x86: Allow disabling HW_BREAKPOINTS, PERF_EVENTS, INSTRUCTION_DECODER, IRQ_WORK
Make HW_BREAKPOINTS a config option. HW_BREAKPOINTS depends on perf.
This allows disabling PERF_EVENTS for systems that don't need it (e.g.
anything not used for development) This then allows disabling IRQ_WORK
and INSTRUCTION_DECODER.
This change reduces the size of allnoconfig by 161k, a full 7.6%
reduction:
text data bss dec hex filename
788816 131952 1214432 2135200 2094a0 vmlinux-allnoconfig-with-perf
666361 93020 1214368 1973749 1e1df5 vmlinux-allnoconfig-no-perf
bloat-o-meter summary:
add/remove: 1/1040 grow/shrink: 1/25 up/down: 82/-152214 (-152132)
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
[josh: Rebased; HW_BREAKPOINTS marked as EXPERT; commit message updated
with new statistics.]
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
3 files changed
