On Tue, Oct 18, 2016 at 12:04 AM, Sedat Dilek <sedat.di...@gmail.com> wrote: > Hi Linus, > > not sure whom to address on this issue. > > I have built Linux v4.9-rc1, v4.8.2 and v4.4.25 kernels (in this > order) this morning. > > Building a Linux v4.8.2 under Linux v4.9-rc1 took two times longer. > > As usually I build with 2 parallel-make-jobs. > This takes approx. 30mins. > Under Linux v4.9-rc1 it took approx. an hour. > > My system is a Ubuntu/precise AMD64 (WUBI installation). > I use my normal build-environment. > > If you need further informations, please let me know.
Kernel building is more like a CPU-bound workload, so maybe some clues can be got by comparing results of 'perf top/record', which should be very easy to collect. > > Regards, > - Sedat - > > P.S.: Listing content of attached tarball file. > > $ LC_ALL=C ls -R > .: > build-time configs scripts toolchain-amd64 > > ./build-time: > ls-alt_building-4-4-25-under-4-8-2.txt > ls-alt_building-4-8-2-under-4-9-0-rc1.txt > > ./configs: > WHATS-IN-DILEKS-LINUX-KERNEL.txt config-4.4.25-1-iniza-small > config-4.8.2-1-iniza-small config-4.9.0-rc1-1-iniza-small > > ./scripts: > build_linux-upstream.sh > > ./toolchain-amd64: > HOST-AND-BUILD-TOOLCHAIN.txt Thanks, Ming Lei
