From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 F051C482ED; Thu, 3 Oct 2024 08:47:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727945275; cv=none; b=QO7dRB1TviA3hvISt24dBneEef0M5QmbK1HyWPdxlLni5EhpvEsY9IUdKM47HS4R4KXjtmY+rkhTLp0i53yolszD5Sca1EueHgN2Und4SzWQvx+CeN3qZsYQlRrR25nWnMnNT9WfPMzWG7CRre6cfqeGRQ3pkBxgC6Vp6/U98CU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727945275; c=relaxed/simple; bh=NFiEVfncwlZrl8/o+O8TpVCGpp2sMmTX/y+pFR+apCw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=YYKX28rG779RDmV8Jpzo4z6SNbUZ2FtGB5T4tmi91oZqfq4WBftoxLf5OVhh6MujeNlq/sy0BBAyqCQ5UrJBcERl+ukoS4xMztAdl8ZFDXP9swNfe45/k7ynT5mybHkX6U6aTcr5cwx/RbiGkLlhXZsNwn1a1kXwFEKRoQP/BPo= 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=BmWsw31/; arc=none smtp.client-ip=90.155.92.199 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="BmWsw31/" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; 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=JxpVfVshi8ln9iQvUep2RQ1oDNl0ObuPgd4eUfVRQMQ=; b=BmWsw31/+Rgv9gXtydqbMXfbuJ FbwlNY+kkOAz5yyZ2IroIwABeQsOebExpuUTNIokUQVOY/Odx8nOxZXbHhmnn17c6n9ggUWBKG6KZ /KoysLnY0FhQE5j0goWfANoZTyBaAHuDzAtaXKw8R1xRsq0lQcG7qFdtDC3cHntXlradoDJK0zbS5 FMjTwuU5f5S2Do368Y3M36UoFmA7dAJM2woBSO+8AmSs2gv2VNO4vOOoWAq9ahD1sQvVctB5gLcsP D/XjDh4YJgZLQN68ZoqerwfGnyV8o2YhaDafLoF87ppcN4xeyT7zapHc8xA4v6rYYgo3yZRjeb9gw CBnQYMBA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1swHUu-00000003ewe-1gyM; Thu, 03 Oct 2024 08:47:44 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 6B93E30083E; Thu, 3 Oct 2024 10:47:43 +0200 (CEST) Date: Thu, 3 Oct 2024 10:47:43 +0200 From: Peter Zijlstra To: "Paul E. McKenney" Cc: vschneid@redhat.com, linux-kernel@vger.kernel.org, sfr@canb.auug.org.au, linux-next@vger.kernel.org, kernel-team@meta.com Subject: Re: [BUG almost bisected] Splat in dequeue_rt_stack() and build error Message-ID: <20241003084743.GC33184@noisy.programming.kicks-ass.net> References: <20241003084039.GS5594@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: linux-next@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: <20241003084039.GS5594@noisy.programming.kicks-ass.net> On Thu, Oct 03, 2024 at 10:40:39AM +0200, Peter Zijlstra wrote: > On Wed, Aug 21, 2024 at 02:57:16PM -0700, Paul E. McKenney wrote: > > > My reproducer on the two-socket 40-core 80-HW-thread systems is: > > > > tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 1m --configs "50*TREE03" --trust-make > > > > This gets me a very long stream of: > > Results directory: /usr/src/linux-rcu/tools/testing/selftests/rcutorture/res/2024.10.03-09.30.33 > tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 1m --configs 50*TREE03 --trust-make > TREE03 ------- > QEMU error, output: > cat: /usr/src/linux-rcu/tools/testing/selftests/rcutorture/res/2024.10.03-09.30.33/TREE03/qemu-output: No such file or directory > TREE03.10 ------- > QEMU error, output: > cat: /usr/src/linux-rcu/tools/testing/selftests/rcutorture/res/2024.10.03-09.30.33/TREE03.10/qemu-output: No such file or directory > ... > > > Did I not do it right? Urgh, for some reason my machine doesn't auto load kvm_intel.ko and then proceeds to not do anything useful.. Let me try again.