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CONFIG_EROFS_FS: EROFS filesystem support

General informations

The Linux kernel configuration item CONFIG_EROFS_FS has multiple definitions:

EROFS filesystem support found in fs/erofs/Kconfig

The configuration item CONFIG_EROFS_FS:

Help text

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.

EROFS filesystem support found in drivers/staging/erofs/Kconfig

The configuration item CONFIG_EROFS_FS:

Help text

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.

Hardware

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