linux-kernel - Re: [PATCH v2 2/2] selftests/liveupdate: add end to end test infrastructure and scripts

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Message-ID: <aYjVkb8qOA6yHDA7@kernel.org>
Date: Sun, 8 Feb 2026 20:27:29 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Jordan Richards <jordanrichards@...gle.com>
Cc: Pasha Tatashin <pasha.tatashin@...een.com>,
	Pratyush Yadav <pratyush@...nel.org>, Shuah Khan <shuah@...nel.org>,
	Jason Miu <jasonmiu@...gle.com>,
	David Matlack <dmatlack@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v2 2/2] selftests/liveupdate: add end to end test
 infrastructure and scripts

Hi Jordan,

On Thu, Feb 05, 2026 at 10:23:29PM +0000, Jordan Richards wrote:
> From: Pasha Tatashin <pasha.tatashin@...een.com>
> 
> Add the end to end testing infrastructure required to verify the
> liveupdate feature. This includes a custom init process, a test
> orchestration script, and a batch runner.
> 
> The framework consists of:
> 
> init.c:
> A lightweight init process that manages the kexec lifecycle.
> It mounts necessary filesystems, determines the current execution
> stage (1 or 2) via the kernel command line, and handles the
> kexec_file_load() sequence to transition between kernels.
> 
> luo_test.sh:
> The primary KTAP-compliant test driver. It handles:
> - Kernel configuration merging and building.
> - Cross-compilation detection for x86_64 and arm64.
> - Generation of the initrd containing the test binary and init.
> - QEMU execution with automatic accelerator detection (KVM, HVF,
>  or TCG).
> 
> run.sh:
> A wrapper script to discover and execute all `luo_*.c`
> tests across supported architectures, providing a summary of
> pass/fail/skip results.
> 
> Signed-off-by: Pasha Tatashin <pasha.tatashin@...een.com>

I think you also need 
Co-developed-by: Jordan Richards <jordanrichards@...gle.com>

> Signed-off-by: Jordan Richards <jordanrichards@...gle.com>

With nolibc fixes Thomas requested:

Reviewed-by: Mike Rapoport (Microsoft) <rppt@...nel.org>

-- 
Sincerely yours,
Mike.