menuconfig FS_SQUASHFS bool prompt "squashfs support" help Saying Y here includes support for SquashFS 4.0 (a Compressed Read-Only File System). Squashfs is a highly compressed read-only filesystem for Linux. It uses zlib, lzo or xz compression to compress both files, inodes and directories. Inodes in the system are very small and all blocks are packed to minimise data overhead. Block sizes greater than 4K are supported up to a maximum of 1 Mbytes (default block size 128K). SquashFS 4.0 supports 64 bit filesystems and files (larger than 4GB), full uid/gid information, hard links and timestamps. Squashfs is intended for general read-only filesystem use, for archival use (i.e. in cases where a .tar.gz file may be used), and in embedded systems where low overhead is needed. Further information and tools are available from http://squashfs.sourceforge.net. config SQUASHFS_XZ bool "Include support for XZ compressed file systems" default y depends on FS_SQUASHFS select XZ_DECOMPRESS help Saying Y here includes support for reading Squashfs file systems compressed with XZ compression. XZ gives better compression than the default zlib compression, at the expense of greater CPU and memory overhead. XZ is not the standard compression used in Squashfs and so most file systems will be readable without selecting this option.