Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932946AbaKRVba (ORCPT ); Tue, 18 Nov 2014 16:31:30 -0500 Received: from mx1.redhat.com ([209.132.183.28]:56874 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932494AbaKRVb2 (ORCPT ); Tue, 18 Nov 2014 16:31:28 -0500 Date: Tue, 18 Nov 2014 16:31:13 -0500 From: Dave Jones To: Don Zickus Cc: Thomas Gleixner , Linus Torvalds , Linux Kernel , the arch/x86 maintainers Subject: Re: frequent lockups in 3.18rc4 Message-ID: <20141118213113.GA31432@redhat.com> Mail-Followup-To: Dave Jones , Don Zickus , Thomas Gleixner , Linus Torvalds , Linux Kernel , the arch/x86 maintainers References: <20141117170359.GA1382@redhat.com> <20141118020959.GA2091@redhat.com> <20141118023930.GA2871@redhat.com> <20141118145234.GA7487@redhat.com> <20141118212553.GX108701@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20141118212553.GX108701@redhat.com> 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 On Tue, Nov 18, 2014 at 04:25:53PM -0500, Don Zickus wrote: > I was going to reply about both points too. :-) Though the mangling looks > odd because we have spin_locks serializing the output for each cpu. > > Another thing I wanted to ask DaveJ, did you recently turn on > CONFIG_PREEMPT? That would explain why you are seeing the softlockups > now. If you disable CONFIG_PREEMPT does the softlockups disappear. I've had it on on my test box forever. I'll add trying turning to off to the list of things to try. Dave -- 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/