 5.4–5.19, 6.0–6.10, 6.11-rc+HEAD
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Automatically generated (in year 2024). See also LKDDb sources on GitLab