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 51C6613D245; Thu, 3 Oct 2024 14:22:48 +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=1727965369; cv=none; b=DWHUHb1TQ6jeCnRjwGFnDl0MFuV2f69nU5amE0mDHE2BRp6/FK58gfj0pg0+SuXU2B6p7/5mgj0YtM5qjcXJnKgiMDvYnYSAEYp6N2GDHHyvxEjbKcp5Z7Oo9KZj/VZcDgsZIus3kZk5BGFPyunciOf9aPgOfXUE2ecbX9qQGQU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727965369; c=relaxed/simple; bh=N+4jLruOY/voPlwgOR8vIkDt22CK5Tu1S+y14Dt2crM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=e/7zVTu9rxx983LAkrjZ7iux1Ytl6UPxhLWxL6roVq6oZFkPmCdOINWIvCNj4OpCnEXRfuHjnWU8yCrdG28u243A54P0fpAAo/6PAe7PQSvJpnU2r8LypWveKsj6T/n4rq+ysESbl5LmPFjgUf4zLuCL9xpL+ZU9fjmkiFw002U= 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=O5H4EyTf; 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="O5H4EyTf" 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=GMQSaEYRKipoUz2TKW6qIhrXIia89gFO/eo4ruiFZvc=; b=O5H4EyTfYA0wkkImHQRoZZS6ZY XgMbP0ROjDCnVnqM7hrSUelCK16tHL3CVpgDjPkrQl7lPwrqa8qRJS8jKVeT+OwnZ16YRDYonAmeq yymJVg1Ip5homJ8JHz9d2pa7HjvnVXZ/EY7UPYaNvvYaCz6SXiAlo2caoXLrM8oPhv2thUEbKitMd lVwmBRC5LX+HBls405UtVqx8cpkIzceR6zQL1MvA7cjWX0PKAcA2BQRlKMzbPh6b0s+SSf61xGIGx n/Z5MjHUP+rs+Ujc2/2XaXwSY81P70W88PrCRA5BIZCwC1zQcP2hZ0yoJN2Tpr53mp4ZMRj+hTc7l cazdiyUg==; 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 1swMj3-000000080cy-48HD; Thu, 03 Oct 2024 14:22:42 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id A8F1F30083E; Thu, 3 Oct 2024 16:22:40 +0200 (CEST) Date: Thu, 3 Oct 2024 16:22:40 +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: <20241003142240.GU5594@noisy.programming.kicks-ass.net> References: <20241003084039.GS5594@noisy.programming.kicks-ass.net> <20241003084743.GC33184@noisy.programming.kicks-ass.net> <20241003092707.GD33184@noisy.programming.kicks-ass.net> <20241003122824.GE33184@noisy.programming.kicks-ass.net> <83d29a0c-dab2-4570-8be0-539b43237724@paulmck-laptop> 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: <83d29a0c-dab2-4570-8be0-539b43237724@paulmck-laptop> On Thu, Oct 03, 2024 at 05:45:47AM -0700, Paul E. McKenney wrote: > I ran 100*TREE03 for 18 hours each, and got 23 instances of *something* > happening (and I need to suppress stalls on the repeat). One of the > earlier bugs happened early, but sadly not this one. Damn, I don't have the amount of CPU hours available you mention in your later email. I'll just go up the rounds to 20 minutes and see if something wants to go bang before I have to shut down the noise pollution for the day...