Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754223AbbKXQk0 (ORCPT ); Tue, 24 Nov 2015 11:40:26 -0500 Received: from pandora.arm.linux.org.uk ([78.32.30.218]:53821 "EHLO pandora.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753525AbbKXQkW (ORCPT ); Tue, 24 Nov 2015 11:40:22 -0500 Date: Tue, 24 Nov 2015 16:40:14 +0000 From: Russell King - ARM Linux To: Juri Lelli Cc: "Paul E. McKenney" , LKML , ALKML Subject: Re: suspicious RCU usage on 4.4-rc2 ARM platform Message-ID: <20151124164014.GF8644@n2100.arm.linux.org.uk> References: <20151124162750.GE20439@e106622-lin> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20151124162750.GE20439@e106622-lin> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 698 Lines: 16 On Tue, Nov 24, 2015 at 04:27:50PM +0000, Juri Lelli wrote: > I'm hitting these splats while running simple hotplug tests on an ARM > TC2 platform. The following seems to cure it, but I don't think it never > made it to mainline: It looks like it's because of the way we take CPUs offline. It's a known problem, one which is not simple to resolve. -- FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/