linux-kernel - Re: [PATCH v2] selftests: sched_ext: Add sched

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Message-ID: <ZwRA6P3YZ42JjVk9@finisterre.sirena.org.uk>
Date: Mon, 7 Oct 2024 21:13:28 +0100
From: Mark Brown <broonie@...nel.org>
To: Björn Töpel <bjorn@...nel.org>
Cc: Tejun Heo <tj@...nel.org>, David Vernet <void@...ifault.com>,
	Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Björn Töpel <bjorn@...osinc.com>,
	bpf@...r.kernel.org, linux-riscv@...ts.infradead.org,
	Anders Roxell <anders.roxell@...aro.org>
Subject: Re: [PATCH v2] selftests: sched_ext: Add sched_ext as proper
 selftest target

On Mon, Oct 07, 2024 at 06:00:57PM +0200, Björn Töpel wrote:

> The sched_ext BPF programs relies on a vmlinux.h, which is generated
> using bpftool and the vmlinux with BTF information. Have you built a
> kernel with BTF support?

OK, so having beaten the kernel config into shape and using GCC rather
than clang for my build I did get this to build fine.  I think the main
gotchas are the issues with the arm64 defconfig not supporting BTF and
the fact that the Makefile silently picked up the host kernel.

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