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Expose "Optimize for size" option for everybody

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Let's put my money where my mouth is.  Smaller code is almost always
faster, if only because a single I$ miss ends up leaving a lot of cycles
to make up for.  And system software - kernels in particular - are known
for taking more cache misses than most other kinds.

On my random config, this made the kernel about 10% smaller, and lmbench
seems to say that it's pretty uniformly faster too. Your milage may vary.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Linus Torvalds 2005-12-13 11:39:05 -08:00
parent 83bab9a4bb
commit 0910b444bc
1 changed files with 1 additions and 1 deletions
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init/Kconfig
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@ -339,7 +339,7 @@ config EPOLL
support for epoll family of system calls. support for epoll family of system calls.
config CC_OPTIMIZE_FOR_SIZE config CC_OPTIMIZE_FOR_SIZE
bool "Optimize for size" if EMBEDDED bool "Optimize for size"
default y if ARM || H8300 default y if ARM || H8300
help help
Enabling this option will pass "-Os" instead of "-O2" to gcc Enabling this option will pass "-Os" instead of "-O2" to gcc