linux-kernel - Re: [PATCH sched_ext/for-6.13-fixes] sched_ext: Fix dsq_local

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Message-ID: <Z5BMkyJ8I7cth1GH@slm.duckdns.org>
Date: Tue, 21 Jan 2025 15:40:35 -1000
From: Tejun Heo <tj@...nel.org>
To: Ihor Solodrai <ihor.solodrai@...me>
Cc: sched-ext@...a.com, kernel-team@...a.com, linux-kernel@...r.kernel.org,
	bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH sched_ext/for-6.13-fixes] sched_ext: Fix dsq_local_on
 selftest

Hello, sorry about the delay.

On Wed, Jan 15, 2025 at 11:50:37PM +0000, Ihor Solodrai wrote:
...
>     2025-01-15T23:28:55.8238375Z [    5.334631] sched_ext: BPF scheduler "dsp_local_on" disabled (runtime error)
>     2025-01-15T23:28:55.8243034Z [    5.335420] sched_ext: dsp_local_on: SCX_DSQ_LOCAL[_ON] verdict target cpu 1 not allowed for kworker/u8:1[33]

That's a head scratcher. It's a single node 2 cpu instance and all unbound
kworkers should be allowed on all CPUs. I'll update the test to test the
actual cpumask but can you see whether this failure is consistent or flaky?

Thanks.

-- 
tejun