linux-kernel - [4.9-rc1] Build-time 2x slower

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Date:   Mon, 17 Oct 2016 18:04:49 +0200
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: [4.9-rc1] Build-time 2x slower

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.

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

Download attachment "for-linus.tar.gz" of type "application/x-gzip" (99514 bytes)

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