Revision eca9dfcd0029c8a84b1094bb84a2fb53e4addf6c authored by Linus Torvalds on 19 December 2009, 17:48:42 UTC, committed by Linus Torvalds on 19 December 2009, 17:48:42 UTC
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf session: Make events_stats u64 to avoid overflow on 32-bit arches hw-breakpoints: Fix hardware breakpoints -> perf events dependency perf events: Dont report side-band events on each cpu for per-task-per-cpu events perf events, x86/stacktrace: Fix performance/softlockup by providing a special frame pointer-only stack walker perf events, x86/stacktrace: Make stack walking optional perf events: Remove unused perf_counter.h header file perf probe: Check new event name kprobe-tracer: Check new event/group name perf probe: Check whether debugfs path is correct perf probe: Fix libdwarf include path for Debian
Kconfig
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.
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