linux-kernel - Re: [PATCH 00/14] sched: Support shared runqueue locking

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Message-ID: <20250911143000.GT4068168@noisy.programming.kicks-ass.net>
Date: Thu, 11 Sep 2025 16:30:00 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Andrea Righi <arighi@...dia.com>
Cc: tj@...nel.org, linux-kernel@...r.kernel.org, mingo@...hat.com,
	juri.lelli@...hat.com, vincent.guittot@...aro.org,
	dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
	mgorman@...e.de, vschneid@...hat.com, longman@...hat.com,
	hannes@...xchg.org, mkoutny@...e.com, void@...ifault.com,
	changwoo@...lia.com, cgroups@...r.kernel.org,
	sched-ext@...ts.linux.dev, liuwenfang@...or.com, tglx@...utronix.de
Subject: Re: [PATCH 00/14] sched: Support shared runqueue locking

On Thu, Sep 11, 2025 at 04:00:22PM +0200, Peter Zijlstra wrote:
> On Wed, Sep 10, 2025 at 07:32:12PM +0200, Andrea Righi wrote:
> 
> > Reproducer:
> > 
> >  $ cd tools/sched_ext
> >  $ make scx_simple
> 
> FWIW, I only have one machine where this works. Most of my machines this
> results in an endless stream of build fail; same for the selftest stuff.
> 
> No clues given, just endless build fail :-(

Ah, I need to do: make O=/build-path/. The one machine it worked on had
an actual test kernel installed and booted.