Re: [PATCH v2 1/2] Provide in-kernel headers for making it easy to extend the kernel

On Tue, Feb 19, 2019 at 01:14:11PM +0900, Masahiro Yamada wrote:

I was able to compile it in-tree but it makes the incremental build extremely slow.

(Here, the incremental build means "make" without changing any code after the full build.)

Before this patch, "make -j8" took 11 sec on my machine.

After this patch, x86_64_defconfig + CONFIG_IKHEADERS_PROC=y takes 53 sec for me since kernel/kheaders_data.txz is regenerated every time even when you did not touch any source file.

We should take time for careful review and test.

Please give me more time for thorough review.

Thanks for taking a look. All are very valid points. Incremental build is must have.