From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3F27633A03D; Thu, 11 Sep 2025 14:30:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757601014; cv=none; b=tCJSxKbYKffCnaKYXWauSGDL6nCPKg8sBj/gLaQIoV0M2014xNxY+dcq+FgEc+qFYswa82eXDeNS9LrRgkQkxkjCwdBVdsqd9T1sOxPP+kza0XLfrrKZyXUOgOy+DPqyX/muVGDMX5MKW3hSH/qboSvto12edeWyN3e9X9nceFs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757601014; c=relaxed/simple; bh=+nuHJJgA1UZzmSSrRpr9RqIkTonjYqdsreUt0Fvixjs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ZpkKDFGAu5g4WbvWgEtqWHBz6FwH4FEgrePz1bp7Tna+7XatGrin6DemUEJQRpqSBGKV8kbvQpuGA7DFaw2Iab244uBLlBIv4/hHwLXGk97b8gYnpPpP3MN8Ma03wjagEWY30ZUePU8cAmR3V6UsESPQqbRSLBk+AhmIf+B/H1c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=odYy6zC8; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="odYy6zC8" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=0Lz8ZDk2B2FZe4fQIDBwLWIa5BFq5+bd/klhhnDYKyU=; b=odYy6zC8sXQ8uabmcdh6Rv/K12 OxB1NSuHhiZVI1dQ8pYWV4X7PkDYEHVv6WgMZVa0pIrTmDgZzng7yP6t0ixe2h1418XoMVYjASK1o 3U4HwUXP2eWQ+hvqDjkpnElX18KNxQZRmkgL0L1cueTxutUbDSKq6M9dN95F290ME1Tgv60NhRT/t 34Z2G0I2KM22JLTDIcJhojzCCN5W+5jHBpbhhUHeHUJRpxUoWx+i63B79zHqXaqazoG44/fzvf55d +RanpJJj8IUkINYQ5GoYn22aamFoEIwWUCVpX75LHpqCMqZi89+NbDjbrZOPQ2KRhI/sacJKcTtQ8 AkMVC0Ew==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1uwiJF-0000000CWZe-2B6f; Thu, 11 Sep 2025 14:30:01 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 299DF300579; Thu, 11 Sep 2025 16:30:00 +0200 (CEST) Date: Thu, 11 Sep 2025 16:30:00 +0200 From: Peter Zijlstra To: Andrea Righi Cc: tj@kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, longman@redhat.com, hannes@cmpxchg.org, mkoutny@suse.com, void@manifault.com, changwoo@igalia.com, cgroups@vger.kernel.org, sched-ext@lists.linux.dev, liuwenfang@honor.com, tglx@linutronix.de Subject: Re: [PATCH 00/14] sched: Support shared runqueue locking Message-ID: <20250911143000.GT4068168@noisy.programming.kicks-ass.net> References: <20250910154409.446470175@infradead.org> <20250911140022.GP4067720@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250911140022.GP4067720@noisy.programming.kicks-ass.net> 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.