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.