diff options
| author | Josh Triplett <josh@joshtriplett.org> | 2014-08-17 19:41:09 -0500 |
|---|---|---|
| committer | Josh Triplett <josh@joshtriplett.org> | 2014-08-17 19:44:24 -0500 |
| commit | d3ac21cacc24790eb45d735769f35753f5b56ceb (patch) | |
| tree | 7cef2d5f86c0704b50cc163197ca4f6342c45c61 /init | |
| parent | 7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9 (diff) | |
| download | lwn-d3ac21cacc24790eb45d735769f35753f5b56ceb.tar.gz lwn-d3ac21cacc24790eb45d735769f35753f5b56ceb.zip | |
mm: Support compiling out madvise and fadvise
Many embedded systems will not need these syscalls, and omitting them
saves space. Add a new EXPERT config option CONFIG_ADVISE_SYSCALLS
(default y) to support compiling them out.
bloat-o-meter:
add/remove: 0/3 grow/shrink: 0/0 up/down: 0/-2250 (-2250)
function old new delta
sys_fadvise64 57 - -57
sys_fadvise64_64 691 - -691
sys_madvise 1502 - -1502
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig index e84c6423a2e5..782a65bf76ea 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1537,6 +1537,16 @@ config AIO by some high performance threaded applications. Disabling this option saves about 7k. +config ADVISE_SYSCALLS + bool "Enable madvise/fadvise syscalls" if EXPERT + default y + help + This option enables the madvise and fadvise syscalls, used by + applications to advise the kernel about their future memory or file + usage, improving performance. If building an embedded system where no + applications use these syscalls, you can disable this option to save + space. + config PCI_QUIRKS default y bool "Enable PCI quirk workarounds" if EXPERT |