linux-kernel - Re: selftests/sched_ext: testing on BPF CI

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Message-ID: <0a039ded-b67d-4a0c-a851-e3aafff57321@linux.dev>
Date: Fri, 2 May 2025 14:40:45 -0700
From: Ihor Solodrai <ihor.solodrai@...ux.dev>
To: Tejun Heo <tj@...nel.org>, Andrea Righi <arighi@...dia.com>,
 Changwoo Min <changwoo@...lia.com>, Alexei Starovoitov <ast@...nel.org>
Cc: bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: selftests/sched_ext: testing on BPF CI

On 2025-01-28 4:21 p.m., Ihor Solodrai wrote:
> Hi Tejun, Andrea.
> 
> I tested a couple of variants of bpf-next + sched_ext source tree,
> just sharing the results.
> 
> I found a working state: BPF CI pipeline ran successfully twice
> (that's 8 build + run of selftests/sched_ext/runner in total).
> 
> Working state requires most patches between sched_ext/master and
> sched_ext/for-6.14-fixes [1], and also the patch
>    "tools/sched_ext: Receive updates from SCX repo" [2]
> 
> On plain bpf-next the dsp_local_on test fails [3].
> Without the patch [2] there is a build error [4]: missing
> SCX_ENUM_INIT definition.
> 
> We probably don't want to enable selftests/sched_ext on BPF CI with
> that many "temporary" patches. I suggest to wait until all of this is
> merged upstream.
> 

Hi everyone. I tried enabling sched_ext selftests on CI today, and there
are no issues on bpf-next tip (f263336a41da).

https://github.com/kernel-patches/vmtest/actions/runs/14802453691

If there are no objections, I'm going to push this to BPF CI on Monday.

As a reminder, this means that selftests/sched_ext test runner will be 
built and executed for pending BPF patches, and BPF CI pipeline will 
fail in case of problems there.

> You can check the full list of patches here:
> https://github.com/kernel-patches/vmtest/pull/332/files
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext.git/log/?h=for-6.14-fixes
> [2] https://lore.kernel.org/all/Z1ucTqJP8IeIXZql@slm.duckdns.org/
> [3] https://github.com/kernel-patches/vmtest/actions/runs/13019837022
> [4] https://github.com/kernel-patches/vmtest/actions/runs/13020458479