From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754412Ab3JGImm (ORCPT ); Mon, 7 Oct 2013 04:42:42 -0400 Received: from cantor2.suse.de ([195.135.220.15]:35505 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753908Ab3JGIml (ORCPT ); Mon, 7 Oct 2013 04:42:41 -0400 Date: Mon, 7 Oct 2013 09:42:37 +0100 From: Mel Gorman To: Steven Rostedt Cc: linux-kernel@vger.kernel.org Subject: Re: [REGRESSION] jump label safety checks break automatic numa balancing Message-ID: <20131007084237.GE11028@suse.de> References: <20130930143955.GF2425@suse.de> <20131004110356.42a2d268@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20131004110356.42a2d268@gandalf.local.home> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 04, 2013 at 11:03:56AM -0400, Steven Rostedt wrote: > > FYI, please remove my redhat email from your address book. I don't read > my RH email when I travel (which I've been doing a lot lately). > > > On Fri, 04 Oct 2013 10:44:00 -0400 > Mel Gorman wrote: > > > With CONFIG_NUMA_BALANCING=y and booting with numa_balancing=enable > > there is a crash very early in the lifetime of the system. By setting > > earlyprintk=ttyS0,115200 the error is visible and looks something like > > this > > > > [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-3.11.0-vanilla+ root=/dev/sda5 reboot=pci console=tty0 console=ttyS0,115200 numa_balancing=enable earlyprintk=ttyS0,115200 > > [ 0.000000] Unexpected op at task_numa_fault+0x1d/0xa0 [ffffffff81085ded] (0f 1f 44 00 00) arch/x86/kernel/jump_label.c:53 > > PANIC: early exception 06 rip 10:ffffffff815b2663 error 0 cr2 ffff88107ffff000 > > What's at ffffffff815b2663? > kernel/sched/fair.c:5901 -- Mel Gorman SUSE Labs