linux-kernel - [PATCH RFC 0/3] selftests/nolibc: avoid spurious kernel relinks

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Message-Id: <20230916-nolibc-initramfs-v1-0-4416ecedca6d@weissschuh.net>
Date:   Sat, 16 Sep 2023 09:13:26 +0200
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>, Willy Tarreau <w@....eu>,
        Shuah Khan <shuah@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH RFC 0/3] selftests/nolibc: avoid spurious kernel relinks

Currently the nolibc testsuite embeds the test executable into a kernel
image with CONFIG_INITRAMFS_SOURCE.
This forces a full kernel relink everytime the test executable is
updated.

This relinking step dominates the test cycle.
It is slower than building and running the test in qemu together.

With a bit of Makefile-shuffling the relinking can be avoided.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
Thomas Weißschuh (3):
      kbuild: add toplevel target for usr/gen_init_cpio
      selftests/nolibc: don't embed initramfs into kernel image
      selftests/nolibc: drop target "rerun"

 Makefile                                |  4 +++
 tools/testing/selftests/nolibc/Makefile | 50 +++++++++++++++------------------
 2 files changed, 27 insertions(+), 27 deletions(-)
---
base-commit: 3f79a57865b33f49fdae6655510bd27c8e6610e0
change-id: 20230916-nolibc-initramfs-4fd00eac3256

Best regards,
-- 
Thomas Weißschuh <linux@...ssschuh.net>