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SubjectRe: [PATCH][2.6] Completely out of line spinlocks / i386
On Thu, Aug 12, 2004 at 12:20:58AM -0700, William Lee Irwin III wrote:
> Okay, the results on 2.6.8-rc4 (COOL had a bit of porting, basically
> dropping the hunks associated with spin_lock_flags_string or whatever
> it is). Chose the .config largely to be vaguely deterministic, but had
> to nuke the "System is too big" check in arch/x86_64/boot/tools/build.c.
> text data bss dec hex filename
> mainline: 20708323 6603052 1878448 29189823 1bd66bf vmlinux
> cool: 20619594 6588166 1878448 29086208 1bbd200 vmlinux
> C-func: 19969264 6583128 1878384 28430776 1b1d1b8 vmlinux
> x86-64, -O2, allyesconfig minus the following:
[...]

Most of this is consolidating preempt_count()++ and preempt_count()--
when CONFIG_PREEMPT=y. Removing CONFIG_PREEMPT from the .config yields:

text data bss dec hex filename
mainline: 19973522 6607761 1878448 28459731 1b242d3 vmlinux
cool: 19839487 6585707 1878448 28303642 1afe11a vmlinux
C-func: 19923848 6582771 1878384 28385003 1b11eeb vmlinux


-- wli
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