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

[Alexei Starovoitov]

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.