Hi, On 18 January 2018 at 10:50, Koen Vandeputte <koen.vandepu...@ncentric.com> wrote: > A lot of targets have more than sufficient space to allow > building the kernel for speed iso size. > > Export this performance option to the main config: > > - Making it easy accessable for users > - Discarding the need to adjust it in the kernel config each time > when building from scratch and only using "make oldconfig" > > Compiling for size is still the default.
This would be a "regression" for layerscape, as this target sets CC_OPTIMIZE_FOR_PERFORMANCE to y. > > Purely informational: > > On my cns3xxx board, kernel size increases by ~100kB > but boot time decreased by ~8%. > > Signed-off-by: Koen Vandeputte <koen.vandepu...@ncentric.com> > --- > config/Config-kernel.in | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > > diff --git a/config/Config-kernel.in b/config/Config-kernel.in > index fa06b5044219..b98c5dd04591 100644 > --- a/config/Config-kernel.in > +++ b/config/Config-kernel.in > @@ -194,6 +194,22 @@ config KERNEL_DEBUG_GPIO > bool "Compile the kernel with gpio debugging" > select KERNEL_DEBUG_KERNEL > > +config KERNEL_CC_OPTIMIZE_FOR_PERFORMANCE > + bool > + default y if COMPILE_KERNEL_FOR_SPEED > + default n > + > +config KERNEL_CC_OPTIMIZE_FOR_SIZE > + bool > + default n if COMPILE_KERNEL_FOR_SPEED > + default y > + > +config COMPILE_KERNEL_FOR_SPEED > + bool "Optimize the kernel for speed instead of size" > + default n > + help > + This will compile your kernel for maximum speed (-O2) instead of > smaller size (-Os) The kernel uses a choice here, so I think it would be better to just copy that. One less config option as well. Also the options should be removed from the kernel configs then. Regards Jonas _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
