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authorPhillip Lougher <phillip@lougher.demon.co.uk>2009-01-05 08:46:28 +0000
committerPhillip Lougher <phillip@lougher.demon.co.uk>2009-01-05 08:46:28 +0000
commit6ab5c1ca71ea8e04e97cd8ed473bd04e636850fd (patch)
treecdc6fc1dc2bccccedd02720467c69f4a7bbda489
parentfcef6fb6c5cf54927e1ca86b86a991e7aa9391f5 (diff)
downloadvexpress-lsk-6ab5c1ca71ea8e04e97cd8ed473bd04e636850fd.tar.gz
Squashfs: Kconfig entry
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
-rw-r--r--fs/Kconfig52
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/Kconfig b/fs/Kconfig
index ff0e8198020..2553e0bbd01 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -894,6 +894,58 @@ config CRAMFS
If unsure, say N.
+config SQUASHFS
+ tristate "SquashFS 4.0 - Squashed file system support"
+ depends on BLOCK
+ select ZLIB_INFLATE
+ 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 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.
+
+ If you want to compile this as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want),
+ say M here and read <file:Documentation/modules.txt>. The module
+ will be called squashfs. Note that the root file system (the one
+ containing the directory /) cannot be compiled as a module.
+
+ If unsure, say N.
+
+config SQUASHFS_EMBEDDED
+
+ bool "Additional option for memory-constrained systems"
+ depends on SQUASHFS
+ default n
+ help
+ Saying Y here allows you to specify cache size.
+
+ If unsure, say N.
+
+config SQUASHFS_FRAGMENT_CACHE_SIZE
+ int "Number of fragments cached" if SQUASHFS_EMBEDDED
+ depends on SQUASHFS
+ default "3"
+ help
+ By default SquashFS caches the last 3 fragments read from
+ the filesystem. Increasing this amount may mean SquashFS
+ has to re-read fragments less often from disk, at the expense
+ of extra system memory. Decreasing this amount will mean
+ SquashFS uses less memory at the expense of extra reads from disk.
+
+ Note there must be at least one cached fragment. Anything
+ much more than three will probably not make much difference.
+
config VXFS_FS
tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
depends on BLOCK