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 6DB961EA90; Thu, 3 Oct 2024 08:40:47 +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=1727944851; cv=none; b=fXjkmoWLtGvPHdqya9SMQ/WlYR+YE4+yyZ1byWdyoCJg0+Ule/xSo1gkdkC0NcG2lFhkQT8HMCAcpoo0dyif6dDuac66wcHW6+Pv2sTkznxISC/BEsYDAy/s/xUoSVO9InN2i4bW9eQe/yZEIq3Ea6ZK/azoHqQ9Iu1pWZYaP6Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727944851; c=relaxed/simple; bh=ozsTHHN1tQdq3DPq/PBbkyMzuqXkRqtMPzkWQLhoMjM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=oACSS5XSamg+axEg23TB+3F7qEp/A8D20XZAtjYDwbvR2vYq+fJzKxqC5U2C2sbuJiHobjdJJsbO+nmjNdSayilH0IAAYVB6acSbLQj6WedzXPr9h4DXZQ2PsLGw5md/EjOe0yUtkCOVDTZAvSHw/sYouhxOK464KFlKxFsCkdU= 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=V13xVqOL; 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="V13xVqOL" 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=FKE4OTThlFnQ8/AKf3q8EqzQ1CuTSy2Zta7/0vgbdCU=; b=V13xVqOLZd8Pd2cXJZ/Np8XGPt O46djXot3BfPSvLA3GyJbIPWCWI3AA4NDRaL+SFZxZ791mjebRwuDvvsigog0MyRpFZC3lDC5+l4H qgEBORIDMgHPx1N3f6AbRB/gbQWVg8HhOawO/iPUM00pDiFQuDuMXpHhtyL5lez5rIqsDO1XmHiKf syXToKChjiIAAKirDpyZfpjS0XLYBu8HzW/wL4pPKPJZrIbmuVxvxN5mBuKUcg+0sDCp4V0CJn0As q2dCvELrLTad00T53N/ybtDCS57Sn0g1D2rLPyoMVnNv1Ru3BnL8T1mTXS4JJuZ2d67oha6sq429/ z62qsg0g==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1swHO4-00000007P4v-018V; Thu, 03 Oct 2024 08:40:40 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 7462B30083E; Thu, 3 Oct 2024 10:40:39 +0200 (CEST) Date: Thu, 3 Oct 2024 10:40:39 +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: <20241003084039.GS5594@noisy.programming.kicks-ass.net> References: 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: 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?