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| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2008-10-15 22:05:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-16 11:21:51 -0700 |
| commit | ebf3f09c634906d371f2bfd71b41c7e0c52efe7e (patch) | |
| tree | 4205040f47fba2675dc4c6b1407d15c9d6f8b355 /init | |
| parent | d8273674721faaf84bec2190c0c7a82972b37f73 (diff) | |
| download | linux-ebf3f09c634906d371f2bfd71b41c7e0c52efe7e.tar.gz linux-ebf3f09c634906d371f2bfd71b41c7e0c52efe7e.tar.bz2 linux-ebf3f09c634906d371f2bfd71b41c7e0c52efe7e.zip | |
Configure out AIO support
This patchs adds the CONFIG_AIO option which allows to remove support
for asynchronous I/O operations, that are not necessarly used by
applications, particularly on embedded devices. As this is a
size-reduction option, it depends on CONFIG_EMBEDDED. It allows to
save ~7 kilobytes of kernel code/data:
text data bss dec hex filename
1115067 119180 217088 1451335 162547 vmlinux
1108025 119048 217088 1444161 160941 vmlinux.new
-7042 -132 0 -7174 -1C06 +/-
This patch has been originally written by Matt Mackall
<mpm@selenic.com>, and is part of the Linux Tiny project.
[randy.dunlap@oracle.com: build fix]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Zach Brown <zach.brown@oracle.com>
Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig index 8a8e2d00c40e..5ceff3249a2d 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -713,6 +713,14 @@ config SHMEM option replaces shmem and tmpfs with the much simpler ramfs code, which may be appropriate on small systems without swap. +config AIO + bool "Enable AIO support" if EMBEDDED + default y + help + This option enables POSIX asynchronous I/O which may by used + by some high performance threaded applications. Disabling + this option saves about 7k. + config VM_EVENT_COUNTERS default y bool "Enable VM event counters for /proc/vmstat" if EMBEDDED |