linux/init
Kirill Smelkov 3a55fb0d9f Tell the world we gave up on pushing CC_OPTIMIZE_FOR_SIZE
In commit 281dc5c5ec ("Give up on pushing CC_OPTIMIZE_FOR_SIZE") we
already changed the actual default value, but the help-text still
suggested 'y'. Fix the help text too, for all the same reasons.

Sadly, -Os keeps on generating some very suboptimal code for certain
cases, to the point where any I$ miss upside is swamped by the downside.
The main ones are:

 - using "rep movsb" for memcpy, even on CPU's where that is
   horrendously bad for performance.

 - not honoring branch prediction information, so any I$ footprint you
   win from smaller code, you lose from less code density in the I$.

 - using divide instructions when that is very expensive.

Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-16 12:42:57 -08:00
..
calibrate.c init: check printed flag to skip printing message 2012-03-23 16:58:38 -07:00
do_mounts_initrd.c don't bother with kernel_thread/kernel_execve for launching linuxrc 2012-10-11 21:40:30 -04:00
do_mounts_md.c init: disable sparse checking of the mount.o source files 2012-05-31 17:49:27 -07:00
do_mounts_rd.c init: disable sparse checking of the mount.o source files 2012-05-31 17:49:27 -07:00
do_mounts.c block: partition: msdos: provide UUIDs for partitions 2012-11-23 14:28:58 +01:00
do_mounts.h md: move lots of #include lines out of .h files and into .c 2009-03-31 14:33:13 +11:00
init_task.c init_task: Create generic init_task instance 2012-05-05 13:00:21 +02:00
initramfs.c init: disable sparse checking of the mount.o source files 2012-05-31 17:49:27 -07:00
Kconfig Tell the world we gave up on pushing CC_OPTIMIZE_FOR_SIZE 2013-01-16 12:42:57 -08:00
main.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-12-20 18:05:28 -08:00
Makefile init_task: Replace CONFIG_HAVE_GENERIC_INIT_TASK 2012-05-05 13:00:46 +02:00
noinitramfs.c init: mark __user address space on string literals 2010-10-26 16:52:15 -07:00
version.c proc: Usable inode numbers for the namespace file descriptors. 2012-11-20 04:19:49 -08:00