diff options
| author | Josh Triplett <josh@joshtriplett.org> | 2014-08-08 16:25:47 -0700 |
|---|---|---|
| committer | Josh Triplett <josh@joshtriplett.org> | 2014-08-08 16:30:24 -0700 |
| commit | 0da1d4a0b9516adb2acc4841e9f6da6618f47f4e (patch) | |
| tree | 7542ef60dd821bf6aba92a5e747b7e0980f25504 | |
| parent | 3aaefce10351fecab348f5e06857f44cafc61a62 (diff) | |
x86: Add "make tinyconfig" to configure the tiniest possible kernel
Since commit 5d2acfc7b974bbd3858b4dd3f2cdc6362dd8843a ("kconfig: make
allnoconfig disable options behind EMBEDDED and EXPERT") in 3.15-rc1,
"make allnoconfig" disables every possible config option.
However, a few configuration options (CC_OPTIMIZE_FOR_SIZE,
OPTIMIZE_INLINING) produce a smaller kernel when turned on, and a few
choices exist (compression, highmem, allocator) for which a non-default
option produces a smaller kernel.
Add a "tinyconfig" option, which starts from allnoconfig and then sets
these options to configure the tiniest possible kernel. This provides a
better baseline for embedded systems or efforts to reduce kernel size.
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
| -rw-r--r-- | arch/x86/configs/tiny.config | 1 | ||||
| -rw-r--r-- | kernel/configs/tiny.config | 4 | ||||
| -rw-r--r-- | scripts/kconfig/Makefile | 5 |
3 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/configs/tiny.config b/arch/x86/configs/tiny.config new file mode 100644 index 000000000000..4e2ecfa23c15 --- /dev/null +++ b/arch/x86/configs/tiny.config @@ -0,0 +1 @@ +CONFIG_NOHIGHMEM=y diff --git a/kernel/configs/tiny.config b/kernel/configs/tiny.config new file mode 100644 index 000000000000..c2de56ab0fce --- /dev/null +++ b/kernel/configs/tiny.config @@ -0,0 +1,4 @@ +CONFIG_CC_OPTIMIZE_FOR_SIZE=y +CONFIG_KERNEL_XZ=y +CONFIG_OPTIMIZE_INLINING=y +CONFIG_SLOB=y diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile index 8083b94b45ee..ebf40f6edb4d 100644 --- a/scripts/kconfig/Makefile +++ b/scripts/kconfig/Makefile @@ -117,6 +117,10 @@ PHONY += kvmconfig kvmconfig: $(call mergeconfig,kvm_guest) +PHONY += tinyconfig +tinyconfig: allnoconfig + $(call mergeconfig,tiny) + # Help text used by make help help: @echo ' config - Update current config utilising a line-oriented program' @@ -138,6 +142,7 @@ help: @echo ' listnewconfig - List new options' @echo ' olddefconfig - Same as silentoldconfig but sets new symbols to their default value' @echo ' kvmconfig - Enable additional options for guest kernel support' + @echo ' tinyconfig - Configure the tiniest possible kernel' # lxdialog stuff check-lxdialog := $(srctree)/$(src)/lxdialog/check-lxdialog.sh |