Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754189AbbGFH56 (ORCPT ); Mon, 6 Jul 2015 03:57:58 -0400 Received: from casper.infradead.org ([85.118.1.10]:44087 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753636AbbGFH5z (ORCPT ); Mon, 6 Jul 2015 03:57:55 -0400 Date: Mon, 6 Jul 2015 09:57:46 +0200 From: Peter Zijlstra To: Arthur Marsh Cc: linux-kernel@vger.kernel.org, Rusty Russell , Steven Rostedt , Mathieu Desnoyers , Oleg Nesterov , "Paul E. McKenney" Subject: Re: lock-up with module: Optimize __module_address() using a latched RB-tree Message-ID: <20150706075746.GR18673@twins.programming.kicks-ass.net> References: <55997889.5020101@internode.on.net> <20150706071911.GT3644@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150706071911.GT3644@twins.programming.kicks-ass.net> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 912 Lines: 20 On Mon, Jul 06, 2015 at 09:19:11AM +0200, Peter Zijlstra wrote: > On Mon, Jul 06, 2015 at 04:03:45AM +0930, Arthur Marsh wrote: > > I am happy to supply further details and run further tests. > > A .config and gcc version might be a good start. I'll see if 32bit > userspace in KVM can reproduce. So I build i386_defconfig and i386_defconfig + CONFIG_SMP=n, installed them in an old gentoo-stage3 userland diskimage and booted it with KVM with only a single CPU, both booted just fine. Then I loaded a module (iptable_nat) and that too worked on both. So I'm a bit at a loss and will need more details. Sadly I do not have access to AMD hardware of that vintage. -- 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/