Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932473AbaKURIK (ORCPT ); Fri, 21 Nov 2014 12:08:10 -0500 Received: from cdptpa-outbound-snat.email.rr.com ([107.14.166.229]:38023 "EHLO cdptpa-oedge-vip.email.rr.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751596AbaKURII (ORCPT ); Fri, 21 Nov 2014 12:08:08 -0500 Date: Fri, 21 Nov 2014 12:08:05 -0500 From: Steven Rostedt To: Linus Torvalds Cc: Andy Lutomirski , Tejun Heo , "linux-kernel@vger.kernel.org" , Thomas Gleixner , Arnaldo Carvalho de Melo , Peter Zijlstra , Frederic Weisbecker , Don Zickus , Dave Jones , the arch/x86 maintainers Subject: Re: frequent lockups in 3.18rc4 Message-ID: <20141121170805.GD30603@home.goodmis.org> References: <20141120221122.GA25393@htj.dyndns.org> <20141120230514.GB25393@htj.dyndns.org> <20141120233920.GC25393@htj.dyndns.org> <20141121162742.GB15461@htj.dyndns.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) X-RR-Connecting-IP: 107.14.168.118:25 X-Cloudmark-Score: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 21, 2014 at 08:48:58AM -0800, Linus Torvalds wrote: > > (The 64-bit mode also has a "WARN_ON_ONCE(in_nmi())", which I guess is > good - but it's good because the 64-bit version is written the way it > is). Actually, in_nmi() is now safe for vmalloc faults. In fact, it handles the clobbering of the cr2 register just fine. I wrote tests to test this, and submitted patches to get rid of that warn on. But that never went through. https://lkml.org/lkml/2013/10/15/894 -- Steve -- 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/