On Tue, 5 Mar 2013 20:47:34 +0900 Kyungsik Lee <kyungsik.lee@xxxxxxx> wrote: > This patch integrates the LZ4 decompression code to the arm pre-boot code. > And it depends on two patchs below > > lib: Add support for LZ4-compressed kernel > decompressor: Add LZ4 decompressor module > > ... > > - Apply CFLAGS, -Os to decompress.o to improve decompress > performance during boot-up process > > ... > > --- a/arch/arm/boot/compressed/Makefile > +++ b/arch/arm/boot/compressed/Makefile > @@ -24,6 +24,9 @@ endif > AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET) > HEAD = head.o > OBJS += misc.o decompress.o > +ifeq ($(CONFIG_KERNEL_LZ4),y) > +CFLAGS_decompress.o := -Os > +endif Surprised. You found that -Os produces faster code than -O2? Details, please? -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
